SAAB WIS ONLINE

DTC 12

DTC 12

DTC DTTECTING CONDITION:


• Airbag main harness circuit is open, shorted or shorted to ground.

• Airbag module harness (Passenger) circuit is open, shorted or shorted to ground.

• Passenger’s airbag module is faulty.

• Airbag control module is faulty.


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 PASSENGER’S AIRBAG MODULE.

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

Remove the glove box.

Disconnect the connector (AB27) from (AB4).

Connect the connector (1F) in test harness F to connector (AB4).

Connect the airbag resistor to connector (3F) in test harness F.

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

Does the airbag warning light operate properly?

Yes

Replace the passenger’s airbag module.


No


CHECK AIRBAG MAIN HARNESS.

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

Disconnect the airbag resistor from the connector (3F) in test harness F.

Remove the instrument panel lower cover and disconnect the connector (AB26) from (AB21).

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

Measure the resistance between connector (2R) in test harness R and the connector (3F) in test harness F.

Connector & terminal

(2R) No. 3 — (3F) No. 4:

(2R) No. 5 — (3F) No. 3:

Is the resistance less than 10 Ω?

Yes


No

Replace the body harness with airbag main harness.


CHECK AIRBAG MAIN HARNESS.

Measure the resistance of the connector (2R) in test harness R.

Connector & terminal

(2R) No. 3 — (2R) No. 5:

(2R) No. 3 — Chassis ground:

(2R) No. 5 — Chassis ground:

Is the resistance more than 1 MΩ?

Yes

Replace the airbag control module.


No

Replace the body harness with airbag main harness.