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Inspection Procedure

NOTE: The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the PRECAUTION for the supplemental restraint system (see PRECAUTION (2006/02-2006/07) ).
  1. CHECK WIRE HARNESS (SPIRAL CABLE - BATTERY) 
    1. Disconnect the K20 cable connector.
    2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester connection Condition Specified condition
      K20-12 (IL+2) - Body ground Light control switch TAIL or HEAD 10 to 14 V
      3. Fig 1: Identifying K20 Spiral Cable Connector Terminals
      G05299506Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO Next Step 

  2. CHECK STEERING PAD SWITCH ASSEMBLY 
    Fig 2: Identifying Steering Pad Switch Assembly Connector Terminals
    G05299507Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the switch connector.
    2. Connect the positive (+) lead to terminal 5 (IL+2) and the negative (-) lead to terminal 8 (EAU) of the steering pad switch connector.
    3. Check if the illumination for the steering pad switch comes on.

      OK: Illumination for the steering pad switch comes on. 

    NG: REPLACE STEERING PAD SWITCH ASSEMBLY 

    OK: GO TO Next Step 

  3. INSPECT SPIRAL CABLE 
    1. Disconnect the cable connectors.
    2. Measure the resistance of the cable.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Spiral Cable Position Specified Condition
      K20-4 (EAU) - A-8 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      K20-12 (IL+2) - A-5 (IL+2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      NOTE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the PRECAUTION for the supplemental restraint system (see PRECAUTION (2006/02-2006/07) ).
      Fig 3: Inspecting Spiral Cable
      G05311350Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE SPIRAL CABLE SUB-ASSEMBLY 

    OK: GO TO Next Step 

  4. CHECK WIRE HARNESS (RADIO RECEIVER - BATTERY) 
    1. Disconnect the K54 radio connector.
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      K54-2 (ILL+) - Body ground Light control switch TAIL or HEAD 10 to 14 V
      3. Fig 4: Identifying K54 Radio Receiver Connector Terminals
      G05299509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO Next Step 

  5. CHECK WIRE HARNESS (RADIO RECEIVER - SPIRAL CABLE AND COMBINATION METER) 
    1. Disconnect the K56 and K54 receiver connectors.
    2. Disconnect the K20 cable connector.
    3. Disconnect the K31 meter connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K56-6 (SWG) - K20-4 (EAU) Below 1 Ω
      K54-12 (ILL-) - K31-30 (TR) Below 1 Ω
      K56-6 (SWG) - Body ground 10 kΩ or higher
      K54-12 (ILL-) - Body ground 10 kΩ or higher
      5. Fig 5: Identifying Radio Receiver, Spiral Cable And Combination Meter Connector Terminals
      G05299510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO Next Step 

  6. CHECK WIRE HARNESS (MULTI-DISPLAY - BATTERY AND COMBINATION METER) 
    1. Disconnect the K46 display connector.
    2. Disconnect the K31 meter connector.
    3. Measure the voltage and resistance of the wire harness side connectors.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      K46-12 (ILL+) - Body ground Light control switch TAIL or HEAD 10 to 14 V

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K46-11 (ILL-) - K31-30(TR) Below 1 Ω
      K46-11 (ILL-) - Body ground 10 kΩ or higher
      4. Fig 6: Checking Wire Harness (Multi-Display - Battery And Combination Meter)
      G05311353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE 

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