Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CONNECTOR
1. Turn the ignition switch to LOCK.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Disconnect the connectors from the steering wheel pad.
4. Check that the black spiral cable connector is not damaged.
  OK: The lock button is not disengaged, or the claw of the lock is not deformed or damaged.
NG: REPLACE SPIRAL CABLE

OK: GO TO NEXT STEP
CHECK DRIVER SIDE SQUIB (2ND STEP) CIRCUIT
1. Disconnect the connector from the center airbag sensor.
2. Release the airbag activation prevention mechanism built in the connector on the center airbag senor side between the airbag sensor assembly and the steering wheel pad (driver side squib (2nd step)) (see DIAGNOSIS SYSTEM ).
3. Measure the resistance between D2+ and D2- of the black connector on the steering wheel pad (driver side squib (2nd step)) side between the center airbag senor and the steering wheel pad (driver side squib (2nd step)).
  Standard resistance: 1 MΩ or higher
Fig 1: Checking Driver Side Squib (2nd Step) Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 5

OK: GO TO NEXT STEP
CHECK CENTER AIRBAG SENSOR ASSEMBLY
1. Connect the connector to the center airbag senor.
2. Connect the negative (-) terminal cable to the battery, and wait at least for 2 seconds.
3. Turn the ignition switch to ON, and wait at least for 10 seconds.
4. Clear the DTC stored in memory (see DTC CHECK/CLEAR ).
5. Turn the ignition switch to LOCK, and wait at least for 10 seconds.
6. Turn the ignition switch to ON, and wait at least for 10 seconds.
7. Check the DTC (see DTC CHECK/CLEAR ).
  OK: DTC B1180/17 is not output.
  
  HINT:
  
  Codes other than code B1180/17 may be output at this time, but they are not relevant to this check.
Fig 2: Checking Center Airbag Sensor Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE CENTER AIRBAG SENSOR ASSEMBLY

OK: GO TO NEXT STEP
CHECK DRIVER SIDE SQUIB (2ND STEP)
1. Turn the ignition switch to LOCK.
2. Disconnect the negative (-) terminal cable from the battery, and wait at least for 90 seconds.
3. Connect the steering wheel pad (driver side squib (2nd step)) to the spiral cable.
4. Connect the negative (-) terminal cable to the battery, and wait at least for 2 seconds.
5. Turn the ignition switch to ON, and wait at least for 10 seconds.
6. Clear the DTC stored in memory (see DTC CHECK/CLEAR ).
7. Turn the ignition switch to LOCK, and wait at least for 10 seconds.
8. Turn the ignition switch to ON, and wait at least for 10 seconds.
9. Check the DTC (see DTC CHECK/CLEAR ).
  OK: DTC B1180/17 is not output.
  
  HINT:
  
  Codes other than code B1180/17 may be output at this time, but they are not relevant to this check.
Fig 3: Checking Driver Side Squib (2nd Step)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STEERING WHEEL PAD (DRIVER SIDE SQUIB (2ND STEP))

OK: USE SIMULATION METHOD TO CHECK
CHECK SPIRAL CABLE
1. Disconnect the spiral cable connector from the column wire.
2. Release the airbag activation prevention mechanism built in the spiral cable connector on the center airbag senor side (see DIAGNOSIS SYSTEM ).
3. Measure the resistance between D2+ and D2- of the black spiral cable connector on the steering wheel pad (driver side squib (2nd step)) side.
  Standard resistance: 1 MΩ or higher
Fig 4: Checking Spiral Cable
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE

OK: GO TO NEXT STEP
CHECK COLUMN WIRE
1. Release the airbag activation prevention mechanism built in the column wire connector on the center airbag sensor side (see DIAGNOSIS SYSTEM ).
2. Measure the resistance between D2+ and D2- of the A28 column wire connector on the spiral cable side.
  Standard resistance: 1 MΩ or higher
Fig 5: Checking Column Wire
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE COLUMN WIRE

OK: GO TO NEXT STEP
CHECK DASH WIRE
1. Release the airbag activation prevention mechanism built in the connector of the dash wire on the center airbag senor side (see DIAGNOSIS SYSTEM ).
2. Measure the resistance between D2+ and D2- of the II4 dash wire connector on the column wire side.
  Standard resistance: 1 MΩ or higher
Fig 6: Checking Dash Wire
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE DASH WIRE

OK: USE SIMULATION METHOD TO CHECK