PEPS System

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System Summary

Passive Entry & Passive Start (PEPS) means a keyless entry and keyless entry system that uses

state-of-the-art RFID radio frequency technology and a vehicle identification code recognition system to

provide a comfortable and completely new driving experience with user-friendly convenience.

PEPS mainly includes the PEPS controller (PSE), the smart key (ID), start button, low frequency

antenna inside the vehicle (LF), a spare antenna, doorknob antennas (HSU), electronic steering column

lock (ESCL) and other components.

．

System Components

Component name

Quantity

Remark

PEPS controller 1

LF antenna inside 2 Used to search function for smart key in vehicle

Spare antenna 1

Used to emergency start when key battery has no power, and

matching learning of smart key

Door handle antenna and switch 2 used to low-frequency research for smart key outside vehicle

Button-type ignition switch 1

It is HMI tool of PEPS, used to start and stop of vehicle and

power state switching

PEPS controller bracket 1 Used to fix PEPS controller

LF antenna bracket 3 Used to fix LF antenna

ESCL 1

Similar with common ignition switch lock function, lock

steering column after stopping vehicle, improve anti-theft

function

ESCL snap ring 1 used to coordinate fixing of ESCL

Smart key

HMI tool of PEPS system

1、PEPS controller:

PEPS controller is the key of PEPS system, in charge of communicate with other system and

perform corresponding movement. Also PEPS controller is power management system, in charge of

vehicle power state management, ACC and ON power supply is from PEPS controller.

2、Internal LF antenna:

It’s inside LF signal transmitting tool of PEPS system, it’s used to search function for smart key in

vehicle.

3、Spare antenna:

It’s used to emergency start when key battery has no power, and matching learning of smart key.

4、Door handle integrated sensor:

It’s used to low-frequency research for smart key outside vehicle.

5、Start button:

It is HMI tool of PEPS, used to start and stop of vehicle and power state switching.

6、ESCL:

ESCL function is similar with common ignition switch lock function, lock steering column after

stopping vehicle, improve anti-theft function.

7、Smart key:

Smart key is HMI tool of PEPS system. (1) LF communicate with PEPS controller by door handle

LF antenna, rear bumper LF antenna, and start key authorization by HF, to realize passive enter; (2) LF

communicate with PEPS controller by inside LF antenna, ensure key position and authorization, and start

key authorization by HF, to prepare for passive start.

III

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Relationship of PEPS and other systems

1、PEPS&ESC: PEPS receives CAN-bus wheel speed signal, vehicle speed signal and hard-wire wheel

speed signal to judge the vehicle is running or static.

2、PEPS&EMS：PEPS receives the signal of engine speed, coolant temperature, starting request and so

on to realize the IMMO authentication, start-stop function etc.

3、PEPS&ICM：PEPS exchanges information with ICM, especially alarming signal and information

displayed on ICM. As the gateway of CAN-bus, ICM transfers signal from EMS, TCU, ESC and so on.

4、PEPS&BCM： PEPS exchanges information with BCM, especially to realize door lock&unlock and

power window function.

5、PEPS&TCU：PEPS receives gear position signal from TCU to judge gear position as system operation

condition.

6、PEPS&Brake Switch：As auto transmission model, PEPS receives brake pedal signal from brake

switch as system operation condition.

7、P/N Swtich：Provide P gear position signal as power OFF necessary condition.

8、P/N Swtich or PN Relay：Provide P or N gear position signal as starting necessary condition. And P

gear position signal is needed for engine turn off.

Component position:

System principle diagram

．

PEPS System Function Introduction

1. Passive Entry (PE):

(1) Unlock function: when pressing door handle, door handle antenna activates key and PEPS controller

authorization, if the authorization is successful, smart key entry function can realize, and PEPS will send

unlock request to BCM, vehicle door will be unlocked.

Note:

sta

rt button and spare antenna

Smart key

LF antenna*3

Rear bumper LF antenna

Door handle switch

Door handle

antenna and button

PEPS controller

ESCL

Smart key

ESCL

control

ler

PEPS controller

ESCL

Inside LF

antenna

(front)

Inside LF

antenna

(rear)

Right front door

handle antenna

Left front door

handle antenna

Tail door

opening button

Bumper

antenna

Start button

Brake pedal

P gear position switch

Spare antenna

ACC relay

IG1 relay

IG2 relay

Starting relay

P/N relay

TCU

controller

Combination

meter

Engine ECU

BCM

LIN bus

CAN bus

Hard wire wheel speed

ABS controller

Diagnosis

Door lock motor

Inside LF

antenna

(middle)

Smart key

LF detecting area

a) Keyless unlock: after remote control operation unlock doors to release vehicle alert state, please

operate open door move within 30s, or else all doors (include tail door) will automatically be locked

(improve anti-theft safety).

b) Keyless unlock function limit: in the following conditions, unlock function can’t work normally:

① After unlock by pressing inching switch on outside door handle, press inching switch again within

1.5s and not operate unlock movement, to check whether vehicle door is locked;

② After lock vehicle by central control door lock, keyless function will be forbidden (improve safety)

③ After lock vehicle by remote control inside vehicle, keyless function will be forbidden (improve

safety)

④ After lock vehicle by mechanism key, keyless function will be forbidden (improve safety)

⑤ When there is legal key inside vehicle, use the other key to operate keyless lock outside the vehicle,

vehicle will be automatically unlock, and with warning indicating.

(2) Lock function: after all doors are closed, when pressing door handle inching switch, search whether

there is key besides the door handle; if no, can’t lock; if any, perform key authentication and detect

whether there is key in the vehicle. When there is no key inside the vehicle, PEPS controller will send

lock request to BCM, vehicle door will be locked.

Note:

a) When vehicle left front door is not closed well, vehicle don’t perform lock movement. If other three

doors are not closed well, press door handle button, vehicle can be locked, but not in anti-theft state, and

get into anti-theft state after all doors are closed well.

Trunk lock/unlock function: when pressing trunk button, search if there is key outside trunk; if no, can’t

unlock; if any, judge whether can detect the key inside vehicle at the same time; if not detected the key,

PEPS will send unlock request to BCM, and trunk will be unlocked.

Note:

a) When key is in trunk, and close trunk by hands, vehicle will release anti-theft immediately, and four

doors unlock with warning indicating sound. Press trunk unlock button, trunk will be open.

2. Passive Start (PS):

Engine on/off: press brake pedal, inside LF antennas start to search key, smart key sends authorization

information; if P gear position switch or P/N relay state is valid, start button is green; press start button,

ESCL will be unlock, PEPS controller and EMS start IMMO authorization; after authorization, PEPS

controller outputs relay control signal, vehicle starts; after starting, starting relay is off and other relay on

(starting protection)

Note:

a) If key is in dashboard or other corner place, even there is key, it maybe can’t perform authorization.

(Because it is beyond vehicle detecting area).

b) After vehicle inside authorization, vehicle/key stops sending signal (next authorization is when

opening door).

c) When vehicle driving, except emergency parking, start button will not activate starting relay on if it is

touched.

3. Emergency starting (when key battery is low): place key in spare antenna, press brake pedal, shift to P,

after start button is green, and then press start button (→engine start). Brake when SW switch to ON,

PEPS controller starts ensure key authorization condition inside vehicle. If not detected key inside

vehicle, PEPS controller will activate spare antenna, and start authorization with key by the spare

antenna. If authorization is successful and gear position is P, start button is green. After pressing button,

PEPS controller will start authorization with engine ECU and ESCL. After authorization successful,

ESCL will be unlock, and engine starts.

Note:

a) Must place key in specified position, or else it maybe can’t detect the key.

b) Power supply state switching:

1、With key, P gear position, not press brake pedal→ press start button for a short time →power supply

switch between ACC/ON/OFF each time pressing the start button;

2、When gear position is not in P, can’t power off.

c) Passive start:

1. When starting engine, press start button not more than 10s.

2. P gear position, not press brake pedal, and press starting switch 15s, can start vehicle for emergency.

3. In the following conditions, passive start may not work normally: smart key is not inside vehicle;

smart key battery is too low; when there is a facility nearby that releases strong electromagnetic

interference, such as television towers, power stations, broadcasting stations, etc.; smart keys are in

contact with or covered with metal objects.

d) Engine off:

1. Press start button for 3s or continuously press start button 3 times within 3s, engine can be off for

emergency.

2. When vehicle is running, power off will lose steering power.

3. PEPS remote control function:

Remote control lock: all doors are closed→ press lock button for a short time → doors are locked, turning

light will twinkle once

Remote control unlock: press unlock button for a short time → doors are unlocked, turning light will

twinkle twice

Search vehicle: press searching vehicle button for a short time →turning light will twinkle and horn is on

Remote control window up (if equipped): press lock button for a short time to get into alert state→ press

lock button for a long time to automatically lift window

Remote control window down (if equipped): press unlock button for a short time to release alert state→

press unlock button for a long time to automatically window down

Note:

a）Remote control lock: when vehicle left front door is not closed well, vehicle don’t perform lock

movement. If other three doors are not closed well, press lock button on remote control key, vehicle can

be locked, but not in anti-theft state, and get into anti-theft state after all doors are closed well.

b）Remote control unlock: after remote control operation unlock doors to release vehicle alert state,

please operate open door move within 30s, or else all doors (include tail door) will automatically be

locked

c）Remote control window up (C2): during remote control window up, you can press any button on

smart key to stop window up; and you can press lock button on smart key again to complete window up

request.

d）Remote control window down (C2): during remote control window down, you can press any button

on smart key to stop window down; and you can press lock button on smart key again to complete

window down request.

e）Remote control limit: when power not OFF (in ACC or ON), remote control function can’t work

normally.

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Installation Position of Components

1. PEPS controller and bracket position

On left side of dashboard column beam

2. Inside LF antenna

Front LF antenna is in rear side of blower, middle LF antenna is below rear row seat, rear LF antenna is in

rear bumper

3. Spare antenna

In the bottom of front cup support of auxiliary dashboard

4. Door handle integrated sensor

In left front door handle

Spare antenna

Cup support of

upper trim panel of

auxiliary dashboard

5. Start button

In dashboard, right side of steering wheel

6. ESCL and clamp ring

In steering column

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System Principle Diagram

CVT model system principle diagram

按键式点火开关

Start button

Steering column

ESCL

lock

ESCL lock

clamp ring

VII

．

Component Detection

Connector pin definition:

Start button

No. Description Remark

1 SS1 Starting button signal 1

2 GND Starting button -

3 SS2 Starting button signal 2

4 SWIL Starting button backlight (white)

5 INDG Starting button backlight (green)

6 INDA Starting button backlight (amber)

Spare antenna

No. Description Remark

1 ANT+ Antenna +

2 ANT- Antenna -

Inside LF antenna

No. Description Remark

1 ANT+ Antenna +

2 ANT- Antenna -

Door handle integrated sensor

No. Description Remark

1 ANT+ Antenna +

2 ANT- Antenna -

CVT model PEPS controller connector pin definition

PEPS controller

No. Description

J1-1

Connecting to battery +

J1-2

IG1 relay driving - high

J1-3

ACC relay driving - high

J1-4

IG2 relay driving - high

J1-5 High speed CAN_L

J1-6 High speed CAN_H

J1-7 Vehicle speed signal

J1-8 -

J1-9 -

J1-10

Starting relay driving diagnosis

J1-11

Ignition signal input

J1-12

Brake light switch signal (AT)

J1-13

Starting relay input

J1-14 P gear position switch signal (AT)

J1-15 -

J1-16 Vehicle GND

J2-1 Transponder antenna (+)

J2-2 Transponder antenna (-)

J2-3 Start button backlight Run/Start

J2-4

Start button backlight

J2-5

Start button backlight ACC/IG

J2-6

Front internal antenna -

J2-7

Middle internal antenna -(reserved)

J2-8

Middle internal antenna +(reserved)

J2-9 Anti-theft coil shielding wire

J2-10 Start button (simulation grounding)

J2-11 Start button (1)

J2-12 -

J2-13 Start button (2)

J2-14 Front internal antenna +

J2-15

Rear internal antenna -

J2-16 Rear internal antenna +

J3-1 Tail door passive entry unlock switch

J3-2 (Left) Door handle integrated sensor HPS_H_2 (reserved)

J3-3 (Left) Door handle integrated sensor HPS_H_1 (reserved)

J3-4

Rear bumper LF antenna -

J3-5

Trunk lock switch (reserved)

J3-6

(Right) Door handle integrated sensor HPS_L_2 (reserved)

J3-7

(Right) Door handle integrated sensor HPS_L_1 (reserved)

J3-8

Rear bumper LF antenna +

J4-1 ESCL (switch -)

J4-2 -

J4-3 ESCL (power -)

J4-4 ESCL (LIN)

J4-5 -

J4-6

ESCL (power +)

J4-7

J4-8

Vehicle grounding

J4-9

J4-10

Non IG1 power supply output

VIII

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Component Replacement

8.1 Removal of PEPS controller

a) Disconnect battery negative electrode;

b) Remove dashboard panel;

c) Disconnect PEPS controller connector;

d) Remove bolts fixed PEPS controller bracket;

e) Take down PEPS controller and its bracket.

8.2 Removal of inside LF antenna

8.2.1 Removal of front LF antenna

a) Disconnect battery negative electrode;

b) Remove dashboard panel;

c) Disconnect front LF antenna connector;

d) Take down LF antenna from rear side of blower.

8.2.2 Removal of middle LF antenna

a) Disconnect battery negative electrode;

b) Remove rear panel of auxiliary dashboard;

c) Disconnect middle LF antenna connector;

d) Take down the antenna from bracket.

8.2.3 Removal of rear bumper LF antenna

a) Disconnect battery negative electrode;

b) Remove rear bumper;

c) Disconnect rear LF antenna connector;

d) Take down antenna from rear bumper.

8.3 Removal of spare antenna

a) Disconnect battery negative electrode;

b) Remove auxiliary dashboard;

c) Disconnect spare antenna connector;

d) Take down spare antenna from the bottom of storage box.

8.4 Removal of door handle integrated sensor

a) Disconnect battery negative electrode;

b) Remove internal door panel of front door;

c) Remove front door handle;

d) Disconnect door handle integrated sensor connector;

e) Take down the sensor from door handle.

8.5 Removal of start button

a) Disconnect battery negative electrode;

b) Remove dashboard housing;

c) Disconnect start button connector;

d) Take down start button from panel.

Rear bumper

Rear LF antenna

Spare antenna

Cup support of

upper trim panel of

auxiliary dashboard

8.6 Installation of each component

Install according to the contrary sequence of removal.

．

Maintenance Caution

ICM indicating phase and maintenance method

No. ICM indicating phase Check object

1 Please shift to P

1. Check whether gear shifting lever is in P;

2. Check whether there is gear position information on internet;

3. Check whether TCU has failure;

4. Check whether wiring harness of P/N relay is conductive (P/N relay is

in inside electrical box)

2 Please power OFF

Ensure power is OFF

3 Key is not inside vehicle

Function indicating, key is not detected inside vehicle

4 Please replace smart key

When key has no power, put key in rear cup support and start, it will

indicate this

5 Key not detected

Function indicating, not detect key inside vehicle

6 Key low battery

Replace key battery

7 ESCL not unlocked

1. Rotate steering wheel and try to unlock

2. Read PEPS fault code, and remove the failure according to DTC

8 Please press brake pedal

Function indicating, can start after pressing brake pedal

9 Please rotate steering wheel

After ESCL can’

t be unlocked, it will indicate this, and then try to

unlock

10 Please press start button

Function indicating

Vehicle speed or ESCL

failure, vehicle can start “N”

times

1. Check whether ESCL has failure, read PEPS fault code

2. Check whether ABS (ESC) is normal, read DTC

3. Check whether wheel speed sensor has failure

4. Check whether wiring harness of PEPS controller J1-7 is conductive

5. After failure is locked, operate reset starting times process by scanner

(Note: if the vehicle needs a power-up check to perform the PEPS reset

Start button

Steering column

ESCL

lock

ESCL lock

clamp ring

No. ICM indicating phase Check object

startup times directly, the startup problem can be solved at this point, but

it is important to find out the cause of the decrease in the number of

startup times, and if the reason is not identified, the vehicle will also

have this problem again. )

12 ESCL failure

Please replace ESCL module immediately

Maintenance caution

Module

Operation

Caution

ESCL

Clear ESCL When clear ESCL, ensure vehicle is OFF normally

Learning ESCL When learning ESCL, ensure vehicle is OFF normally

Replace ESCL

1. Must replace new ESCL, don’t exchange with other vehicle, or

else, vehicle will not be power on.

2. After replacing ESCL, new ESCL can start vehicle, but you

must do learning ESCL

Replace PEPS controller

When replacing PEPS controller, must replace new PEPS

controller, don’t exchange with other vehicle, or else, ESCL will

be self-protection locked

ESCL installation

When installing ESCL, ensure the installation is correct

Smart key

Delete all keys

Don’t use as possible. After delete all keys, old key must do add

old key and then add new key, or else, the key may not be added.

Add old key

Ensure the added key is in rear backrest when adding old key, and

other keys not inside vehicle.

Add new key

Ensure the added key is in rear backrest when adding old key, and

other keys not inside vehicle.

Caution:

Don’t reset EMS, PEPS at the same time, or else ESCL and key won’t be used again, needing to

replace module.

When ICM indicating vehicle can start “N” times, after the fault is locked, operate reset starting times

process by scanner. (if the vehicle needs a power-up check to perform the PEPS reset startup times

directly, the startup problem can be solved at this point, but it is important to find out the cause of the

decrease in the number of startup times, and if the reason is not identified, the vehicle will also have this

problem again.)

．

DCT List

DTC meaning and solutions

No. DTC DCT meaning Solution

1 U0073 CAN bus off

1. Check whether CAN bus communication is normal;

Check whether related module wiring harness is normal

or damaged

2 U0155 Lost communication of ICM

3 U0100 Lost communication of ECM

4 U0129 Lost communication of ABS

5 U0140 Lost communication of BCM

6 U0329 Lost communication of ESCL

Check whether wiring harness of ESCL power supply,

grounding, Lin bus is conductive

7 U1300 Software configuration error Replace PEPS controller

8 B1500

Open circuit of driver’s door

outside LF antenna

Check whether wiring harness of driver’s side door outside

LF antenna is conductive (antenna is inside door handle)

9 B1501

Open circuit of front

passenger’s side LF antenna

10 B1502

Open circuit of front internal

LF antenna

Check whether wiring harness of front internal LF antenna

is conductive (black antenna located in lower side of central

control switch group)

11 B1503

Open circuit of middle internal

LF antenna

Check whether wiring harness of middle internal LF

antenna is conductive (black antenna located below carpet

in the middle position below rear seat)

12 B1504

Open circuit of rear internal

LF antenna

13 B1505

Open circuit of rear bumper

internal LF antenna

Check whether wiring harness of rear bumper internal LF

antenna is

conductive (black antenna located on

anti-collision beam inside of rear bumper)

14 B1506 Abnormality in start button Check whether wiring harness of start button is conductive

15 B1507 Abnormality in IG circuit Check IG1 relay and wiring harness of IG1 relay

16 B1508 Abnormality in ACC circuit Check ACC relay and wiring harness of ACC relay

17 B1509 Abnormality in brake signal

Check whether brake system is normal, if any, please

remove the failure; after there is no abnormality, clear

PEPS fault code

18 B150A

Abnormality in vehicle speed

signal

1. Check whether vehicle speed signal on CAN bus is

normal

2. Check whether ABS is normal

3. Check whether wheel speed sensor is normal

19 B150C Abnormality in clutch signal

Check whether clutch switch is normal, whether wiring

harness is conductive

20 B150D

Abnormality in ESCL

LCK_GND signal

Check whether grounding wiring harness of ESCL is

conductive

No. DTC DCT meaning Solution

21 B150E

Abnormality in ESCL

LCK_PS signal

1. Check whether ESCL power supply wire is conductive

2. When vehicle is OFF, check whether there is 12V power

supply input in PEPS J4-

10; if there is 12V power supply,

it’s normal; if not, please check IG1 relay circuit

Check whether circuit wiring harness of ACC, IG2, IG1

is conductive

22 B150F

ESCL enter into

self-protection mode

1. Clear ESCL instruct by scanner (the instruct needs 15min

to operate, and vehicle must be OFF)

After step 1, use scanner to operate learning ESCL

(vehicle must be OFF during the process)

23 B1510

Abnormality in wheel speed

signal

1. Check whether wheel speed sensor is normal

2. Check whether wiring harness of PEPS J1-

7 is

conductive

24 B1511 Abnormality on ESCL lock

1. Rotate steering wheel, and then try to lock ESCL

2. Use scanner to operate clearing ESCL (the instruct needs

15min to operate, and vehicle must be OFF)

After step 1, use scanner to operate learning ESCL

(vehicle must be OFF during the process)

25 B1512 Abnormality on ESCL unlock

26 B1513

Abnormality on ESCL DTC

return value

27 B1514 Abnormality on starting output Check whether wiring harness of starting relay is normal

28 B1515 ROM check failure Replace PEPS controller

29 B1300

PEPS internal EEPROM

module error

Replace PEPS controller

30 B1301

IMMO and ECM

authentication failed

1. Check whether has replaced engine ECU. If replaced,

operate “replace engine ECU” process

2. Check whether has replaced PEPS controller. If replaced,

operate “replace PEPS” process

3. Check whether has replaced ICM controller. If replaced,

ensure whether the ICM controller is right

31 B1302 VIN not programmed

PEPS controller is not matched, match PEPS controller

again

32 B1303

Spare antenna communication

is invalid

Check whether spare antenna wiring harness is conductive

(spare antenna is in lower side of backrest on auxiliary

dashboard)

33 B1304 None transponder is detected Check whether key is inside vehicle

34 B1305 No key in IMMO was stored

PEPS

controller is not matched, match PEPS controller

again

35 B1306

Security code was not

programmed

36 B1516 HSU overload invalid Replace door handle antenna

37 B1517 HSU switch invalid Replace door handle antenna