Chery A15. Manual — part 158

Chery A15 Maintenance Manual

1. Current fault.

2. Historical fault.

(5). Warning Light

. Warning light will be turned on once a fault is detected.

. And keeps “ON”.

(6). Wire Harness

Most of the wire harness connectors of airbag system are yellow-colored.

V. Fault Diagnosis and Maintenance

1. Check with SRS Diagnostic system

When the SRS is powered on, airbag BCM will turn on warning light and start a

self-checking, during which the warning light will flash for 6 seconds with a

frequency of 1Hz. Any fault detected by BCM will activate airbag warning light, and

the fault will be stored to BCM memory. BCM will check SRS fault each time it is

powered on.

A fault will be marked by SDM if it is detected consecutively for five times. A fault

diagnosis testing cycle lasts for 400ms, therefore it takes SDM 2 seconds (400ms X 5

times) to confirm a fault. If a marked fault continues, the warning light will keep on,

this is called a “current fault”. If a marked fault does not appear in the following 25

consecutive testing cycle (400ms X 25 = 10 seconds), it will be unmarked, this is

called a “historical fault”.

2. Diagnose with Diagnoser

Diagnoser reads data in BCM memory for continuous data communication. A

diagnoser is able to read fault code in memory and clear part of stored data after

maintenance, but is unable to clear internal faults such as collision record and

arithmetic data fault.

To properly operate the diagnoser, first turn off ignition switch, and connect diagnoser

with OBDII connector, then turn on ignition switch. Next steps please refer to

instruction manual of diagnoser.

Chery A15 Maintenance Manual

Section Three: SRS Maintenance and Service

Auxiliary system inspection or collided vehicle inspection shall be carried out in

accordance with following procedure. Any defected part shall be replaced with new

one.

I. SRS

Warning: In case engine is stopped and fuse is taken off, the BCM will provides

sufficient voltage for 1 minute to activate airbag. If airbag is still connected, do not

start maintenance operation within one minute after power supply to BCM is switched

off. If airbag is disconnected, the maintenance may be started right away without

waiting for 1 minute to be discharged. Any failure in temporary disconnection of SRS

during maintenance will result in mistrigger of airbag, personal injuries and critical

SRS damages.

1. Disconnecting Airbag

Turn steering wheel to central position, turn ignition switch to locked position and

take out the key, then take out airbag fuse from fuse box and wait for at least 1 minute

to discharge BCM capacitor.

2. Connecting Airbag

Insert airbag fuse into fuse box, turn ignition switch to on position, airbag indicator

light will be turned on for 6 seconds and then goes out. If the indicator light does not

work in accordance with the foregoing, please refer to “Check with SRS Diagnostic

System” part of this manual.

Warning: Keep away from airbag when turning on ignition switch to avoid personal

injuries.

3. Operation, Installation and Diagnosis

Airbag shall not be placed in ambient temperatures higher than 65ºC (149ºF). After

falling from a height of 0.9 meter (3 feet) or higher, the airbag and BCM shall not be

Chery A15 Maintenance Manual

used again.

When replacing BCM, the arrow on BCM shall always point to forward direction of

vehicle.

BCM must be installed horizontally on the installing surface, and must be parallel to

vehicle body coordinate axes.

To avoid diagnostic fault code, do not supply power to airbag before all system

components are properly connected. Or the airbag shall be powered in accordance

with special requirements of diagnoser if any.

Any SRS system diagnosis must be started with SRS diagnostic system. SRS

diagnostic system inspection will check for correct indicating functions and select

correct method to diagnose any SRS fault. Omission of this step may result in longer

diagnostic hours or inaccurate part replacement.

4. Repair and Check after Accident

Warning: any repair of vehicle structure shall resume the original shape. For triggered

airbag, BCM and airbag shall be replaced with measurement of steering post

dimension.

Any damaged SRS part or mount point must be replaced.

Never use SRS parts from other vehicles (except new SRS parts from the vehicle of

the same model).

Do not try to repair hairspring, airbag and safety belts. Should any defect be found,

these parts must be replaced.

Check replaced SRS part number or marks. Airbag gas generator with the same look

may have a different internal structure.

5. Replacing Airbag Parts after Activation in Accident

All SRS parts must be replaced after airbag is activated in a collision accident.

Powder-like residue may be found on airbag surface after activation, which may

include cereal starch and products of chemical reaction (used to lubricate airbag when

inflating).

Airbag

Airbag

Chery A15 Maintenance Manual

SRS wire harness

6. Checking Airbag Parts after Inactivation in Accident

The airbag must be checked after any collision accident, whether it is activated or not.

Steering post must be measured for dimensions.

Check dashboard and steering post cover for crack and other damages.

Check dashboard support for deformation, bend, crack or other damages.

Check safety belts and their fixing points.

7. Activating Airbag (inside vehicle)

Always activate an airbag before it is scrapped. If the whole vehicle is disposed of and

disassembled, the airbag may be triggered inside the vehicle.

8. Disposal of Activated Airbag

Warning: Please take following precautions to avoid activation of airbag inside

vehicle and consequential injuries.

Remove all movable or loose parts within spreading coverage of airbag before

activating airbag.

Activate and spread the airbag with doors closed and side windows open.

Spread the airbag only in the reserved spreading area. All necessary maintenance staff

must stay at least 10 meters away from the vehicle in the front.

Never apply voltage before all preparations are done.

Cool the airbag down for at least 30 minutes before disposal of an activated airbag.

Always wear gloves and eye shield during disposal.

In case activation of airbag fails, disconnect power and wait for at least five minutes

before approaching vehicle again.

9. Activating Procedure

Warning: In case engine is stopped and fuse is taken off, the BCM will provides

sufficient voltage for 1 minute to activate airbag. If airbag is still connected, do not

start maintenance operation within one minute after power supply to BCM is switched

off. If airbag is disconnected, the maintenance may be started right away without

waiting for 1 minute to be discharged. Any failure in temporary disconnection of SRS

during maintenance will result in mistrigger of airbag, personal injuries and critical