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Speed Signal Circuit [08/2014 - ]: Procedure

  1. INSPECT ECU TERMINAL VOLTAGE (INPUT VOLTAGE) 
    1. Disconnect the H19 connector.
      GTY531231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H19-40 (+S) - Body ground Power switch on (IG) 4.5 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Combination Meter Assembly)

      HINT: 

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

    Result:  NG

    NG 

    See step  5

    Result:  OK

    OK 

    See step  2

  2. INSPECT COMBINATION METER ASSEMBLY (OUTPUT VOLTAGE) 
    1. Reconnect the H19 connector.
    2. Disconnect the A61 connector.
      GTY537868Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A61-11 (SP1) - Body ground Power switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Skid Control ECU)

    Result:  NG

    NG 

    See step  4

    Result:  OK

    OK 

    See step  3

  3. INSPECT SKID CONTROL ECU (INPUT WAVEFORM) 
    1. Check the input waveform.
      GTY530490Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Reconnect the A61 connector.
      2. Remove the combination meter assembly with the connector(s) still connected.
      3. Connect an oscilloscope to terminal H19-39 (SI) and body ground.
      4. Turn the power switch on (IG).
      5. Turn the wheel slowly.
      6. Check the signal waveform according to the condition(s) in the table below.
        Item Condition
        Tool setting 5 V/DIV., 20 ms./DIV.
        Vehicle condition Wheel being rotated
        TEXT IN ILLUSTRATION

        *a Component with harness connected
        (Combination Meter Assembly)

        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:  OK

    OK 

    REPLACE COMBINATION METER ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  NG

    NG 

    REPLACE SKID CONTROL ECU 

    (See article. Refer to REMOVAL [08/2014 - ] )

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - SKID CONTROL ECU) 
    1. Disconnect the H19 and A61 connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A61-11 (SP1) - H19-39 (SI) Always Below 1 Ω
      A61-11 (SP1) - Body ground Always 10 kΩ or higher

    Result:  OK

    OK 

    REPLACE COMBINATION METER ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR) 
    1. Disconnect the junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H19-40 (+S) - H117-59 Always Below 1 Ω
      H19-40 (+S) - Body ground Always 10 kΩ or higher

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  OK

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR) 
    1. Inspect for a short in the circuit that is connected to the junction block connector shown in the wiring diagram.

      HINT: 

      If voltage is not present, it is possible that an ECU or circuit has a malfunction. The malfunctioning ECU or circuit will be diagnosed in the following steps.

      1. Disconnect the H117 connector.
        GTY528104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Condition Specified Condition
        H117-29 - Body ground Power switch on (IG) 4.5 to 14 V
        H117-19 - Body ground Power switch on (IG) 4.5 to 14 V
        H117-89 - Body ground Power switch on (IG) 4.5 to 14 V
        H117-57 - Body ground Power switch on (IG) 4.5 to 14 V
        H117-58 - Body ground Power switch on (IG) 4.5 to 14 V
        H117-79 - Body ground Power switch on (IG) 4.5 to 14 V
        H117-99 - Body ground Power switch on (IG) 4.5 to 14 V
        H117-69 - Body ground Power switch on (IG) 4.5 to 14 V
        TEXT IN ILLUSTRATION

        *a Front view of wire harness connector
        (to Junction Connector)

        Result

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

    Result:  B

    B 

    REPLACE JUNCTION CONNECTOR 

    Result:  A

    A 

    See step  7

  7. SYSTEM CHECK 
    1. Select the circuit for which voltage was not present in step 6.

      Result

      Tester Connection System that Uses the Circuit Proceed to
      H117-29 - Body ground Hybrid Control System A
      H117-19 - Body ground Wiper and Washer System*1 B
      H117-58 - Body ground Lighting System*2 C
      H117-57 - Body ground Tire Pressure Warning System D
      H117-79 - Body ground Safety Connect System*4 E
      H117-89 - Body ground Audio/Visual System*5 E
      H117-99 - Body ground Audio/Visual System*6 or Navigation System*7 E
      H117-69 - Body ground Vehicle Proximity Notification System*3 E
      • *1: w/ Auto Wiper System
      • *2: w/ Automatic Type Headlight Beam Level Control
      • *3: w/ Vehicle Proximity Notification System
      • *4: w/ Manual (SOS) Switch
      • *5: except 6 Speakers
      • *6: w/o Navigation System
      • *7: w/ Navigation System

    Result:  B

    B 

    See step  9

    Result:  C

    C 

    See step  10

    Result:  D

    D 

    See step  11

    Result:  E

    E 

    See step  12

    Result:  A

    A 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU CIRCUIT) 
    1. Disconnect the H3 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H3-14 (SPDI) - Body ground Always 10 kΩ or higher

    Result:  OK

    OK 

    REPLACE POWER MANAGEMENT CONTROL ECU 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY CIRCUIT) 
    1. Disconnect the H75 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H75-19 (SPD) - Body ground Always 10 kΩ or higher

    Result:  OK

    OK 

    REPLACE WINDSHIELD WIPER RELAY ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  10. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY CIRCUIT) 
    1. Disconnect the A46 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A46-16 (SPDR) - Body ground Always 10 kΩ or higher

    Result:  OK

    OK 

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  11. CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU CIRCUIT, TIRE PRESSURE WARNING ECU AND RECEIVER CIRCUIT) 
    1. Disconnect the H10*1 or P33*2 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H10-2 (SPD)*1 - Body ground Always 10 kΩ or higher
      P33-2 (SPD)*2 - Body ground Always 10 kΩ or higher
      • *1: w/ Vehicle Proximity Notification System
      • *2: w/o Vehicle Proximity Notification System

      Result

      Result Proceed to
      OK (w/ Vehicle Proximity Notification System) A
      OK (w/o Vehicle Proximity Notification System) B
      NG C

    Result:  A

    A 

    REPLACE TIRE PRESSURE WARNING ECU 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  B

    B 

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  C

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  12. SYSTEM CHECK 
    1. Select the circuit for which voltage was not present in step 6.

      Result

      Tester Connection System that Uses the Circuit Proceed to
      H117-79 - Body ground Safety Connect System*1 A
      H117-89 - Body ground Audio/Visual System*2 B
      H117-99 - Body ground Audio/Visual System*3 or Navigation System*4 C
      H117-69 - Body ground Vehicle Proximity Notification System*5 D
      • *1: w/ Manual (SOS) Switch
      • *2: except 6 Speakers
      • *3: w/o Navigation System
      • *4: w/ Navigation System
      • *5: w/ Vehicle Proximity Notification System

    Result:  B

    B 

    See step  14

    Result:  C

    C 

    See step  15

    Result:  D

    D 

    See step  16

    Result:  A

    A 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) CIRCUIT) 
    1. Disconnect the H67 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H67-10 (SPDP) - Body ground Always 10 kΩ or higher

    Result:  OK

    OK 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  14. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY CIRCUIT) 
    1. Disconnect the H157*1, *2 or H168*3 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H157-17 (SPD)*1, *2 - Body ground Always 10 kΩ or higher
      H168-11 (SPD)*3 - Body ground Always 10 kΩ or higher
      • *1: w/ Navigation System
      • *2: for Radio and Display Type with Parking Assist Monitor System (w/ Parallel Parking Assist Function)
      • *3: for Radio and Display Type with Parking Assist Monitor System (w/o Parallel Parking Assist Function)

    Result:  OK

    OK 

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  15. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY CIRCUIT) 
    1. Disconnect the H47*1, H164*2 or H140*3, *4 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H47-17 (SPD)*1 - Body ground Always 10 kΩ or higher
      H164-17 (SPD)*2 - Body ground Always 10 kΩ or higher
      H140-56 (SPD)*3, *4 - Body ground Always 10 kΩ or higher
      • *1: Radio Receiver Type
      • *2: for Radio and Display Type with Parking Assist Monitor System (w/o Parallel Parking Assist Function)
      • *3: for Radio and Display Type with Parking Assist Monitor System (w/ Parallel Parking Assist Function)
      • *4: w/ Navigation System

      Result

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

    Result:  A

    A 

    REPLACE RADIO RECEIVER ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  B

    B 

    REPLACE RADIO RECEIVER ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  C

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  16. CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER CIRCUIT) 
    1. Disconnect the H138 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H138-6 (SPD) - Body ground Always 10 kΩ or higher

    Result:  OK

    OK 

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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