Restraint Systems
DIAGNOSIS:- Airbag main harness circuit is open, shorted or shorted to ground.
- Airbag module harness (Driver) circuit is open, shorted or shorted to ground.
- Roll connector circuit is open, shorted or shorted to ground.
- Airbag control module is faulty.
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).
5B1: AIRBAG MAIN HARNESS INSPECTION
1. Remove lower cover panel and connect connector (AB8) below steering column to test harness F connector (1F).
2. Disconnect connector (AB6) from airbag control module, and connect it to test harness I connector (1I) terminal.
3. Measure resistance between test harness I connector (2I) and test harness F connector (3F) terminals.
CHECK: Is resistance less than 1O Ohms?
YES: Go to step 5B2.
NO: Replace airbag main harness.
5B2: AIRBAG MAIN HARNESS INSPECTION
Measure resistance between test harness I connector (2I) and test harness F connector (3F) terminals.
CHECK: Is resistance less than 10 Ohms?
YES: Go to step 5B3.
NO: Replace airbag main harness.
5B3: AIRBAG MAIN HARNESS INSPECTION
1. Disconnect connector (AB6) from airbag control module, and connect it to test harness I connector (1I).
2. Measure resistance between test harness I connector (2I) terminal.
CHECK: Is resistance more than 10 K Ohms?
YES: Go to step 5B4.
NO: Replace airbag main harness.
5B4: AIRBAG MAIN HARNESS INSPECTION
1. Disconnect connector (AB6) from airbag control module and connect it to test harness I connector (1I).
2. Measure resistance between test harness I connector (2I) terminals and chassis ground.
CHECK: Is resistance more than 200 Ohms?
YES: Go to step 5B5.
NO: Replace airbag main harness.
5B5: AIRBAG MAIN HARNESS INSPECTION
Measure resistance between test harness I connector (2I) terminals and chassis ground.
CHECK: Is resistance more than 200 Ohms?
YES: Replace airbag control module.
NO: Replace airbag main harness.