Inspection Procedure

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 B1155/39 is output. 

   HINT:

   Codes other than code B1155/39 may be output at this time, but they are not relevant to this check.

Fig 1: Checking For DTC

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: USE SIMULATION METHOD TO CHECK 

OK: GO TO NEXT STEP 

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 airbag sensor rear LH.

   OK: The connectors are connected. 

NG: CONNECT CONNECTOR 

OK: GO TO NEXT STEP 

1. Using a service wire, connect CSL+ and CSL- of the S13 No. 1 floor wire connector on the curtain shield airbag sensor LH side.
2. Measure the resistance between CSL+ and CSL- of the C25 No. 1 floor wire connector on the center airbag sensor side.

   Standard resistance: Below 1 Ω 

Fig 2: Checking No. 1 Floor Wire

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE NO. 1 FLOOR WIRE 

OK: GO TO NEXT STEP 

1. Using a service wire, connect VUCL and ESCL of the S13 No. 1 floor wire connector on the curtain shield airbag sensor LH side.
2. Measure the resistance between VUCL and ESCL of the C25 No. 1 floor wire connector on the center airbag sensor side.

   Standard resistance: Below 1 Ω 

Fig 3: Checking No. 1 Floor Wire

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE NO. 1 FLOOR WIRE 

OK: GO TO NEXT STEP 

1. Measure the resistance between the body ground and each of VUCL, CSL+ and CSL- of the C25 No. 1 floor wire connector on the center airbag sensor side.

   Standard resistance: 10 kΩ or higher 

Fig 4: Checking No. 1 Floor Wire (To Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE NO. 1 FLOOR WIRE 

OK: GO TO NEXT STEP 

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 VUCL, CSL+, CSL- and ESCL of the C25 No. 1 floor wire connector on the center airbag sensor side.

   Standard voltage: Below 1 V 

Fig 5: Checking No. 1 Floor Wire (To B+)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE NO. 1 FLOOR WIRE 

OK: GO TO NEXT 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 connector to the center airbag sensor.
4. Change the curtain shield airbag sensor RH position with LH position.
5. Connect the negative (-) terminal cable to the battery, and wait at least for 2 seconds.
6. Turn the ignition switch to ON, and wait at least for 10 seconds.
7. Clear the DTC stored in memory (see DTC CHECK/CLEAR  ).
8. Turn the ignition switch to LOCK, and wait at least for 10 seconds.
9. Turn the ignition switch to ON, and wait at least for 10 seconds.
10. Check the DTC (see DTC CHECK/CLEAR  ).

    OK: DTC B1155/39 and B1154/38 are not output. 

    HINT:

    Codes other than code B1155/39 B1154/38 may be output at this time, but they are not relevant to this check.

Fig 6: Checking Center Airbag Sensor Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE CENTER AIRBAG SENSOR ASSEMBLY (DTC B1155/39 IS OUTPUT) 

NG: REPLACE CURTAIN SHIELD AIRBAG SENSOR ASSEMBLY LH (DTC B1154/38 IS OUTPUT) 

OK: USE SIMULATION METHOD TO CHECK