Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTC
1. Turn the ignition switch to ON, and wait at least for 10 seconds.
2. Clear the DTC stored in memory (see DTC CHECK/CLEAR ).
3. Turn the ignition switch to LOCK, and wait at least for 10 seconds.
4. Turn the ignition switch to ON, and wait at least for 10 seconds.
5. Check the DTC (see DTC CHECK/CLEAR ).
  OK: DTC B1153/25 is output.
  
  HINT:
  
  Codes other than code B1153/25 may be output at this time, but they are not relevant to this check.
NG: USE SIMULATION METHOD TO CHECK

Fig 1: Identifying DLC3 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP
CHECK CONNECTION OF 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. Check that the connectors are properly connected to the center airbag sensor and the seat position sensor.
NG: CONNECT CONNECTOR

OK: GO TO NEXT STEP
CHECK WIRE HARNESS
1. Using a service wire, connect LSP+ and LSP- of the S17 connector on the seat position sensor side between the center airbag sensor and the seat position sensor.
2. Measure the resistance between LSP+ and LSP- of the C25 connector on the center airbag sensor side between the seat position sensor and the center airbag sensor.
  Standard resistance: Below 1 Ω
NG: Go to step 9

Fig 2: Checking Wire Harness
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP
CHECK WIRE HARNESS (TO GROUND)
1. Release the service wire from the connector on the seat position sensor side.
2. Measure the resistance between the body ground and each of LSP+ and LSP- of the C25 connector on the center airbag sensor side between the seat position sensor and the center airbag sensor.
  Standard resistance: 10 kΩ or higher
NG: Go to step 10

Fig 3: Checking Wire Harness (To Ground)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP
CHECK WIRE HARNESS (TO B+)
1. Connect the negative (-) terminal cable to the battery, and wait at least for 2 seconds.
2. Turn the ignition switch to ON.
3. Measure the voltage between the body ground and each of LSP+ and LSP- of the C25 connector on the center airbag sensor side between the seat position sensor and the center airbag sensor.
  Standard voltage: Below 1 V
NG: Go to step 11

Fig 4: Checking Wire Harness (To B+)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP
CHECK SEAT POSITION SENSOR ASSEMBLY
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 connectors of the seat position sensor assembly and the center airbag sensor.
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 B1153/25 is not output.
  
  HINT:
  
  Codes other than code B1153/25 may be output at this time, but they are not relevant to this check.
OK: USE SIMULATION METHOD TO CHECK

Fig 5: Identifying DLC3 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: GO TO NEXT STEP
REPLACE SEAT POSITION SENSOR ASSEMBLY
1. Turn the ignition switch to LOCK.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Replace the seat position sensor.
  HINT:
  
  Perform the inspection using parts from a normal vehicle.
CHECK CENTER AIRBAG SENSOR ASSEMBLY
1. Connect the negative (-) terminal cable to the battery, and wait at least for 2 seconds.
2. Turn the ignition switch to ON, and wait at least for 10 seconds.
3. Clear the DTC stored in memory (see DTC CHECK/CLEAR )
4. Turn the ignition switch to LOCK, and wait at least for 10 seconds.
5. Turn the ignition switch to ON, and wait at least for 10 seconds.
6. Check the DTC (see DTC CHECK/CLEAR )
  OK: DTC B1153/25 is not output
  
  HINT:
  
  DTCs other that DTC B1153/25 may be output at this time, but they are not relevant to this check.
NG: REPLACE CENTER AIRBAG SENSOR ASSEMBLY

Fig 6: Identifying DLC3 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: USE SIMULATION METHOD TO CHECK
CHECK FRONT SEAT WIRE LH
1. Disconnect the front seat wire LH connector from the No. 1 floor wire.
2. Using a service wire, connect LSP+ and LSP- of the S17 front seat wire LH connector on the seat position sensor assembly side.
3. Measure the resistance between LSP+ and LSP- of the BM2 front seat wire LH connector on the No. 1 floor wire side.
  Standard resistance: Below 1 Ω
NG: REPAIR OR REPLACE FRONT SEAT WIRE LH

Fig 7: Checking Front Seat Wire LH
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPAIR OR REPLACE NO. 1 FLOOR WIRE
CHECK FRONT SEAT WIRE LH (TO GROUND)
1. Disconnect the front seat wire LH connector from the No. 1 floor wire.
2. Release the service wire from the front seat wire LH connector on the seat position sensor side.
3. Measure the resistance between the body ground and each of LSP+ and LSP- of the BM2 front seat wire LH connector on the No. 1 floor wire side.
  Standard resistance: 10 Ω or higher
NG: REPAIR OR REPLACE FRONT SEAT WIRE LH

Fig 8: Checking Front Seat Wire LH (To Ground)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPAIR OR REPLACE NO. 1 FLOOR WIRE
CHECK FRONT SEAT WIRE LH (TO B+)
1. Disconnect the front seat wire LH connector from the No. 1 floor wire.
2. Measure the voltage between the body ground and each of LSP+ and LSP- of the BM2 front seat wire LH connector on the No. 1 floor wire side.
  Standard voltage: Below 1 V
NG: REPAIR OR REPLACE FRONT SEAT WIRE LH

Fig 9: Checking Front Seat Wire LH (To B+)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPAIR OR REPLACE NO. 1 FLOOR WIRE