Cautions for electrical technicians using medical electrics
Forbidden operation
Warning：
● There is strong magnetic components on this vehicle
● If technician use medical electrics,e.g electronic pacemakers, which couldn’t be operated in the vehicle ,otherwise,the function of electrics may be effected by strong magnetic components.
Cautions for normal charge
Warning:
● If technician use the medical electrics like pacemakers, cardiovascular, in addition to the top, the machine only could be used after the function of machine checked and confirmed before normally operation.
● In the normal charging operation, Medical electrics may be affected by electromagnetic wave. When Technicians use the medical electrics like pacemakers, cardiovascular, in addition to the top etc, it is not allowed to enter into crew capsule (including luggage).
Cautions for communication equipment
● If technicians use the medical electrics like pacemakers, cardiovascular, in addition to the top etc, please keep enough distance with the communication equipment.
● Remote intelligent terminal of electromagnetic waves may affect the function of the medical electrics like pacemakers, cardiovascular, in addition to the top etc.
● If technicians use the medical electrics like pacemakers, cardiovascular, in addition to the top etc, remote intelligent terminal of electromagnetic waves may affect the function of the medical electrics. It is needed to let the manufacturer of the medial electrics confirm that the possible affection to medical electric equipment when using remote intelligent terminal .
Keypoint checking before maintenance
High pressure system can be run automatically, it is need to confirm that remote air conditioning and recharged regularly are not set before maintenance.
Cautions：
● If set remote air-conditioner or charged regularly, even though the switch is closed, high pressure system can be run automatically.
Cautions for "safety airbag"and"safety belt preloaded"of auxiliary constraint system
The combination use of "safety airbag"and"safety belt preloaded"of auxiliary constraint system and front seat belt could decrease the damage to driver and passengers when collision. The auxiliary constraint system include seat belt, airbag for driver, airbag for co-driver. The detailed information for auxiliary constraint system could refers to the sections of “airbag system” and “seat belt”
Warning:
To avoid unexpected accident, we need to obey the following:
● To avoid the auxiliary constraint system invalid, all the maintenance only could be operated by JAC authorized distributors because the risk of injury to people will be increased after invalid.
● Non-standard auxiliary constraint system of maintenance including non-standard disassembly and installation, may result in auxiliary constraint system accident triggered, causing personal injury accidents. About remove the airbag module method, please see "airbag system" section.
● In addition to the maintenance instructions in the manual operation, do not use electrical test equipment to test any circuit of auxiliary constraint system. Auxiliary constraint system of connectors and wiring harness use yellow or orange color.
Cautions when use electrical tools (pneumatic or electric)and hammer
● when electric switch in the "ON" block, near the airbag diagnostic sensors or other sensor, do not use power tools or hammer to operate sensor parts area. Severe vibration may activate the sensor, some airbags, causing serious damage.
● When using power tools or hammer, put the keys in the "LOCK" block, unplug the 12 v lead-acid battery cathode, waiting at least 1 minute, then for checking and maintenance.
Cautions for removing 12V battery
Turn the key to “on”,then to “lock” before remove 12v battery
Tip:
● Even if the key in the "LOCK" and the 12 v battery charging function may start automatically.
● After turn the key to "ON" --> "LOCK", 12 v battery automatic charging will not start.
Commonly used tools
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Tool |
Diagram |
Instruction |
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Power tool |
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Install and remove bolts and nuts |
This vehicle is equipped with mechanical parking brake system, which is composed of parking handle, left and right parking drawing.
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1 Parking handle |
2 Left parking drawing |
3 Right parking drawing |
4 Circlip |
Tips:
● When pull up parking lever, there is sound "hitched, hitched" , which is the voice of the mechanical mechanism locking,and it is normal.
● When put down the parking handle, need slight lift and press down the button in the front of handle.
Diagnosis and maintenance process
Fault diagnosis process details
1 Collect customer information
Before check, carefully ask customer concerns or driving vehicles together with the customer which is very important for solving the problem.
2 Check symptom
According to the information collected through interviewing with the customer ,reappear information of customer specified symptoms. Check whether the symptoms caused by the failure mode.
Caution:
When symptoms are caused by normal operation, please fully inspect each related parts and let customers understand the symptoms are normal.
3 Repair or replace defective parts
① Repair or replace defective parts
② re-assembly and connect after repairing or replace defective parts
4 Confirm the symptoms disappear
If symptoms disappear, meaning complete the maintenance. If not, then return to step 3.
Diagnostic work list
In general, customers have their own judgment standard to a problem. Therefore, careful enough to ask to understand customer's concern is very important. Preparing interview list make diagnostic information systematic. Some times, many conditions occur at the same time resulting in failure.
Interview list sample
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Interview list |
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Customer name |
Gender |
Plate No |
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Original registered date |
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Model |
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VIN |
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Production date |
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Motor power |
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Mileage |
km |
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Fault conditions |
Fault type |
□Unable to parking □Unable to release □Abnormal noise □Unable to parking when braking □Still brake after release □handle button couldn’t be out □Parking light not on when pull up parking handle □Parking light is always on □ Parking light flashing |
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Detailed symptom |
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Detailed abnormal noise |
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Shift |
□R □N □D |
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Safety belt |
□With □Without |
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Brake pedal status |
□NON Step □Step |
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Parking handle status |
□Status of putting down the parking handle □Pulling up the parking handle □Putting down the parking handle □Braking □Continuous |
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Vehicle status |
□Key LOCK □Key ACC □Key ON □READY |
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Vehicle moving status |
□Start in shift D □Drive in shift D □Parking in shift D □Start in shift R □Drive in shift R □Parking in shift R □Parking in shift N □Drive with slow speed □Drive with high speed |
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Road conditions |
□Steep downhill □Slow down □Flat Road □Slowly uphill □Steep uphill |
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Passengers |
□5 □4 □3 □2 □1 |
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Vehicle loading conditions |
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Check result |
Check result |
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12V battery status |
□Normal □Abnormal（ ） □Pending |
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Connectors status |
□Normal □Abnormal（ ） □Pending |
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Parking drawing status |
□Normal □Abnormal（ ） □Pending |
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Brake shoe status |
□Normal □Abnormal（ ） □Pending |
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Parking handle status |
□Normal □Abnormal（ ） □Pending |
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Other status |
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Remove
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1 Remove the rear part assembly of vice dashboard. 2 Loose adjusting nut, remove left and right parking drawing.
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3 Pull down parking handle connector, remove the fixing bolt of parking handle. ● Tightening torque：20～25N·m
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4 Remove rear wheel, please see “wheel- wheel assembly. 5 Remove rear brake drum, please see “braking system- rear brake”. 6 Separate parking drawing and rear brake. |
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7 Remove the fixing bolt in the front part of parking drawing. ● Tightening torque：7～11 N·m
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8 Remove the fixing bolt in the middle part of parking drawing. ● Tightening torque：7～11 N·m
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9 Remove the fixing nut in the rear part of parking drawing, remove parking drawing. ● Tightening torque：7～11 N·m
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● Check whether the parking handle button ① is flexible and return normally, if not flexible or couldn’t return back, please replace. ● Checking whether the ratchet ② of parking handle wear. If yes, please replace. ● Check whether there is deformation, wear, distortion, or other damage for parking drawing . If yes, please replace. |
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Install in the opposite side of remove. Check and adjust parking handle stroke. Please see “maintenance- parking system”
Caution:
● Fix after adjusting parking drawing to smooth.