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Inspection Procedure

  1. INSPECT ECU TERMINAL VOLTAGE (INPUT VOLTAGE) 
    1. Disconnect the E46 connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      E46-36 (+S) - Body ground Ignition switch ON 4.5 to 14 V

      HINT:

      If any of the ECUs specified in the wiring diagram supplied power to the combination meter, the combination meter will output a waveform.

      Result 

      RESULT REFERENCE

      Result Proceed to
      OK A
      NG (for TMC Made) B
      NG (except for TMC Made) C

      B: Go to step  5

      C: Go to step  12

      Fig 1: Identifying Combination Meter Connector Terminal
      G06014513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      A: Go to next step 

  2. INSPECT COMBINATION METER (OUTPUT VOLTAGE) 
    1. Reconnect the E46 connector.
      Fig 2: Identifying Skid Control ECU Connector Terminal
      G06014514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the A51*1 or A66*2 connector.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      A51-22 (SP1)(1) - Body ground Ignition switch ON 11 to 14 V
      A66-11 (SP1)(2) - Body ground Ignition switch ON 11 to 14 V
      (1) w/o VSC
      (2) w/ VSC

      NG: Go to step  4

      OK: Go to next step 

  3. INSPECT SKID CONTROL ECU (INPUT WAVEFORM) 
    1. Check the input waveform.
      1. Reconnect the A51 *1 or A66*2 connector.
        • *1:w/o VSC
        • *2:w/VSC
      2. Remove the combination meter with the connector(s) still connected.
      3. Connect the oscilloscope to terminals E46-35 (SI) and body ground.
      4. Turn the ignition switch to ON.
      5. Turn the wheel slowly.
      6. Check the signal waveform according to the condition(s) in the table below.
        ITEM CONDITION CHART

        Item Condition
        Tool setting 5 V/DIV., 20 ms./DIV.
        Vehicle condition Driving at approximately 12 mph (20 km/h)

        OK: 

        The waveform is displayed as shown in the illustration.

        HINT:

        When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

        Result 

        RESULT REFERENCE

        Result Proceed to
        OK A
        NG (w/o VSC) B
        NG (w/VSC) C

        B: REPLACE SKID CONTROL ECU (w/o VSC)  (See REMOVAL )

        Fig 3: Inspecting Skid Control ECU (Input Waveform)
        G06014515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        C: REPLACE SKID CONTROL ECU (w/VSC)  (See REMOVAL )

        A: REPLACE COMBINATION METER  (See REMOVAL )

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - SKID CONTROL ECU) 
    1. Disconnect the E46 connector.
      Fig 4: Combination Meter And Skid Control ECU Chart
      G06014516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      A51-22 (SP1)(1) - E46-35 (SI) Always Below 1 Ω
      A51-22 (SP1)(1) - Body ground Always 10 kΩ or higher
      A66-11 (SP1)(2) - E46-35 (SI) Always Below 1 Ω
      A66-11 (SP1)(2) - Body ground Always 10 kΩ or higher
      (1) w/o VSC
      (2) w/ VSC

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE COMBINATION METER  (See REMOVAL )

  5. CHECK HARNESS AND CONNECTOR (COMBINATION METER - NO. 4 JUNCTION BLOCK) 
    1. Disconnect the 4B connector.
      Fig 5: Identifying Front View Of Wire Harness Connector Terminal
      G06014517Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Resistance 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      E46-36 (+S) - 4B-8 Always Below 1 Ω
      4B-8 - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (NO. 4 JUNCTION BLOCK) 
    1. Inspect for a short in the circuit that is connected to the combination meter shown in the wiring diagram.

      HINT:

      If voltage is not present, the circuit (ECU) was possibly the malfunctioning circuit. This is the circuit that will be diagnosed by following the A step that follows.

      1. Disconnect 4A connector.
        Fig 6: Identifying No.4 Junction Block Connector Terminal
        G06014518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Measure the voltage according to the value(s) in the table below.

        Standard Voltage 

        VOLTAGE SPECIFICATION

        Tester Connection Condition Specified Condition
        4A-8(1) - Body ground Ignition switch ON 4.5 to 14 V
        4A-20 - Body ground Ignition switch ON 4.5 to 14 V
        4B-20(2) - Body ground Ignition switch ON 4.5 to 14 V
        4B-68 - Body ground Ignition switch ON 4.5 to 14 V
        (1) w/ Tire Pressure Warning System
        (2) w/ Smart Key System

        Result 

        RESULT REFERENCE

        Result Proceed to
        Voltage is not present in one circuit. A
        Voltage Is present In all the circuits. B

        NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 4 JUNCTION BLOCK) 

        OK: Go to next step 

  7. SYSTEM CHECK 
    1. Select the circuit that did not present the voltage in the step 6.

      Result 

      RESULT REFERENCE

      Tester Connection System that uses the circuit Proceed to
      4A-8(1) - Body ground Tire pressure warning System A
      4A-20 - Body ground SFI System B
      4B-20(2) - Body ground Starting System C
      4B-68 - Body ground Audio/visual System D
      (1) w/ Tire Pressure Warning System
      (2) w/ Smart Key System

      B: Go to step  9

      C: Go to step  10

      D: Go to step  11

      A: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU CIRCUIT) 
    1. Disconnect the E94 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E94-2 (SPD)(1) - Body ground Always 10 kΩ or higher
      (1) w/ Tire Pressure Warning System

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 7: Identifying Tire Pressure Warning ECU Connector Terminal
      G06014519Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: REPLACE TIRE PRESSURE WARNING ECU 

  9. CHECK HARNESS AND CONNECTOR (ECM CIRCUIT) 
    1. Disconnect the A50 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      A50-8 (SPD) - Body ground Always 10 kΩ or higher

      Result 

      RESULT REFERENCE

      Result Proceed to
      OK (for 2AZ-FE) A
      OK (for 2ZR-FE) B
      NG C
      Fig 8: Identifying ECM Connector Terminal
      G06014520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      B: REPLACE ECM (for 2ZR-FE)  (See REMOVAL )

      C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      A: REPLACE ECM (for 2AZ-FE)  (See REMOVAL )

  10. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU CIRCUIT) 
    1. Disconnect the 2C connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      2C-8 (SPD)(1) - Body ground Always 10 kΩ or higher
      (1) w/ Smart Key System

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 9: Identifying Main Body ECU Connector Terminal
      G06014521Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  11. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER CIRCUIT) 
    1. Disconnect the E26 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E26-3 (SPD) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 10: Identifying Radio Receiver Connector Terminal
      G06014522Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: REPLACE RADIO RECEIVER  (See REMOVAL )

  12. CHECK HARNESS AND CONNECTOR 
    1. Inspect for a short in the circuit that is connected to the combination meter shown in the wiring diagram.

      HINT:

      If voltage is not present, the circuit (ECU) was possibly the malfunctioning circuit.

      1. Disconnect the E26, E94*1, E100*2, E106*3, and 2E connectors.
        • *1: w/ Tire Pressure Warning System
        • *2: for Separate Type Amplifier System
        • *3: w/ Navigation System
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance 

        RESISTANCE REFERENCE

        Tester Connection Condition Specified Condition
        E46-36 (+S) - Body ground Always 10 kΩ or higher

        NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

        Fig 11: Identifying Combination Meter Connector Terminal
        G06014513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        OK: Go to next step 

  13. INSPECT RADIO RECEIVER (CHECK FOR A SHORT) 
    1. Disconnect the E26 connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Resistance 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      E26-3 (SPD) - Body ground Always 10 kΩ or higher

      NG: REPLACE RADIO RECEIVER  (See REMOVAL )

      Fig 12: Identifying Radio Receiver Connector Terminal
      G06014524Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  14. INSPECT TIRE PRESSURE WARNING ECU (CHECK FOR A SHORT) 

    HINT:

    If the vehicle does not equipped with the tire pressure warning system, proceed to the next step.

    1. Disconnect the E94 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E94-2 (SPD)(1) - Body ground Always 10 kΩ or higher
      (1) w/ Tire Pressure Warning System

      NG: REPLACE TIRE PRESSURE WARNING ECU 

      Fig 13: Identifying Tire Pressure Warning ECU Connector Terminal
      G06014525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  15. INSPECT STEREO COMPONENT AMPLIFIER (CHECK FOR A SHORT) 

    HINT:

    If the vehicle does not equipped with the stereo component amplifier, proceed to the next step.

    1. Disconnect the E100 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E100-11 (SPD)(1) - Body ground Always 10 kΩ or higher
      (1) for Separate Type Amplifier System

      NG: REPLACE STEREO COMPONENT AMPLIFIER  (See REMOVAL )

      Fig 14: Identifying Stereo Component Amplifier Connector Terminal
      G06014526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  16. INSPECT NAVIGATION RECEIVER ASSEMBLY (CHECK FOR A SHORT) 

    HINT:

    If the vehicle does not equipped with the navigation system, proceed to the next step.

    1. Disconnect the E106 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E106-3 (SPD)(1) - Body ground Always 10 kΩ or higher
      (1) w/ Navigation System

      NG: REPLACE NAVIGATION RECEIVER ASSEMBLY  (See REMOVAL )

      Fig 15: Identifying Navigation Receiver Assembly Connector Terminal
      G06014527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  17. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK) 
    1. Inspect for a short in the circuit that is connected to the combination meter shown in the wiring diagram.

      HINT:

      If voltage is not present, the circuit (ECU) was possibly the malfunctioning circuit. This is the circuit that will be diagnosed by following the A step that follows.

      1. Disconnect 2C, 2D, and 2E connector.
        Fig 16: Identifying Instrument Panel Junction Block Connector Terminal
        G06014528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Measure the voltage according to the value(s) in the table below.

        Standard Voltage 

        VOLTAGE SPECIFICATION

        Tester Connection Condition Specified Condition
        2C-8(1) - Body ground Ignition switch ON 4.5 to 14 V
        20-8 - Body ground Ignition switch ON 4.5 to 14 V
        2E-1(2) - Body ground Ignition switch ON 4.5 to 14 V
        (1) w/ Smart Key System
        (2) w/ Sliding Roof

        Result 

        RESULT REFERENCE

        Result Proceed to
        Voltage is not present in one circuit. A
        Voltage is present In all the circuits. B

        B: REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK) 

        A: Go to next step 

  18. SYSTEM CHECK 
    1. Select the circuit that did not present the voltage in the step 17.

      Result 

      RESULT REFERENCE

      Tester Connection System that uses the circuit Proceed to
      2D-8 - Body ground SFI System A
      2E-1(1) -Body ground Starting System B
      2C-8(2) - Body ground Sliding Roof Control System C
      (1) w/ Smart Key System
      (2) w/ Sliding Roof

      B: Go to step  20

      C: Go to step  21

      A: Go to next step 

  19. CHECK HARNESS AND CONNECTOR (ECM CIRCUIT) 
    1. Disconnect the A50 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      A50-8 (SPD) - Body ground Always 10 kΩ or higher

      Result 

      RESULT REFERENCE

      Result Proceed to
      OK (for 2AZ-FE) A
      OK (for 2ZR-FE) B
      NG C
      Fig 17: Identifying ECM Connector Terminal
      G06014520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      B: REPLACE ECM (for 2ZR-FE)  (See REMOVAL )

      C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      A: REPLACE ECM (for 2AZ-FE)  (See REMOVAL )

  20. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU CIRCUIT) 
    1. Disconnect the 2C connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      2C-8 (SPD)(1) - Body ground Always 10 kΩ or higher
      (1) w/ Smart Key System

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 18: Identifying Main Body ECU Connector Terminal
      G06014521Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: REPLACE MAIN BODY ECU 

  21. CHECK HARNESS AND CONNECTOR (SLIDING ROOF CONTROL ECU CIRCUIT) 
    1. Disconnect the 011 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      O11-8 (SPD)(1) -Body ground Always 10 kΩ or higher
      (1) w/ Sliding Roof

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 19: Identifying Sliding Roof Control ECU Connector Terminal
      G06014531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: REPLACE SLIDING ROOF CONTROL ECU  (See REMOVAL )

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