Inspection Procedure

If the DTC is not displayed, do the following troubleshooting. 

1. Does SRS warning light up for approx. 6 seconds? 

   CHECK: 

   Check operation of the SRS warning light after ignition switch is turned from LOCK position to ON position.

   Fig 1: Identifying SRS Warning Light

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NO: Check SRS warning light system (See  SRS WARNING LIGHT CIRCUIT MALFUNCTION   ). 
   2. YES: Go to next step. 
2. Check voltage between terminal TC and CG of DLC3. 

   PREPARATION: 

   Turn the ignition switch to ON.

   CHECK: 

   Measure the voltage between terminal TC and CG of DLC3.

   OK: 

   Voltage: 10 - 14V 

   Fig 2: Checking Voltage Between Terminal TC & CG

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: Go to step   4 . 
   2. NG: Go to next step. 
3. Check voltage between terminal TC of DLC3 and body ground. 

   CHECK: 

   Measure the voltage between terminal TC of DLC3 and body ground.

   OK: 

   Voltage: 10 - 14V 

   1. OK: Check harness between terminal CG of DLC3 and body ground. 
   2. NG: Go to next step. 
      Fig 3: Measuring Voltage Between Terminal TC Of DLC3 & Body Ground

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check airbag sensor assembly. 

   PREPARATION: 

   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 airbag sensor assembly connector.
   4. Insert service wire into terminal TC from back side as shown in the illustration.
   5. Connect the airbag sensor assembly 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 60 seconds.
   8. Connect service wire of terminal TC to body ground.
      Fig 4: Checking Airbag Sensor Assembly

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CHECK: 

   Check operation of the SRS warning light.

   OK: 

   SRS waning light comes on. 

   NOTE: Pay due attention to the terminal connecting position to avoid a malfunction.
   1. OK: Check harness between the airbag sensor assembly and DLC3. 
   2. NG: Go to next step. 

      Replace airbag sensor assembly. 

If the DTC is displayed without a DTC check procedure, perform the following troubleshooting. 

1. Check resistance between terminal Tc of airbag sensor assembly and body ground. 

   PREPARATION: 

   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 airbag sensor assembly connector.
      Fig 5: Checking Resistance Between Terminal TC Of Airbag Sensor Assembly & Body Ground

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CHECK: 

   Check resistance between terminal TC of the airbag sensor assembly connector and the body ground.

   OK: 

   Resistance: 1 MΩ or Higher 

   1. NG: Repair or replace harness or connector. 
   2. OK: Go to next step. 

      Replace airbag sensor assembly.