AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble Code

DTC DETECTING CONDITION:

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

• Airbag module harness (passenger’s side) 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 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 airbag module connectors of the driver’s and passenger’s seats 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.

NOTE:

Before performing diagnoses, prepare two airbag resistors (98299PA040).

WIRING DIAGRAM:

STEP	CHECK	YES	NO
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 glove box. 3) Disconnect the connectors (AB27) and (AB4) of the passenger’s airbag. 4) Connect the connector (1P) in the test harness P to connector (AB4). 5) Connect airbag resistor to connectors (2P) and (3P) in the test harness P. 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 passenger’s airbag module.
3.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 in the test harness P. 3) Remove the instrument panel lower cover, and disconnect the connector (AB21) from (AB26). 4) Disconnect the connector (AB3) from airbag control module, and connect the connector (1R) in the test harness R. 5) Measure resistance between connector (2R) in the test harness R and connector (2P) in the test harness P. Connector & terminal (2R) No. 3 — (2P) No. 1: (2R) No. 5 — (2P) No. 2: (2R) No. 9 — (3P) No. 3: (2R) No. 13 — (3P) No. 4:	Is the resistance less than 10 Ω?		Replace the airbag main harness along with body harness.
4.CHECK AIRBAG MAIN HARNESS. Measure resistance between connector (2R) terminals in the test harness R. Connector & terminal (2R) No. 3 — (2R) No. 5: (2R) No. 3 — Chassis ground: (2R) No. 5 — Chassis ground: (2R) No. 9 — (2R) No. 13: (2R) No. 9 — Chassis ground: (2R) No. 13 — 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) 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.