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.