Restraint Systems

DIAGNOSIS:
- Airbag control module is faulty.
- Airbag main harness circuit is open.
- Fuse No.16 is blown.
- 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).




1. AIRBAG CONTROL MODULE INSPECTION

1. Disconnect connector (AB6) from airbag control module, and connect it to test harness B2 connector (8B).
2. Connect battery ground cable and turn ignition switch "ON" (engine off).
3. Measure voltage across connector (5B) terminal and chassis ground.

CHECK: Connector & terminal
(5B) No.5 (+) - Chassis ground (-):
Is voltage more than 10 V?

YES: Replace airbag control module.

NO: Go to step 2.

2. AIRBAG MAIN HARNESS INSPECTION

1. Go to step 2. below after performing diagnostics on airbag system as per diagnosis procedure under "1. AIRBAG CONTROL MODULE INSPECTION" previously outlined.
2. Turn ignition switch "OFF", disconnect battery ground cable and then wait at least 20 seconds.




3. Disconnect connector (AB1) from body harness connector (B31) at front lower pillar (driver side), and connect connector (AB1) to test harness A connector (2A).
4. Measure resistance between test harness A connector (5A) and test harness B2 connector (5B) terminals.

CHECK: Connector & terminal
(5A) No.9 - (5B) No.5:
Is resistance less than 10 Ohm?

YES: Go to step 5.

NO: Replace airbag main harness.

5. Measure resistance between each terminal of connectors (5A) and (5B) and chassis ground.

CHECK: Connector & terminal
(5A) No.9 (+) - Chassis ground (-):

YES: Go to next

NO: Replace airbag main harness.

CHECK: Connector & terminal
(5B) No.5 (+) - Chassis ground (-):
Is resistance more than 10 kOhm?

YES: Go to step 3.

NO: Replace airbag main harness.

3. FUSE No.16 INSPECTION
Make sure ignition switch is turned "OFF", then remove and visually check fuse No.16.

CHECK: Is fuse No.16 blown?

YES: Replace fuse No.16. If fuse No.16 blows again, repair body harness.

NO: Repair body harness.