Safety airbag system
T-45
3) Handle as per the following fault log.
2. Fault indicator constant on
1) Whether the fault log can be read out through
the diagnostic apparatus.
Yes: To the step (2)
No: To the step (3)
2) When the fault reason read out, take disposal as
per the method in the following fault log:
3) Check whether the safety airbag fuse, relevant
power supply harness are normal or not.
4) Check whether the controller connector of
safety airbag is normal.
3. Fault indicator flashing
Read out through the airbag fault diagnostic
apparatus, the fault log and dispose as per the
method in the following fault log.
4. There is an ECU internal fault in the fault log.
Replace the controller of safety airbag
5. Power supply too low or high in fault log Test
the power supply system of vehicle
6. There are driver airbag malfunctions in the
fault log (resistance low/high, short-circuited
with the grounding, or with the power supply).
1) Low resistance
(1) Pull out the driver airbag module to test
whether the fault disappeared.
Yes: Replace the driver airbag module
No: To the step (2)
(2) Pull out, below the clock spring, the harness
connector wrapped in middle with the yellow,
to test whether the fault disappeared.
Yes: Replace the clock spring
No: To the step (3)
(3) Replace the controller of safety airbag, to test
whether the fault disappeared.
(4) Check whether there are any short-circuits
occurred between the harnesses; pay attention
to the short-circuit ring in the connector in
connection with the controller.
2) High resistance
(1) Check whether the connectors between the
driver airbag module and clock spring, between
the clock spring and harness and between the
harness and controller of safety airbag
controller are plugged in place.
(2) Check whether the resistance between the
upper/lower cables of clock springs is less than
2 ohms.
Yes: To the step (2)
No: Replace the clock spring.
(3) Replace the driver airbag module to test
whether the fault disappeared.
(4) Replace safety airbag controller to test whether
the fault disappeared.
(5) Test break-circuit occurred in the harness.
3) Short-circuited with the grounding or with the
power supply
(1) Replace clock spring to test whether the fault
disappeared.
(2) Replace driver airbag module to test whether
the fault disappeared.
(3) Replace safety airbag controller to test whether
the fault disappeared.
(4) Test whether there is any short-circuit in the
harness.
(5) Occupant airbag faults in the fault log
(Low/high resistance, short-circuited with the
grounding or with the power supply)
1) Low resistance
(1) Pull out the driver airbag module to test
whether the fault disappeared.
Yes: Replace driver airbag module
No: To the step (2)
(2) Pull out, below the clock spring, the harness
connector wrapped in middle with the yellow,
to test whether the fault disappeared
Yes: Replace clock spring
No: To the step (3)
(3) Replace safety airbag controller to test whether
the fault disappeared.
(4) Check whether there are any short-circuits
occurred between the harnesses. Pay attention
to the short-circuit ring in the plug in
connection with the controller.
2) High resistance
(1) Check whether the connectors between the
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