Supplemental restraint system--Remove malfunction
Remove malfunction...........................................
Malfunction table............................................
l The voltage disappears (fuse is cut off)
l Combination instrument happens malfunction
l Wiring harness between instrument package
and ECU unit has malfunction
Malfunction Test state Possible reason
Indicating light of
safety airbag
system does not
illuminate
Warning circuit of safety
airbag system happens
malfunction
- Indicating light of safety airbag system does not illuminate
Diagnostic procedure
When making first malfunction test, we advise shaking wiring harness and plug to test whether there is
discontinuous bad contact in wire, if having this problem, please verify whether the connection of plug, terminal
and wiring harness is correct and is not damaged, if it is not this problem, please make by next step.
(1) Check other wiring harnesses and indicating lights of instrument package
a. Set ignition switch at ON position,
b. Are other warning indicating lights illuminating?
If illuminating: set ignition switch on LOCK position, then make next operation.
If not: check the power supply system and grounding system of instrument package (fuse), then
make step 5.
(2) Check the bulb
Warning: wrong treatment for safety airbag system parts will incur safety airbag and pre-
tension safety belt are opened accidentally, this might happen heavy accident. Please read
service warning of safety airbag system before disposing safety airbag parts.
a. Set ignition switch at LOCK position,
b. Cut off cathode wire of battery and keep this state for 60 seconds at least,
c. Disassemble combination instrument,
d. Measure whether corresponding two pins of indicating light of safety airbag could conduct,
Yes: make next step,
No: change the bulb of indicating light.
(3) Check the wiring harness connection between ECU unit and instrument package.
a. Set ignition switch at LOCK position,
b. Cut off cathode wire of battery,
c. Cut off the plug of instrument package ,
d. Check whether corresponding circuit of indicating light could conduct,
Yes: make next step,
No: change the wiring harness, then make step 5.
251
Number Malfunction removing item Specification
1 Indicating light of safety airbag system does not illuminate Warning circuit of safety airbag system happens malfunction
2 Indicating light of safety airbag system illuminates usually Warning circuit of safety airbag system happens malfunction or
there is exterior malfunction
