Airbag Warning Light Remains On
DIAGNOSIS:- Airbag warning light is faulty.
- Airbag control module to airbag warning light harness circuit is shorted or open.
- Grounding circuit is faulty.
- Airbag control module is faulty.
- (AB1) and (B31) are not connected properly.
- (AB6) is not connected properly to airbag control module.
CAUTION: Before performing diagnostics on airbag system, turn ignition switch "OFF", disconnect battery ground cable and then wait at least 20 seconds.
5Y1: CHECK POOR CONTACT IN CONNECTORS (AB1) AND (B31).
1. Remove front pillar lower trim (Driver side).
2. Check poor contact in connectors (AB1) and (B31).
CHECK: Is there poor contact in double lock of connectors (AB1) and (B31)?
YES: Repair poor contact in double lock of connectors (AB1) and (B31).
NO: Go to step 5Y2.
5Y2: INSPECTION OF AIRBAG WARNING LIGHT
1. Turn ignition switch "OFF" and connect body harness connector (B31) to test connector A connector (1A).
2. Connect battery ground cable and turn ignition switch "ON", (engine off) and connect connectors (3A) and (4A).
CHECK: Does the airbag warning light come off?
YES: Go to step 5Y4.
NO: Go to step 5Y3.
5Y3: INSPECTION OF BODY HARNESS
Check body harness.
NOTE: After problem has been eliminated, disconnect connectors (3A) and (4A).
CHECK: Is there anything unusual to body harness?
YES: Repair body harness.
NO: Replace airbag warning light module.
5Y4: CHECK POOR CONTACT IN CONNECTOR (AB6).
Check connector (AB6) connected to airbag control module.
CHECK: Is there poor contact in connector (AB6)?
YES: Repair poor contact in connector (AB6).
NO: Go to step 5Y5.
5Y5: INSPECTION OF AIRBAG MAIN HARNESS
1. Turn ignition switch "OFF", disconnect battery ground cable and then wait at least 20 seconds, and re-connect connectors (AB1) and (B31).
2. Remove instrument panel lower cover and disconnect (AB3) with (AB8), then disconnect connector (AB6) from airbag control module, and connect it to test harness E connector (1E).
3. Connect battery ground cable and turn ignition switch "ON", (engine off) and connect connectors (4E) and (5E).
NOTE: After problem has been eliminated, disconnect connectors (4E) and (5E).
CHECK: Does the airbag warning light come on?
YES: Go to step 5Y6.
NO: Replace airbag main harness.
5Y6: GROUNDING CIRCUIT INSPECTION
1. Turn ignition switch "OFF", disconnect battery ground cable and then wait at least 20 seconds.
2. Disconnect connector (AB1) from body harness connector (B31), and connect connector (B31) to test harness A connector (1A).
3. Measure resistance between connector (5A) terminal and chassis ground.
CHECK: Is resistance less than 10 Ohms?
YES: Go to step 5Y7.
NO: Repair body grounding circuit.
5Y7: GROUNDING CIRCUIT INSPECTION
Measure resistance between connector (5A) terminal and chassis ground.
CHECK: Is resistance less than 10 Ohms?
YES: Go to step 5Y8.
NO: Repair body grounding circuit.
5Y8: INSPECTION OF AIRBAG MAIN HARNESS
1. Connect connectors (AB1) and (B31). Disconnect connector (AB6) from airbag control module, and connect it to test harness E connector (1E).
2. Measure resistance between each test harness E connector (2E) terminal and chassis ground.
CHECK: Is resistance less than 10 Ohms?
YES: Go to step 5Y9.
NO: Replace airbag main harness.
5Y9: INSPECTION OF AIRBAG MAIN HARNESS
Measure resistance between each test harness E connector (2E) terminal and chassis ground.
CHECK: Is resistance less than 10 Ohms?
YES: Replace airbag control module.
NO: Replace airbag main harness.