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 SRS WARNING LIGHT
1. Check operation of the SRS warning light after the ignition switch is turned from LOCK position to ON position.
Fig 1: Checking SRS Warning Light
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: CHECK SRS WARNING LIGHT SYSTEM

OK: GO TO NEXT STEP
CHECK VOLTAGE BETWEEN TERMINAL TC AND CG OF DLC3
1. Turn the ignition switch to ON.
2. Measure the voltage between terminal TC and CG of the D7 DLC3.
  Standard voltage: 4 to 14 V
Fig 2: Checking Voltage Between Terminal TC & CG Of DLC3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to step 5

NG: GO TO NEXT STEP
CHECK VOLTAGE BETWEEN TERMINAL TC OF DLC3 AND BODY GROUND
1. Measure the voltage between the body ground and terminal TC of the D7 DLC3.
  Standard voltage: 4 to 14 V
Fig 3: Checking Voltage Between Terminal TC Of DLC3 & Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: CHECK HARNESS BETWEEN TERMINAL CG OF DLC3 AND BODY GROUND

NG: GO TO NEXT STEP
CHECK CENTER AIRBAG 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. Disconnect the center airbag sensor connector.
4. Insert the service wire into terminal TC of the C26 connector from back side as shown in the illustration.
5. Connect the center airbag sensor connector with service wire.
6. Connect the negative (-) terminal cable to the battery.
7. Turn the ignition switch to ON and wait at least for 20 seconds.
8. Connect the service wire of terminal TC to body ground.
  OK: SRS warning light comes on.
  
  NOTE: Pay due attention to the terminal connecting position to avoid a malfunction.
Fig 4: Checking Center Airbag Sensor Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: CHECK HARNESS BETWEEN THE AIRBAG SENSOR ASSEMBLY AND DLC3

NG: REPLACE CENTER AIRBAG SENSOR ASSEMBLY
CHECK RESISTANCE BETWEEN TERMINAL TC OF CENTER AIRBAG SENSOR ASSEMBLY AND BODY GROUND
1. Turn the ignition switch to LOCK.
2. Disconnect negative (-) terminal cable from the battery, and wait at least for 90 seconds.
3. Disconnect the center airbag sensor connector.
4. Check resistance between terminal TC of the C26 center airbag sensor connector and body ground.
  Standard resistance: 1 MΩ or higher
Fig 5: Checking Resistance Between Terminal TC Of Center Airbag Sensor Assembly & Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE CENTER AIRBAG SENSOR ASSEMBLY