AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble Code

DTC DETECTING CONDITION:

• Front sub sensor harness (RH) is shorted, open or shorted to power supply.

• Airbag harness is shorted, open or shorted to power supply.

• Front sub sensor (RH) 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:

• LHD model

• RHD model

STEP	CHECK	YES	NO
1.CHECK POOR CONTACT OF CONNECTORS. Check for poor contact of the connectors between the airbag control module and the front sub sensor RH.	Is there poor contact?	Repair the connector.
2.CHECK FRONT SUB SENSOR (RH) AND AIRBAG HARNESS. 1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 20 seconds or more. 2) Disconnect the connector (AB3) from airbag control module, and connect the connector (1R) in the test harness R. 3) Measure resistance between connector (3R) terminals in the test harness R. Connector & terminal (3R) No. 7 — (3R) No. 9:	Is the resistance 750 — 1 KΩ?	Replace the airbag control module.
3.CHECK AIRBAG MAIN HARNESS AND FRONT SUB SENSOR HARNESS (RH). 1) Disconnect the connector (AB15) from front sub sensor. 2) Measure resistance between connector (3R) terminals in the test harness R, and the resistance between connector (3R) in the test harness R and chassis ground. Connector & terminal (3R) No. 7 — (3R) No. 9: (3R) No. 7 — Chassis ground: (3R) No. 9 — Chassis ground:	Is the resistance 1 MΩ or more?		Replace the airbag main harness and front sub sensor harness along with body harness.
4.CHECK FRONT SUB SENSOR (RH). 1) Connect connector (1AA) in the test harness AA to the front sub sensor (RH). 2) Measure resistance between connector (2AA) terminals in the test harness AA. Connector & terminal (2AA) No. 1 — (2AA) No. 2:	Is the resistance 750 — 1 KΩ?		Replace the front sub sensor (RH).
5.CHECK FRONT SUB SENSOR (RH). Measure resistance between the connector (2AA) in the test harness AA and chassis ground. Connector & terminal (2AA) No. 1 — Chassis ground: (2AA) No. 2 — Chassis ground:	Is the resistance 1 MΩ or more?		Replace the front sub sensor (RH).
6.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.
7.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.