Airbag Warning Light Remains On

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.
- (AB2) and (B31) 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. DOUBLE LOCK INSPECTION FOR CONNECTORS (AB1) AND (B31)

1. Remove front pillar lower trim (Driver side).
2. Check double lock of connectors (AB1) and (B31).

CHECK: Is there poor contact in double lock of connectors (AB1) end (B31)?

YES: Repair poor contact in double lock of connectors (AB1) and (B31).

NO: Go to step 2.

2. INSPECTION OF BODY HARNESS, CONNECTOR AND 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 3.

NO: Go to next

CHECK: Is there anything unusual to body harness?

YES: Repair body harness.

NO: Replace airbag warning light module (1).

NOTE: After problem has been eliminated, disconnect connectors (3A) and (4A).

3. Turn ignition switch "OFF", disconnect battery ground cable and then wait at least 20 seconds, and re-connect connectors (AB1) and (B31).
4. Remove instrument panel lower cover and disconnect (AB3) with (AB8), then disconnect connector (AB6) from airbag control module, and connect it to test harness B2 connector (8B).

5. Connect battery ground cable and turn ignition switch "ON," (engine off) and connect connectors (6B) and (7B).

CHECK: Does the airbag warning light come on?

YES: Go to step 3.

NO: Replace airbag main harness.

NOTE: After problem has been eliminated, disconnect connectors (6B) and (7B).

3. GROUNDING CIRCUIT INSPECTION

1. Turn ignition switch "OFF", disconnect battery ground cable and then wait at least 20 seconds. Disconnect connector (AB1) from body harness connector (B31), and connect connector (B31) to test harness A connector (1A). Measure resistance between connector (5A) terminal and chassis ground.

CHECK: Connector & terminal
(5A) No.17 (+) - Chassis ground (-):
Is resistance less than 10 Ohm?

YES: Go to next

NO: Repair body grounding circuit.

CHECK: Connector & terminal
(5A) No.18 (+) - Chassis ground (-):
Is resistance less than 10 Ohm?

YES: Go to step 2.

NO: Repair body grounding circuit.

2. Connect connectors (AB1) and (B31). Disconnect connector (AB6) from airbag control module and connect it to test harness B2 connector (8B).
3. Measure resistance between each test harness B2 connector (5B) terminal and chassis ground.

CHECK: Connector & terminal
(5B) No.11 (+) - Chassis ground (-):
Is resistance less then 10 Ohm?

YES: Go to next

NO: Replace airbag main harness.

CHECK: Connector & terminal
(5B) No.12 (+) - Chassis ground (-):
Is resistance less than 10 Ohm?

YES: Replace airbag control module.

NO: Replace airbag main harness.