Diagnosis Of Vehicles After Collision; Diagnosis, With The Deployment Of Air Bag; Diagnosis, Without The Deployment Of Air Bag - Lifan 620 Maintenance Manual

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Section III Diagnosis of Vehicles after Collision
Check and maintain the vehicles after collision even without the deployment of air bag. Refer to
Section IV for related methods of removal and installation.
I. Diagnosis, with the deployment of air bag
1. In the case that the air bag of the vehicle has been deployed after a collision, carry out a system
fault diagnosis according to the methods in Section II. Renew the following Components.
(1) Air bag ECU.
(2) Driver air bag module.
(3) Front passenger air bag module.
(4) Driver safety belt pre-tesioner module.
(5) Front passenger safety belt pre-tensioner module.
Note: The old air bag ECU, driver air bag module, front passenger air bag module, driver safety
belt pre-tensioner module and front passenger safety belt pre-tensioner module removed are
required to be recovered.
2. Check the following components. Renew as required.
(1) Clock spring. Check the interface and harness of the clock spring for damage and the circuit
performance of the clock spring as per 2.3.10. Renew as required.
(2) Steering wheel, steering column and steering lower shaft components. Check the steering
wheel, steering column and steering lower shaft components for distortion and anything abnormal.
Repair or replace if necessary.
(3) Harness. Check the harness of the air bag for firmness, the harness and interface for damage,
and the terminal for distortion. Renew as required.
II. Diagnosis, without the deployment of air bag
In the case that the air bag of the vehicle has not been deployed after a collision of low speed,
carry out a system fault diagnosis according to the methods in Section II and check the following
components.
1. Air bag ECU. Check the air bag ECU box and bracket for depression, crack and distortion, the
interface for damage and the terminal for distortion. Check the air bag ECU for normal installation.
Renew if necessary.
2. Driver air bag module. Check the ornamental cap for depression, crack and distortion, the
harness and interface for damage and the terminal for distortion. Also check the gas generator
housing for depression, crack and distortion, the pushbutton switch contact piece of the steering
wheel horn for distortion. Check the module for normal installation. Renew if necessary.
3. Front passenger air bag module. Check the ornamental cap for depression, crack and distortion,
the harness and interface for damage and the terminal for distortion. Also check the gas generator
housing for depression, crack and distortion. Check the module for normal installation. Renew if
necessary.
4. Driver safety belt pre-tensioner. Check the pre-tensioner for depression, crack and distortion,
the harness and interface for damage and the terminal for distortion. Check the pre-tensioner for
normal installation. Renew if necessary.
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