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 (B39) are not connected properly.

CAUTION: Before performing diagnostics on airbag system, turn ignition switch "OFF", disconnect battery ground cable and then wait at least 20 seconds.

1. INSPECTION OF BODY HARNESS, CONNECTOR AND AIRBAG WARNING LIGHT




1. Turn ignition switch "OFF" and connect connector (B39) to test connector-A connector (1A).

Test harness A-PN98299PA000




2. Connect battery ground cable and turn ignition switch "ON", (engine off) and connect connectors (3A) and (4A) to check if warning light goes out. If it does, go to step 4) below. If it remains on, check body harness and repair if necessary.




3. If body harness is satisfactory, replace airbag warning light unit (1). After problem has been eliminated, disconnect connectors (3A) and (4A).




4. Turn ignition switch "OFF", disconnect battery ground cable and then wait at least 20 seconds, and re-connect connectors (AB1) and (B39).
5. Remove instrument panel lower cover and disconnect (AB3) with (AB8), then disconnect connector (AB6) from airbag control module and connect it to lest harness-B connector (8B).

Test harness B-PN98299PA010




6. Connect battery ground cable and turn ignition switch "ON," (engine off) and connect connectors (6B) and (7B) to check if warning light goes out. If it does, go to "2. Grounding Circuit Inspection". If it remains on, replace airbag main harness. After problem has been eliminated, disconnect connectors (6B) and (7B).

2. GROUNDING CIRCUIT INSPECTION




1. Turn ignition switch "OFF", disconnect battery ground cable and then wait at least 20 seconds. Disconnect connector (AB1) from bulk harness connector (B39), and connect connector (B39) to test harness-A connector (1A). Measure resistance between connector (5A) terminal and body.

(5A) Terminal / Specified resistance:
No.17 - Body / 10 Ohm, or less
No.18 - Body / 10 Ohm, or less

If resistance is greater than 10 Ohms, body grounding circuit is faulty and should be repaired. If resistance is less than 10 Ohms, go to step 2) below.




2. Connect connectors (AB1) and (B39). Disconnect connector (AB6) from airbag control module and connect it to test harness-B connector (8B).
3. Measure resistance between each test harness-B connector (5B) terminal and body.

(5B) Terminal / Specified resistance:
No.11 - Body / 10 Ohm, or less
No.12 - Body / 10 Ohm, or less

If resistance is greater than 10 Ohm, replace airbag main harness.
If resistance is less than 10 Ohm, replace airbag control module.