J5 AT Passenger Car Service Manual Table of Contents
Sub-volume for Inspection and Repair of Electrical Circuits
Foreword
To help the servicemen understand properly and be
familiar with the JAC models and be able to perform
quick maintenance and reasonable service on them,
we edited this volume for Inspection and Repair of
Heyue VVT Electrical Circuits.
This volume details the complete Heyue VVT
wiring schematics and harness diagrams,
accompanying the description and illustration of the
positions of the whole electrical components and
sensors in the vehicle, in order to allow the
servicemen to perform quick detection and location
of the Heyue VVT circuit faults. Do not copy or use
any part of this volume in any form or any manner
without written permission.
Any unauthorized duplication of this volume is a
violation of applicable laws.
Table of Contents
Table of Contents
How to Use This Manual
Wiring Diagrams
Component Positions
Harness Layout
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How to use this manual
Description ...................................................................................................... 2
Representation method ................................................................................... 6
Fault checking instruction ............................................................................. 13
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Description
This manual includes four main tools for checking and troubleshooting of electric circuit faults.
Diagram of Electric Circuit
Index of Component Location
Layout of Components
Layout of Harness
In which, the shapes of the wire connectors are attached to the diagram of electric circuit.
Diagram of Electric Circuit
Each system should start from its diagram of electric circuit. These diagrams of the electric circuits
describe the working paths of all components. For instance, the power supply of starter system and its
cathode earth, the location of wire connectors, the constituent fuses and switches of the circuit, etc.
To diagnose and resolve the fault, firstly it’s necessary to fully understand the circuit diagram.
起动系统-1
蓄电池B+
F13
2
4
3
1
OFF
ON
2
3
4
1
ON
OFF
R/L11
起动
机
13
I/P-D
20.0R
1
1
E26
E28
启动机电源输入
E26
1
1
启动机线圈
E28
启动保护继电器
R/L11
1 2
3
4
防盗继电器
0.5V
5
EE01
2.0 P
0.5
B
10A
B-1
1 2 3
654
EE01
1 2 3
654
2.0 P
2.0 R
C-1
0.85W/R
F42 20A
2.0 R
0.5V
M39
F13
10A
006
A-8
007
0.5V
0.5V
0.5LW
008
A-14
0.5P
1 2
3
4
091
H-5
M39
Anti-theft relay
Starter system-1
Battery B+
Starter power input
Starter coil
Starter protection relay
Starter
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Index of Component Location
To locate the illustrated components on the vehicle, please refer to the index of component location
succeeding the diagram. The index of component location lists the main components, earths,
connectors, etc.
Starter system-2
Index of component location
B-2
Component code
E26
E28
Connector
I/P-D
EE01
Component name
Starter power input
Starter coil
Layout of Components
On the layout of components, it can easily find out the installation location of parts and wire
connectors listed in the index of component location.
M10
Radio/au
dio player
B (CD)
M01 Interior
temperature
sensor
M09
Radio/audio
player A
(Shared by
DVD and CD)
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Shape of Wire Connectors
This part describes the shape of every wire connector indicated in the circuit diagram and the specific
location of every wire on the wire connector based on its color and terminal. The shape diagram of
the wire connector can assist you to find out the location to be checked. Interpretation of shape
diagram: It is towards the male wire connector from the female wire connector harness while the wire
connector is not disconnected and is the frontal view of component or male wire connector while the
wire connector is disconnected. If the wiring on the wire connector is shared by multiple systems, it
indicates that this wire connector is one shared wire connector.
Shape Diagram of Wire Connectors and Sequence Diagram of
Terminals
1. Shape Diagram of Wire Connectors
Actual
diagram
Socket
Plug
Description
The socket and plug are differentiated by
terminals, instead of by the opening of the
shield.
To number the connectors, please refer to
the table below.
Some connectors can’t be numbered as
per this method. Please refer to the
section “Configuration of Connectors”.
Diagram in
this manual
E27 Alternator power input
E25 Alternator
Locking point
Locking point
Shield
Shield
Terminal
Terminal
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2. Sequence Diagram of Terminals
Numbering sequence
Description
Socket
Number from upper right to lower left
Plug
Number from upper left to lower right
Layout of Harness
The layout of harness describes the installation and fixing location of main harnesses and wire
connectors and the routes of main harnesses. These layouts of harnesses make the circuit checking &
repair easier.
FD04
D19-1
D18-1
D21-1
D18-1 左后玻璃升降开关
D19-1 左后门闭锁执行器
D21-1 左后玻璃升降电机
FD04 地板线束接口
左后门线束说明
Description of left rear door harness
D18-1 Left rear glass lifter switch
D19-1 Left rear door locking actuator
D21-1 Left rear glass lifter motor
FD04 Floor harness connector
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Representation method
This manual adopts the representation of electric devices, electric symbols and abbreviations as below.
Representation on Circuit Diagram
The current breaker can be used repeatedly
and can cut out the current under application
of heat while the current is overloaded. Some
current breakers can automatically reset after
cooling-down and some must be reset
manually.
Component
Diode
The solid line means that the component is
completely visible.
The diode means that the current can only
flow as per the direction shown by the arrow.
The dashed line means that the component is
partially visible.
Means live at position “ON”
Fuse and fusible wire
Fuse case
Means that the short end is
connected with other fuse.
Fuse number
Allowable current of protective loop
The name is attached to the upper right
corner of the component.
The functional description is succeeding
the name of the component.
Brake
lamp
switch
(This
switch is
turned
off upon
the
depress
of the
brake
pedal)
Connector
Plug
Connector number
Socket
Terminal number within connector
Normally live
Engine compartment relay case
Fusible piece
Means that the connector is directly connected
with the component.
Means that the connector is connected to the
component via wire.
Current breaker
Means the screw wiring terminal of the part.
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The break line means that the circuit is open,
but actually is on.
Means that the shielding layer,
which is always grounded, is
covered onto the wire, in order to
prevent the radio interference.
The wire color is yellow, with one red line on it.
Fuse case
See power distribution in page SD-15.
The branch circuit only indicates the
connecting point. Please refer to the
identified circuit for details of
supplemental wires.
The circuit is connected on two pages and the
arrow means the current direction. You can find
the “A” on the identified location.
The connecting arrow of one wire
points to another circuit.
Connecting point
Number of connecting point
Circuit name
The connecting point is expressed
by a dot and the specific location
of these connecting points varies
depending on different vehicle
models.
The different selection of circuit is expressed by the
selection parentheses in figure below.
The broken line means that only partial
circuit is displayed. Please refer to the
circuit listed in the component diagram.
See grounding distribution in page SD-23.
Automatic gear
Manual gear
Grounding “G”
This symbol means that the end
of the wire is connected with the
body metal.
This grounding symbol (one-point and
three-wire) means that the component
housing is connected with the body metal.
The dashed line means that the red line and the
yellow/blue line are both on the E35 connector.
Shielded wire
Live at position "ON"
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Switch
Connector
Relay
Indicator
These switches are moved together and the
dashed line means that the switches are
connected with each other via the
mechanical device.
Indicates that the multiple
power wires are connected.
This relay indicates the status while there is
no current in the coil. The contact will be
switched while there is current in the coil.
Means that the seat belt warning
lamp is linked with other
indicators in the combined
instrument.
The indicator is displayed by the
illuminated symbol.
Normally open contact
Normally closed contact
Indicator
Safety belt
alarm light
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Electric Symbols on Circuit Diagram
电气符号
-+
蓄电池
向电路直接补充电流
通过化学作用产生电流
线束接地点
03
池负极，形成回路
通过线束连接车身接地点，使电流接蓄电
缓熔器
片式保险片
片式保险片
缓熔器
如果电流超过额定电流，易熔丝则熔断，电
灯光照明
电阻
电机
M
P
泵
电加热
点烟器
车载电源
喇叭
扬声器
开关
流通过。
通过打开或闭合回路，来允许或阻止当前电
二极管
发光二极管
二极管，只允许电流在一个方向通过。
二极管发光时不产生热量，与普通灯泡不同。
当电流通过时发光。
当电流通过灯丝，产生光，并散发热量
流随即被切断
警惕：更换熔断器的时候不可超过额定电流
主要用于串联电路，保护限定额定电压的电
器件
通过电能转化成机械能
通过电机的作用，吸放气体或液体
通过电流产生热量
通过电流产生热量，也可做车载电源使用
可给符合额定电压的外接用电器配电
通过电流发出声音
符
号 说 明 符
号 说 明
Electric symbol
Symbol description
Symbol description
Battery
Electric heating
Cigarette lighter
Harness grounding
point
●Generates current by means of chemical
reaction
● Directly supply current to the circuit
●Connects the body grounding point via
harness so that the current flows to battery
cathode to form circuit.
●Generates heat by means of current
●Generates heat by means of current, and
can be used as on-board power supply.
Slow-blow fuse
●If the current exceeds the rated current,
the fusible wire will be broken and the
current is cut out accordingly.
●Warning: When replacing the fuse, the
rated value of the new fuse shall not exceed
the rated current.
On-board power
supply
●Powers the external electric appliances
in conformity with the rated voltage.
Fuse piece
Slow-blow fuse
Fuse piece
Horn
●Generates sound by means of current.
Lighting
●Generates lighting and radiates heat when
the current flows through lamp filament.
Speaker
Resistance
●Mainly used in series circuits to protect
the electric devices with limited rated
voltage.
Switch
●Allows or obstructs the flow of current
by turning on or off the circuit.
Motor
●Converts the electric power to mechanical
power
Diode
●The diode only allows the current to flow
in one direction.
Pump
●Sucks or drain the gas or liquid by means
of the functioning of motor.
LED
● Illuminates while the current flows
through.
● Differing from common bulbs, the
illuminating LED will not generate heat.
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回路内连
A B
C
D
上图式代表回路C-D内连于回路A-B。
电气符号
电气符号
OFF
ON
常开继电器
OFF
ON
常闭继电器
用于给发动机散热。
风扇
传感器
（热敏电阻型）
传感器
（滑动电阻型）
电阻值随温度变化而改变。
电阻值随部件位置改变而改变。
OFF
ON
无电流
通过线圈产生磁力，吸合继电器触点，使电流通过。
有电流
线圈无电流通过时 线圈有电流通过时
通过线圈产生磁力，吸合继电器触点，使电流通过。
OFF
ON
有电流 无电流
线圈无电流通过时 线圈有电流通过时
符
号 说 明
符 号 说 明
Electric symbol
Symbol description
Electric symbol
Symbol description
Sensor
● The resistance changes following the
variation of temperature.
Sensor
(Thermistor type)
(Sliding resistor
type)
● The resistance changes following the
change of component location.
●Used to radiate the engine.
Fan
Internal connection
of circuit
●The above figure means that the circuit
C-D is connected with circuit A-B.
Normally open relay
●Generates magnetic force via coil to engage relay contact and enable current flow.
When there is no current flow in coil
Without
current
With
current
When there is current flow in coil
●Generates magnetic force via coil to engage relay contact and enable current flow.
Normally closed
relay
When there is no current flow in coil
When there is current flow in coil
With
current
Without
current
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Description of Wire Color
Wire Color
Code
Wire Color
Code
Black
B
Orange
O
Blue
L
Pink
P
Brown
Br
Red
R
Green
G
Violet
V
Grey
Gr
Yellow
Y
Light green
Lg
White
W
Harness Identification and System Function Paging Code
Based on the different location of the wires, the harness is classified as below:
Harness Name
Connector Code
Main harness
M
Engine compartment harness and power
supply harness
E
Control harness
C
Frame harness
F
Door harness
D
Tailgate harness and ceiling harness
R
Parking distance control sensor harness
F
Airbag harness
A
Earth
G
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Identification of Wire Connectors
The identification of the wire connectors consists of the harness location identification and the wire
connector identification. Refer to the Layout of Harness for the location of wire connectors.
For instance:
Notice
The wire connector between harnesses is identified with the code below:
For instance:
Relay Identification
The relay identification consists of the abbreviation of relay and the main code (serial number).
For instance:
E 10
Means main code of wire connector (serial number)
Means harness location code (engine harness)
R/L 18
Means main code of relay (serial number)
Means abbreviation of relay
M R 01
Means main code of wire connector (serial number)
Rear harness
Main harness
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Fault Checking Instruction
Fault Checking Procedure
Check as per the 5 steps as below.
1. Verification of customer dissatisfaction
To conduct the correct repair, the faulty
components of the electric circuit reported by the
customers shall be checked and recorded.
However, it’s disallowed to conduct the
disassembling before determining the cause.
2. Interpretation and analysis of electric
circuit diagram
Based on the system circuit diagram, analyze and
judge the faulty components from the power
supply to earth within the entire electric circuit
and decide the operation method. If it’s
impossible to decide the operation method, refer
to the operation reference manual of electric
circuit. In addition, check other circuits shared by
the faulty circuit. Such as, check the shared
circuit not checked in the 1
st
step, referring to the
shared system circuit (fuse, earth, open-end, etc.)
in the circuit diagram. If the shared circuit
functions normally, the fault lies in the circuit
itself. If several circuits have problems, the fault
may lies in broken fuse or faulty earth.
3. Checking of circuit and components
Conduct the checking of 2
nd
step with tester. The
effective fault diagnosis should be of simple and
logical operation procedure. Determine the fault
cause by means of the fault diagnosis procedure
or the fault diagnosis table and check from the
most possible cause and the location with the
easiest accessibility.
4. Troubleshooting
Find out the fault and conduct the necessary
repair.
5. Confirmation of normal functioning of
circuit
At completion of the repair, to confirm that the
fault is resolved, rechecking shall be conducted.
If the fault lies in broken fuse, all circuits sharing
this fuse shall be checked.
Fault Diagnosis Equipment
Voltmeter and testing lamp
The testing lamp or voltmeter can be used to
check the circuit status and the testing lamp can
be used to check the presence of voltage. The
testing lamp consists of one pair of wires and one
12V bulb. During the checking, contact one wire
to the earth and another wire to certain measuring
point. If the lamp lights up, it indicates the
presence of voltage at such measuring point.
Notice
When checking the voltage of electronic
control module, such as checking the voltage of
engine control module (ECM) used in the
electronic fuel injection engine, make sure to
check with the digital voltmeter with 10M
resistance value or above. Using the testing
lamp to check the module circuit may damage
the internal circuit. Therefore, it’s absolutely
prohibited to use the testing lamp to check the
electric circuit.
The voltage is used as per the same way of the
testing lamp and the only difference lies that the
testing lamp can only be used to check the
presence of voltage and the voltmeter can be used
to check the voltage value.
Powered Testing Lamp and Ohmmeter
Use the powered testing lamp or ohmmeter to
check the conductivity of the circuit. The
powered testing lamp consists of the bulb,
battery, and two wires. The bulb lights up when
two wires are connected. Before the checking,
disconnect the cathode wire of the battery and
pull out the fuse of such circuit.
Testing lamp
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Notice
Using the powered testing lamp to check the
module circuit may damage the internal
circuit. Therefore, it’s absolutely prohibited to
use the powered testing lamp to check the
electric circuit.
The ohmmeter is used as per the same way of the
powered testing lamp and the only difference lies
that the ohmmeter can indicate the resistance
value. The low resistance value indicates the
good conductivity performance.
The semi-conductor units must be checked with
the digital multimeter with 10M resistance value
or above. When checking the resistance with
digital multimeter, disconnect the cathode wire of
the battery, or it will obtain the wrong resistance
value. When measuring the resistance with
ohmmeter, the diode or semi-conductor units in
the circuit may influence the measurement. To
check whether the unit is influencing the
measurement, measure one value first and then
change the polarity before measuring again. If
two measurements are not equal, it indicates that
the semi-conductor unit is influencing the
measurement.
Jumper Cable with Fuse
Use the jumper cable to check the open-loop
circuit.
The jumper cable is one checking tool to be series
connected with the wire being tested.
The jumper cable can be used along with most
wire connectors, without damaging the wire
connectors.
Warning
To protect the circuit being checked, never use
the jumper cable with fuse in excess of its
rated value nor use the jumper cable to
substitute the output or input signal while the
control module (such as ECM, TCM) is
connected.
Short-Circuit Detector
The short-circuit detector can find out the
location of short-circuit. The short-circuit
detector generates the magnetic pulse while
checking the circuit with short-circuit, so as to
find out the location of short-circuit.
Fault Checking
1. Voltage Checking
Check one point for presence of voltage. When
checking one terminal of the wire connector, it
may test from the back of the wire connector,
instead of disconnecting the wire.
① When checking the voltage with testing lamp
or voltmeter, connect the cathode wire of the
tester with the battery cathode.
② Connect another wire of the testing lamp or
voltmeter to the location to be measured.
③ When checking with testing lamp, the
illumination of the testing lamp indicates the
presence of voltage. When checking with
voltmeter, it indicates the fault of circuit if the
reading of the voltmeter is lower than the
specified value by more than 1V.
Powered testing lamp
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2. Power-on Testing
① Disconnect the cathode of the battery.
② Connect one wire of the powered testing
lamp or ohmmeter to the location to be
checked. When using the ohmmeter,
short-circuit two wires of the ohmmeter to
reset the ohmmeter.
③ Connect another wire of the tester to another
terminal of the load to be checked.
④ The illumination of powered testing lamp
indicates the conductivity. When the
ohmmeter is used, the very small or near
zero reading of the ohmmeter indicates the
excellent conductivity.
3. Short-Circuit Testing
① Disconnect the cathode of the battery.
② Connect one wire of the powered testing
lamp or ohmmeter to one terminal of the
fuse.
③ Connect another wire of the powered testing
lamp or ohmmeter to the earth.
④ Check in turn from the harness near the fuse
case. Repeat above operation, till it’s about
15cm away from the powered testing lamp
or ohmmeter.
⑤ The illumination of powered testing lamp or
the reading of ohmmeter indicates that the
short-circuit lies between this part and the
earth.
Powered testing lamp
or ohmmeter
Powered
testing lamp or
ohmmeter
Testing
lamp or
voltmeter
Fuse case
(Remove fuse)
Brake lamp
switch
Normally live
Tester fuse case
Switch
Coil
Switch
Coil
Disconnect load
Short-circuit
Turn off power supply
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4. Checking with Short-Circuit Detector
① Pull out the broken fuse and disconnect the
cathode of battery.
② Connect the short-circuit detector to the
terminal of fuse.
③ Turn on the switch to check the circuit.
④ When the short-circuit detector moves to the
location of short-circuit, the magnetic pulse
is generated between the fuse and the
short-circuit location.
⑤ From the fuse case, move the short-circuit
detector gradually along the wire. Once the
short-circuit detector is between the fuse and
the short-circuit location, the pointer will
move following the size of the pulse current.
Once the short-circuit detector moves
beyond the short-circuit location, the pointer
will stop.
Checking Precautions
Battery Wires
Disconnect the cathode wire of the battery
before disconnecting the connector or removing
the electric components.
Harness
To remove the harness from the clip of the frame
or the body, pry upward the locking mechanism
of the clip with the slotted screwdriver.
Point where pointer
stops movement
Turn off power supply
Fuse case
(Remove fuse)
Short-circuit indicator
Pulsed magnetic field
Detector
Pulsed magnetic field
Move detector
along wire
Short-circuit
Switch
Coil
Cathode wire of battery
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Do not remove the protective tape from the
surface of the harness, or the wire will friction
with components to cause water seepage and
short-circuit.
Disconnection of Connectors
To disconnect the connectors, grasp the plug and
socket, instead of grasping the wire.
Disconnect the connectors by pressing or pulling
the locking lever and do not disconnect the
connectors with force.
Locking of Connectors
Lock the connectors, till one click sound is
heard, which indicates that the connectors are
locked.
Wrong
Wrong
Correct
Click
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Checking of Circuit
When checking the circuit conductivity or
measuring the circuit voltage with one
measuring device, insert in the probe of the
measuring device from the connector harness
side.
For water-proof connectors, as it’s impossible to
insert in the probe from the connector harness
side, check from the connector side. In addition,
to prevent damaging the wiring terminal, before
inserting into the wiring terminal, wrap one thin
wire around the probe.
Sensor, Switch and Relay
Handle the sensor, switch and relay with care
and do not drop or knock with other objects.
Wrong
Correct
Wrong
Correct
Wrong
J5 Workshop Manual Wiring Diagrams
Table of Contents of Wiring Diagrams
Power Distribution System ........................................................................................................................... 19
Starting System ............................................................................................................................................. 40
Charging System ........................................................................................................................................... 42
Engine ECU System ..................................................................................................................................... 44
Reversing System ......................................................................................................................................... 54
ACC System-DVD ....................................................................................................................................... 57
ACC System- Cigarette Lighter, Sunvisor Lighting ..................................................................................... 59
Lighting-Headlamp ....................................................................................................................................... 61
Lighting-Small lamp ..................................................................................................................................... 62
Lighting- Front Foglamp, Central Switch Combination ............................................................................... 65
Lighting ........................................................................................................................................................ 66
Lighting- Turn Signal Lamp, Warning lamp ................................................................................................. 67
BCM System ................................................................................................................................................. 69
Power Rearview Mirror ................................................................................................................................ 78
Sunroof System ............................................................................................................................................. 80
Combination Switch ..................................................................................................................................... 82
Airbags.......................................................................................................................................................... 84
Diagnosis System ......................................................................................................................................... 86
ABS, Brake System ...................................................................................................................................... 88
A/C System-Blower ...................................................................................................................................... 90
A/C System-Temperature Sensor .................................................................................................................. 91
A/C System-Mode Motor, Temperature-control Motor ................................................................................ 92
A/C System-Compressor .............................................................................................................................. 84
A/C System-Water-temperature Sensor, Throttle Sensor, Throttle motor..................................................... 95
Instrument System ........................................................................................................................................ 97
Power Glass Regulator ............................................................................................................................... 106
Door Lockout .............................................................................................................................................. 111
Door Switch ................................................................................................................................................ 114
Rear wiper, Brake lamp, High-mounted brake lamp .................................................................................. 116
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J5 Workshop Manual Wiring Diagrams
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J5 Workshop Manual Wiring Diagrams
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113
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114
J5 Workshop Manual Wiring Diagrams
115
J5 Workshop Manual Wiring Diagrams
116
J5 Workshop Manual Wiring Diagrams
117
J5 workshop Manual Component Positions
118
Component Positions
Trunk lid harness ...................................................................................................................................... 119
Front left door harness ................................................................................................................................ 120
Rear left door harness ................................................................................................................................. 121
Roof harness ............................................................................................................................................... 123
Engine control harness ................................................................................................................................ 124
Main harness ............................................................................................................................................... 127
Engine compartment harness ...................................................................................................................... 131
Frame harness ............................................................................................................................................. 134
J5 workshop Manual Component Positions
119
Trunk lid harness
R20
R06
R05
R18
FR01
R20 Rear right
reversing lamp
R06 Right license plate
lamp interface
R18 Rear left
reversing lamp
R05 Left license plate
lamp interface
FR01 Frame bus interface
Trunk
J5 workshop Manual Component Positions
120
Front left door
D01
D02
D09
D08
D05
D07
D01 External
rearview mirror
interface
D02 Loudspeaker interface
D09 Front left
low-sounding horn
D08 Glass regulator motor
interface
D05 Glass regulator switch
interface
D07 Courtesy light
harnessinterface
J5 workshop Manual Component Positions
121
D06
Rear left door
D21-1
D23
D18
D25
D18 Glass regulator
switch
D21-1 Rear left
low-sounding horn
D23 Glass regulator
interface
D25 Door lock actuator
interface
D06 Door lock actuator
interface
J5 workshop Manual Component Positions
122
Roof
R14
R13
R10a R17
R10
R14 Left-side sun visor
interface
R13 Right-side sun visor
interface
R10a Front roof lamp
interface
R10 Rear roof lamp
interface
R17 Sunroof control
interface
J5 workshop Manual Component Positions
123
Engine control harness
C01
C02
C03
C04
C05
C06
C01 Engine ECU
interface
C02 Accelerator
interface
C03 Brake lamp interface
C04 Rear oxygen sensor
interface
C07 Front oxygen sensor
interface
C06 Vehicle speed sensor
interface
C05 Brake fluid level sensor
interface
J5 workshop Manual Component Positions
124
C08
C09
C10
C11
C12
C13
C08 Front wiper motor
interface
C09 Revering lamp
interface
C10 Throttle position sensor
C11 Crankshaft position
sensor
C13 Knock sensor
C12 Oil pressure switch
J5 workshop Manual Component Positions
125
C14
C15
C16
C17
C18 C19 C20 C21
C22 C23 C24 C25
C14 Canister solenoid
C15 Water-temperature sensor
interface
C16 Camshaft position
sensor
C17 Absolute pressure
sensor
Ignition1,2,3,4
Nozzle1,2,3,4
J5 workshop Manual Component Positions
126
C26
C27
CE01
CM01
G31
G32
C26 VVT control valve
C27 Power steering pump
CE01 Front
compartmentharnessinterface
CM01 Main harnessinterface
G31 Engine ground
G32 ECU ground
J5 workshop Manual Component Positions
127
Main harness
M01
M08
M09
M14
M13
M18
M01 Indoor temperature
sensor
M08 Combination
instrumentinterface
M09 DVD interface
M14 Ignition
switch
interface
Headlamp height
adjustment
Small lamp
brightnessadjustment
M13 Rearview mirror
opening
M18 Diagnosis
interface
J5 workshop Manual Component Positions
128
M15 M19
M21
M22a M22b
M23
M34
M35
M15 Combination
switch—light
interface
M19 Combination
switch—wiper
interface
M21 Cigarette lighter
harnessinterface
M22b A/C
panel B
M22A A/C
panel A
M23 Buzzer
harnessinterface
M34 Co-driver’s
seat belt
interface
M35
Driver’s
seat belt
interface
J5 workshop Manual Component Positions
129
M33
M36 M37
M41
M4F01 M4F02 M4F03
M43
ME01 ME02 ME03
M33 Airbag computer harness
M36
ETAC-A
interface
M37 ETAC-B
interface
M41 Key
insertion switch
interface
M4F01 Frame
harnessinterface D
MF02 Frame
harnessinterface
MF03 Frame
harnessinterface
ME01 Engine
harnessinterface A
Glove
compartment
M43 Door lock relay
interface
ME03 Engine
harness interface C
ME02 Engine
harnessinterface B
J5 workshop Manual Component Positions
130
MA03a MA03b
MC01
M52
M54
M47 M48
M51
MA03b A/C
harness B
MA03a A/C
harness A
MC01 Engine
control
harnessinterface
M52 Front on-board
power supply interface
M54 Warning lamp switch
interface
M47
Short-circuiter B
M48
Short-circuiter C
M51
Short-circuiter F
J5 workshop Manual Component Positions
131
Engine compartmentharness
E27
E16
G06
E22
E21
E19
E27
ABS
interface
E16
Ternary
pressure
switch
G06
ABS
ground
E22
Front
right
wheel
speed
sensor
E21 Front
right
headlamp
E19
Washer
motor
J5 workshop Manual Component Positions
132
E18
E12
G31
E17
E10 E11 E15
E13
E12
Condens
er fan
E18 Front right
foglamp
E11
Low-soun
ding horn
G31
Engine
ground
E17
Compress
or
interface
E15 Outdoor
temperature sensor
E10
Loud
horn
E13
Radiator
fan
J5 workshop Manual Component Positions
133
E09
G06
E14
E04
ME01 ME02 ME03
I/P-B I/P-C I/P-F
E09 Front
left
headlamp
E14 Front
left
foglamp
E04 Front
left wheel
speed
sensor
I/P-B
Indoor
electrical
box
connector
B
ME03
Main
harness C
ME01
Main
harness A
ME02 Main
harness B
I/P-F Indoor electrical box connector F
I/P-C
Indoor
electrical
box
connector
C
G06 ABS
ground
J5 workshop Manual Component Positions
134
Frame harness
R/L21 R/L22
FD01
FD04 F20
F22
F08
F12
R/L21
Flasher
relay
R/L22
Warning
lamp
relay
FD01,FD
02 Front
left door
harness
assembly
FD04
Rear left
door
harness
F22 Front
left door
contact
switch
F08 Rear
left wheel
speed
sensor
F12
Reversing
radar
controller
assembly
F20 Rear left door contact
switch
J5 workshop Manual Component Positions
135
F17
FR01
F11
F14 FR02
F31
F15
F17 Rear defrosting
power supply
F11
High-mo
unted
brake
lamp
FR01
Rear
harness
assembly
F14 Rear left
combination
lamp
FR02
Reversing
radar harness
F31 Tail-
gate lock
F15 Rear
right
combination
lamp
J5 workshop Manual Component Positions
136
FR03
F21 FD05
F23 F24 F09
F18
F05
F04
FR03
Front
right door
harness
assembly
F23 Rear
right door
contact
switch
F21 Front
right door
contact
switch
FD05
Rear right
door
harness
assembly
F18 Antenna
amplifier
F24 Ground
F09 Rear right
wheel speed
sensor
F05
Seat
belt
switch
F04
Parking
brake
system
J5 workshop Manual Component Positions
137
F07
F07 Fuel
sensor
and fuel
pump
B-Class Sedan Service Manual
Layout of Harness
141
Layout of Harness
Engine control harness ................................................................................................................. 142
Power supply harness ................................................................................................................... 144
Engine compartment harness ..................................................................................................... 146
Main harness .............................................................................................................................. 148
Frame harness .............................................................................................................................. 150
Ceiling harness ........................................................................................................................... 152
Left front door harness ............................................................................................................... 153
Right front door harness ............................................................................................................... 154
Left rear door harness ................................................................................................................ 155
Right rear door harness ................................................................................................................ 156
Tailgate harness ............................................................................................................................ 157
A/C harness .................................................................................................................................. 158
B-Class Sedan Service Manual
Layout of Harness
142
G21
G20
CO1
MC01
C38
C17
C34
C04
G22
C23
C22
C21
C20
C03
C02
C06
C18
C27
C31
C33
C39
C24
C35
C05
C10
C24
C25
C16
发动机控制线束
C11
C32
CE01
C12
Engine control harness
B-Class Sedan Service Manual
Layout of Harness
143
Description of engine control harness
C01 Engine ECU
C02 Intake pressure & temperature
sensor
C04 Stepping motor
C05 Throttle valve position sensor
C06 Knock sensor
C03 Carbon canister solenoid valve
C11 Engine coolant temperature
sensor
C10 Front oxygen sensor
C12 Phase sensor
C13 Water temperature sensor
C20 Fuel injector 4
C21 Fuel injector 3
C22 Fuel injector 2
C23 Fuel injector 1
C24 Ignition coil 2
C25 Ignition coil 1
C33 Brake lamp switch
C30 Engine oil pressure switch
C27 Engine speed sensor
C32 Backup lamp switch
C35 Rear oxygen sensor
C34 Brake fluid level sensor
C38 Front wiper motor
C39 Short-circuit device
MC01 Main harness connector
CE01 Front compartment harness
connector
G21 Ground 7-3
G20 Ground 7-2
G22 Ground 6 (front compartment)
B-Class Sedan Service Manual
Layout of Harness
144
E22
E24
G08
E26
E28
E25
E23
E27
E21
EE01
电源线束
G09
Power supply harness
B-Class Sedan Service Manual
Layout of Harness
145
Description of power supply harness
E28 Alternator regulator
E27 Alternator B+
E25 Alternator solenoid switch
E26 Starter
E21 Vehicle speed sensor
E23 Battery cathode
E24 Battery anode
EE01 Front compartment electric box
G08 Front compartment harness connector
G09 General ground
G09 Battery cathode ground
B-Class Sedan Service Manual
Layout of Harness
146
ME03
ME02
ME01
I/P-F
I/P-C
I/P-D
E26
E16
G06
E19
E21
E18
E11
E15
E10
E12
G04
E17
E13
E09
G03
E14
E25
E04
CE01
发动机舱线束
E22
E27
Engine compartment harness
B-Class Sedan Service Manual
Layout of Harness
147
Description of engine compartment harness
E04 Left front wheel speed sensor
E09 Left headlamp
E10 Tweeter horn
E11 Bass horn
E12 Condenser fan
E13 Radiator fan
E14 Left fog lamp
E15 Outdoor temperature sensor
E16 Three-way pressure switch
E17 Compressor connector
E18 Right fog lamp
E19 Washer motor
E21 Right headlamp
E22 Right front wheel speed sensor
E25 Left front turn lamp
E26 Right front turn lamp
E27 ABS connector
I/P-F Interior electric box connector
I/P-C Interior electric box connector
I/P-D Interior electric box connector
ME01 Main harness connector
ME02 Main harness connector
ME03 Main harness connector
CE01 Engine control harness
connector
G03 Engine left front grounding
G04 Engine harness right front
grounding
G06 ABS grounding
B-Class MPV Service Manual
Layout of Harness
148
M33
G30
M34
M35a
MF01
I/P-L
I/P-J
I/P-K
I/P-H
M18
M27 M13M05 M07
MC01
MA03a
MA03b
M25
M25a
M26
M45
M54
M32
M09M10
M22
M22a
M43
M21
M52
M37
M36
M15
M19a
M19M31 M14
M41
G13
M47
M48
M32a
M51M46
MF02
MF03
M38
ME01
ME02
ME03
M49
M50
主线束
Main harness
B-Class MPV Service Manual
Layout of Harness
149
Description of main harness
M01 Interior temperature sensor
M19 Radio/audio player A (Shared by DVD
and CD)
M10 Radio/audio player B (CD)
M10a Radio/audio player B (DVD)
M13 Rear view mirror switch
M18 Diagnosis connector
M15 Combination switch – lighting
M19 Combination switch - Wiper
M21 Cigarette lighter
M22 A/C panel A
M22a A/C panel B
M23 Parking distance control buzzer
M25 Glovebox switch (+)
M25a Glovebox switch (-)
M27 Sunlight sensor
M07 Combination instrument - B
M34 Driver seat belt
M35 Passenger seat belt
M36 ETACS A
M37 ETACS B
M30 Steering wheel switch
M31 Clock spring
M33 Airbag control A
M14 Ignition switch
M40 Electric clock
M41 Key insertion switch
M43 Door lock relay
M39 Anti-theft relay
M45 Automatic lighting sensor
M05 Dimmer switch
M51 Short-circuit device
M52 Front onboard power supply
M54 Warning lamp switch
M46 Short-circuit device
M32 PAB passenger airbag
M38 Small relay set
ME01 Engine harness connector A
ME02 Engine harness connector B
ME03 Engine harness connector C
MA03a A/C harness connector A
MA03b A/C harness connector B
MC01 Engine control harness connector
MF01 Floor harness connector A
MF02 Floor harness connector B
MF03 Floor harness connector C
I/P-H Interior connector H
I/P-J Interior connector J
I/P-K Interior connector K
I/P-L Interior connector L
G12 Main harness left grounding
G13 Main harness right grounding
G30 Airbag grounding
B-Class MPV Service Manual
Layout of Harness
150
I/P-A
I/P-B
FR01
F25
F10
F12
G02
FR02
F26
G05
F14
F22
F08
F04
F05
FD04
F20
MF02
MF01
MF03
G01
FD01
FD03
F21
FD05
F07
F09
F23
F15
E
B
C
A
FD01a
F28
F29
F30
车架线束
Frame harness
B-Class MPV Service Manual
Layout of Harness
151
Description of frame harness
F04 Handbrake switch
F05 Seat belt switch
F07 Fuel pump
F28 Door open/lock signal
F08 Left rear wheel speed sensor
F09 Right rear wheel speed sensor
F10 Trunk lamp
F12 Parking distance control
F14 Left rear combination lamp
F15 Right rear combination lamp
F20/21/22/23 Door switch
F25 Left rear door speaker
F26 Right rear door speaker
F29 Short-circuit device
F30 Tailgate switch
MF01 To main harness connector A
MF02 To main harness connector B
MF03 To main harness connector C
FD01a Left front door harness
connector
FD01 Left front door harness
connector
FD03 Right front door harness
connector
FD05 Right rear door harness
connector
FD04 Left rear door harness
connector
FR01 Tailgate harness connector
F28 Short-circuit device
FR02 Parking distance control
harness connector
I/P-A Interior electric box A
I/P-B Interior electric box B
G02 Body left rear grounding
G05 Body right rear grounding
G01 Front body grounding
B-Class MPV Service Manual
Layout of Harness
152
R14
R13
R10a
R10
I/P-G
顶棚线束
左侧遮阳板 R14
后顶灯 R10
前顶灯 R10a
右侧遮阳板 R13
室内保险盒 I/P-G
顶棚线束说明
Ceiling harness
Description of ceiling harness
Left sun visor R14
Rear ceiling lamp R10
Front ceiling lamp R10a
Right sun visor R13
Interior fuse case I/P-G
B-Class MPV Service Manual
Layout of Harness
153
FD01
D04
D06
D07
D08
D02
D01
D09
左前门线束
D02 高音扬声器
D01 外后视镜
D04 玻璃升降开关
D06 门锁执行器
D07 门灯
D08 玻璃升降电机
D09 安装定位点
FD01 门线束接插件
左前门线束说明
Description of left front door harness
D01 Outer rear view mirror
D02 Tweeter horn
D04 Glass lifter switch
D06 Door lock actuator
D07 Door lamp
D08 Glass lifter motor
D09 Positioning point for installation
FD01 Door harness connector
Left front door harness
B-Class MPV Service Manual
Layout of Harness
154
右前门线束
D10
D11
D15
FD03
D16
D12
D13
D14
D10 高音扬声器
D11 外后视镜
D12 玻璃升降开关
D13 门锁执行器
D14 门灯
D15 玻璃升降电机
D16 低音扬声器
FD03 地板线束接口
右前门线束说明
Description of right front door harness
D10 Tweeter speaker
D11 Outer rear view mirror
D12 Glass lifter switch
D13 Door lock actuator
D14 Door lamp
D15 Glass lifter motor
D16 Bass speaker
FD03 Floor harness connector
Right front door harness
B-Class MPV Service Manual
Layout of Harness
155
左后门线束
FD04
D19-1
D18-1
D21-1
D18-1 左后玻璃升降开关
D19-1 左后门闭锁执行器
D21-1 左后玻璃升降电机
FD04 地板线束接口
左后门线束说明
Description of left rear door harness
D18-1 Left rear glass lifter switch
D19-1 Left rear door locking actuator
D21-1 Left rear glass lifter motor
FD04 Floor harness connector
Left rear door harness
B-Class MPV Service Manual
Layout of Harness
156
FD05
右后门线束
D19-2
D18-2
D21-2
D18-2 玻璃升降开关
D19-2 门锁执行器
D21-2 玻璃升降电机
FD05 地板线束接口
右后门线束说明
Description of right rear door harness
D18-2 Glass lifter switch
D19-2 Door lock actuator
D21-2 Glass lifter motor
FD05 Floor harness connector
Right rear door harness
B-Class MPV Service Manual
Layout of Harness
157
R21
R19
R08
R07
R18
FR01
RR01
R20
R06
R05
尾门线束
R05 左牌照灯
R06 右牌照灯
R07 闭锁器
R08 门触开关
R18 天线放大器
R19 后雨刮
R20 天线放大器
R21 高位刹车灯
FR01 尾门线束接口
尾门线束说明
RR01 尾门扩展线束接口
Description of tailgate harness
R05 Left license plate lamp
R06 Right license plate lamp
R07 Locking mechanism
R08 Door contact switch
R18 Antenna amplifier
R19 Rear wiper
R20 Antenna amplifier
R21 High-mounted brake lamp
FR01 Tailgate harness connector
RR01 Tailgate expansion harness connector
Tailgate harness
B-Class MPV Service Manual
Layout of Harness
158
MA03a
A15
A16
A17
A18
A19
A20
A21
A22
MA03
加热芯体表面温度传感器
蒸发器表面温度传感器接口
温度模式电机接口
风门模式电机接口
室内外模式电机接口
功率放大器接口
鼓风机继电器接口
鼓风机电机接口
仪表线束接口A
仪表线束接口B
MA03a
A15
A16
A17
A18
A19
A20
A21
A22
MA03
空调线束
空调线束说明
Description of A/C harness
A15 Fan motor connector
A16 Internal/external recirculation mode motor connector
A17 Power amplifier connector
A18 Fan relay connector
A19 Evaporator surface temperature sensor connector
A20 Temperature mode motor connector
A21 Vent mode motor connector
A22 Heating core surface temperature sensor
MA03 Instrument harness connector A
MA03a Instrument harness connector B
A/C harness
