Restraint Systems

DIAGNOSIS:
- Airbag control module is faulty.
- Airbag main harness circuit is open.
- Fuse No. 8 is blown. (In joint box)
- Body harness circuit is open.

CAUTION: Before performing diagnostics on airbag system, turn ignition switch "OFF", disconnect battery ground cable and then wait at least 20 seconds.
After 20 seconds elapse, remove instrument panel lower cover, and disconnect (AB3) and (AB8), (AB9) and (AB10).

5F1: AIRBAG CONTROL MODULE INSPECTION
1. Disconnect connector (AB6) from airbag control module and connect it to test harness E connector (1E).
2. Connect battery ground cable and turn ignition switch "ON". (engine off)




3. Measure voltage across connector (2E) terminal and chassis ground.

CHECK: Is voltage more than 10 V?

YES: Replace airbag control module.

NO: Go to step 5F2.

5F2: AIRBAG MAIN HARNESS INSPECTION
1. Go to following procedure after performing diagnostics on airbag system as per diagnosis procedure under "5F1: AIRBAG CONTROL MODULE INSPECTION" previously outlined.
2. Turn ignition switch "OFF", disconnect battery ground terminal and then wait at least 20 seconds.




3. Disconnect body harness connector (B31) from connector (AB1) at front lower pillar, and connect connector (AB1) to test harness A connector (2A).




4. Measure resistance between test harness A connector (5A) terminal and test harness E connector (2E) terminal.

CHECK: Is resistance less than 10 Ohms?

YES: Go to step 5F3.

NO: Replace airbag main harness.

5F3: AIRBAG MAIN HARNESS INSPECTION




Measure resistance between (5A) connector terminal and chassis ground.

CHECK: Is resistance more than 10 K Ohms?

YES: Go to step 5F4.

NO: Replace airbag main harness.

5F4: AIRBAG MAIN HARNESS INSPECTION




Measure resistance between (2E) connector terminal and chassis ground.

CHECK: Is resistance more than 10 K Ohms?

YES: Go to step 5F5.

NO: Replace airbag main harness.

5F5: FUSE NO.8 (IN JOINT BOX) INSPECTION
1. Turn ignition switch "OFF".




2. Remove and visually check fuse No. 8 (in joint box).

CHECK: Is fuse No. 8 blown?

YES: Replace fuse No. 8 if fuse No. 8 blows again, repair body harness.

NO: Repair body harness.