Electric Horn
Precautions for the technician who uses a medical electric device
Key Part Check before Maintenance and Repair
Precautions for removing 12V battery
Precautions for the technician who uses a medical electric device
Operation Prohibition
Warning：
This vehicle uses strong magnetic components.
If a technician uses the electronic medical devices such as the electronic pacemaker, the electronic device can not be operated on the vehicle as the function of the electronic device may be affected by the strong magnetic components.
Normal charge precaution
Warning：
If a technician uses a medical electric device such as an implantable cardiac pacemaker or an implantable cardioverter defibrillator, the possible effects on the devices must be checked with the device manufacturer before starting the charge operation.
As radiated electromagnetic wave generated by on board charger at normal charge operation may effect medical electric devices, a technician using a medical electric device such as implantable cardiac pacemaker or an implantable cardioverter defibrillator must not enter the vehicle compartment (including trunk) during normal charge operation.
Precaution at telematics system operation
If a technician uses implantable cardiac pacemaker or implantable cardioverter defibrillator (ICD), avoid the device implanted part from Communication device.
The electromagnetic wave of TCU might affect the function of the implantable cardiac pacemaker or the implantable cardioverter defibrillator (ICD), when using the service, etc.
If a technician uses other medical electric devices than implantable cardiac pacemaker or implantable cardioverter defibrillator (ICD), the electromagnetic wave of TCU might affect the function of the device. The possible effects on the devices must be checked with the device manufacturer before TCU use.
Key Part Check before Maintenance and Repair
Check the high-voltage system, and ensure the high-voltage system is powered off before starting the maintenance work, and disconnect the battery switch.
If the timer air conditioner or timer charge is set, the high voltage system starts automatically even when the power switch is in OFF state.
Supplemental Restraint System (SRS) "Air Bag" and "seat belt pre-tensioner" are used on the front seat belts, which can help to reduce the dangers or serious injury of the driver and the front passenger in certain type of collisions. The relevant information of safe usage of the system is included in the SRS and Safety Belt Section of the Service Manual.
Warnings:
In order to prevent accidents, please follow the below points：
Avoid the deactivation of SRS. Its failure will increase the personal injury caused by the airbag collision in the major collision accident. All the repairs must be done by the authorized dealer of JAC.
Improper repair, including wrong removal and installation of SRS system, will make the system unable to activate and cause personal injury. Regarding the spiral cable and airbag modules, please refer to "SRS AIR BAG".
Unless it is allowed in Service Manual, please do not use the electronic test equipment on the relevant circuit of SRS. The harness of SRS uses yellow or orange harness or harness connector, which can be easily recognized.
Precautions for using power tools (air or electric power) and hammers
When the power switch is turned on, do not use the pneumatic or electric tools or hammer to hammer the surrounding areas of the airbag diagnostic sensor or airbag system sensors. Strong vibration may activate the sensors and unfold the air bag, which will cause serious injuries.
When using the pneumatic or electric tools or hammer, please switch off the power always, unplug the 12V lead-acid battery pile head, and wait at least 1 minute and then repair.
Precautions for removing 12V battery
Before removing the 12V battery, please turn the power switch to the ON position, then turn to the OFF position.
Tips:
When the power switch is on OFF position, the automatic charging control system of the battery may start.
When turning the power switch from ON position to OFF position, the automatic charging control system of the battery will not start.
Common Precautions
Before the serving, which is not need to use the power supply: turn the power switch to LOCK position, disconnect the 12V storage battery negative terminal.
After disconnecting 12V storage battery negative terminal, the storage memory of radio and other control devices will be deleted.
Replace the new oil seal, pad, seal ring, O-ring, lock-up gasket, split pin, self-locking nut and other components.
Place the removed components according to the assembly-oriented position and order.
If necessary, use authorized binder、sealant or equivalent product.
In order to repair the vehicle safely and efficiently, right use of hand tools、power tools(only for removal) and special tools is necessary.
Before Servicing：
Use suitable cover to cover the wheel fender、interior and carpet. Attention, do not use the key、fastener or the like to scratch the paintwork.
Commonly used service tools
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Tool |
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Instructions |
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Power Tool |
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Install and Remove the bolts and nuts |
The control method of horn is to control delivery point, the pick-up of horn relay is controlled by horn switch or body controller, then power is delivered from relay to horn, thereby the horn works. The horn is always grounding.
(1) List of Malfunction Diagnosis
1. Check after-sales installation device that may have influence on horn operation.
2. Check the system components that are easier to be contacted or visible to confirm that whether there is obvious damage or condition that may lead to malfunction.
3. If the horn does not work, before replacing the horn, check and repair the bad contact or disconnection malfunction of power supply or switch ground circuit.
4. As the horn does not work discontinuously or the horn switch on either side of steering wheel is out of work, it is most likely to be bad contact of horn switch contact, at this moment, the horn switch contact in the steering wheel should be adjusted.
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No |
Malfunction Phenomenon |
Malfunction Cause Analysis |
Countermeasures |
Remark |
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1 |
Horn does not work |
Horn relay malfunction |
Replace horn relay |
Refer to Horn Does Not Work |
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Power supply fuse malfunction |
Replace fuse |
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Horn contact malfunction |
Adjust horn contact |
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Clock Spring Malfunction |
Replace clock spring |
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Power circuit malfunction of horn |
Check relevant circuit |
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Grounding circuit malfunction of horn |
Check relevant circuit |
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Horn Malfunction |
Replace horn |
（II）Flow Chart of Malfunction Diagnosis
Horn Does Not Work
Removal
1. Open front compartment cover
2. Disconnect battery negative cable. Refer to Disconnection and Connection of Battery Cable
3. Remove front shield of engine. Refer to Front Shield of Engine
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4. Remove front wheel cover. Refer to Front Wheel Cover 5. Remove top plate of front bumper 6. Remove front bumper assembly 7. Remove tweeter assembly 1) Disconnect harness connector ① of tweeter assembly 2) Remove one fixed bolt ② of tweeter assembly 3) Take down tweeter assembly |
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Installation
1. Install tweeter assembly
1) Place tweeter assembly in installation position, tighten up one fixed bolt ② of tweeter assembly
2) Connect harness connector ① of tweeter assembly
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2 Install front bumper assembly 3 Install top plate of front bumper 4 Install front wheel cover 5 Install front shield of engine 6 Connect battery negative cable 7 Close front compartment cover
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