AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble Code

DTC 12 PASSENGER’S AIRBAG FAILURE

DTC DETECTING CONDITION:

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

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

• Passenger’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

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

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

• When inspecting the airbag main harness, disconnect the airbag module connectors of the driver’s and passenger’s seats for safety.

• When inspecting the airbag rear harness, disconnect the side airbag module connector, curtain airbag module connector, seat belt pretensioner and lap seat belt pretensioner connector for safety reasons.

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK POOR CONTACT OF CONNECTORS.

Check for poor contact of the connectors between the airbag control module and the passenger’s airbag module.

Is there poor contact?

Replace the airbag harness.

2.CHECK PASSENGER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 20 seconds or more.

2) Remove the console front panel and disconnect the connectors (AB10) from (AB9).

3) Connect the test harness F connector (1F) to the connector (AB9).

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

5) Connect the battery ground terminal and turn the ignition switch to ON.

Does the airbag warning light illuminate for 6 seconds and go off?

Replace the passenger’s airbag module.

3.CHECK AIRBAG MAIN HARNESS (PASSENGER’S AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 20 seconds or more.

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

3) Remove the instrument panel lower cover and disconnect the connector (AB7) from (AB2).

4) Disconnect the connectors (AB6, AB17, and AB18) from the airbag control module, and connect the connector (1AG) in the test harness AG.

NOTE:

For model without side airbag, connect test harness AH between the connectors (AB6, AB17, AB18) and (1AG).

5) Measure the resistance between the test harness AG connector (3AG) and the test harness F connector (3F).

Connector & terminal

(3AG) No. 9 — (3F) No. 4:

(3AG) No. 7 — (3F) No. 3:

Is the resistance less than 10 Ω?

Replace the airbag main harness along with body harness.

4.CHECK AIRBAG MAIN HARNESS (PASSENGER’S AIRBAG HARNESS).

Measure the resistance between connectors (3AG) in the test harness AG, and between connector (3AG) and chassis ground.

Connector & terminal

(3AG) No. 9 — (3AG) No. 7:

(3AG) No. 9 — Chassis ground:

(3AG) No. 7 — Chassis ground:

Is the resistance 1 MΩ or more?

Replace the airbag main harness along with body harness.

5.CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC.

Is the same DTC displayed?

Replace the airbag control module.

6.CHECK FOR ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Check DTC using “List of Diagnostic Trouble Code (DTC)”.

Finish the diagnosis.