SAAB WIS ONLINE

AIRBAG WARNING LIGHT REMAINS ON

AIRBAG WARNING LIGHT REMAINS ON

DIAGNOSIS:


• Airbag warning light unit is faulty.

• Airbag control module to airbag warning light circuit is shorted or open.

• Grounding circuit is faulty.

• Airbag control module is faulty.

• (AB1) and (B31) are not connected properly.

• (AB3) is not connected properly to the airbag control module.


Important
• Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the ground cable from battery, and wait more than 20 seconds before starting to work.

• Before replacing the airbag module, seat belt pretensioner roll connector, control module, and sensor, reconnect each part and confirm that the warning light operates properly.

• When inspecting the airbag main harness, disconnect the airbag module connector of the driver and passenger seats for safety reasons.


WIRING DIAGRAM:


CHECK POOR CONTACT IN CONNECTORS (AB1) AND (B31).

Turn the ignition switch to OFF, disconnect the battery ground cable, and wait more than 20 seconds.

Remove the side sill cover. (Driver’s side)

Confirm that firm contact is secured between connectors (AB1) and (B31).

Is the poor contact in connectors (AB1) and (B31)?

Yes

Repair the body harness or replace the body harness with airbag main harness.


No


CHECK AIRBAG WARNING LIGHT.

Turn the ignition switch to OFF, disconnect the battery ground cable, and wait more than 20 seconds.

Connect the connector (1T) in test harness T to the body harness connector (B31).

Connect the connector (1M) in test harness M to the connector (2T) in test harness T.

Connect the battery ground cable and turn the ignition switch to ON.

Connect two connectors, (3M) and (4M) in test harness M.

Is the airbag warning light turned off?

Yes


No


CHECK BODY HARNESS.

Check the body harness.

Note

After problem has been eliminated, disconnect the connectors (3M) and (4M).


Is the anything unusual to body harness?

Yes

Repair the body harness.


No

Replace the combination meter printed circuit.


CHECK POOR CONTACT.

Confirm that firm contact is secured between the airbag control module and the connector (AB3).

Is the poor contact in connector (AB3)?

Yes

Replace the body harness with airbag main harness or replace the airbag control module.


No


CHECK AIRBAG MAIN HARNESS.

Turn the ignition switch to OFF, disconnect the battery ground cable, and wait more than 20 seconds.

Connect the connector (AB1) to (B31).

Disconnect the connectors (AB26) and (AB21).

Remove the glove box and disconnect the connectors (AB27) and (AB4).

Disconnect the connector (AB3) from the airbag control module, and connect the connector (1R) in test harness R.

Connect the battery ground cable and turn the ignition switch to ON.

Connect the connectors (5R) and (6R) in test harness R.

Note

After problem has been eliminated, disconnect the connectors (5R) and (6R).


Is the airbag warning light turned off?

Yes


No

Replace the body harness with airbag main harness.


CHECK GROUNDING CIRCUIT.

Turn the ignition switch to OFF, disconnect the battery ground cable, and wait more than 20 seconds.

Disconnect the connector (AB3) from the airbag control module.

Connect the connector (1R) in test harness R to body harness connector (AB3).

Measure the resistance between connector (2R) in test harness R and the chassis ground.

Connector & terminal

(2R) No. 10 — Chassis ground:

(2R) No. 11 — Chassis ground:

Is the resistance less than 10 Ω?

Yes

Replace the airbag control module.


No

Repair the body-grounding circuit.