AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble Code

DTC 15

DTC DETECTING CONDITION:

• Airbag harness (driver’s side) is shorted to power supply.

• Airbag module harness (driver’s side) is shorted to power supply.

• Roll connector is shorted to power supply.

• Driver’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 terminal from battery, and wait 20 seconds or more before starting to work.

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

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

• When inspecting the side airbag harness, disconnect the side airbag module connector, seat belt pretensioner connector 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 driver’s airbag module.

Is there poor contact?

Replace the airbag harness.

2.CHECK DRIVER’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 driver’s airbag module.

3) Connect the connector (AB2) to the connector (1N) in the test harness N.

4) Connect the airbag resistor to the connector (2N) in the test harness N.

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

Does the airbag warning light illuminate for 6 seconds then turn off?

Replace the driver’s airbag module.

3.CHECK ROLL CONNECTOR.

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

2) Disconnect the test harness N from connector (AB2).

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

4) Connect the connector (1F) in the test harness F to the connector (AB21).

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

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

Does the airbag warning light illuminate for 6 seconds then turn off?

Replace the roll connector.

4.CHECK AIRBAG MAIN 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 glove box, and disconnect the connector (AB4) and (AB27).

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

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

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

Connector & terminal

(2R) No. 2 (+) — Chassis ground (−):

(2R) No. 4 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Replace the airbag main harness along with body harness.

5.CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Erase 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 there any other DTC displayed?

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

Finish the diagnosis.