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Speed Signal Circuit [10/2014 - 10/2015]: Procedure

  1. INSPECT COMBINATION METER ASSEMBLY (INPUT VOLTAGE) 
    1. Disconnect the D9 combination meter assembly connector.
      GTY544924Courtesy 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
      D9-9 (+S) - Body ground Power switch on (IG) 4.5 to 14 V
      TEXT IN ILLUSTRATION

      *a Rear 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 

    See step  5

    Result: 

    OK 

    See step  2

  2. INSPECT COMBINATION METER ASSEMBLY (OUTPUT VOLTAGE) 
    1. Reconnect the D9 combination meter assembly connector.
    2. Disconnect the A51 brake booster with master cylinder assembly (skid control ECU) connector.
      GTY542069Courtesy 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
      A51-11 (SP1) - Body ground Power switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Brake Booster with Master Cylinder Assembly (Skid Control ECU))

    Result: 

    NG 

    See step  4

    Result: 

    OK 

    See step  3

  3. INSPECT SKID CONTROL ECU (INPUT WAVEFORM) 
    1. Check the input waveform.
      GTY575483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Reconnect the A51 brake booster with master cylinder assembly (skid control ECU) connector.
      2. Remove the combination meter assembly with the connector(s) still connected.
      3. Connect an oscilloscope to terminal D9-8 (SI) and body ground.
      4. Turn the power switch on (IG).
      5. Turn a 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 Power switch on (IG), wheel being rotated

        OK

        The waveform is similar to that shown in the illustration.

        TEXT IN ILLUSTRATION

        *a Component with harness connected
        (Combination Meter Assembly)

        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 

    REPLACE COMBINATION METER ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU) 

    (Refer to REMOVAL [10/2014 - ] )

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - SKID CONTROL ECU) 
    1. Disconnect the D9 combination meter assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D9-8 (SI) - A51-11 (SP1) Always Below 1 Ω
      D9-8 (SI) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 6 JUNCTION CONNECTOR) 
    1. Disconnect the D100 No. 6 junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D9-9 (+S) - D100-1 Always Below 1 Ω
      D9-9 (+S) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (NO. 6 JUNCTION CONNECTOR) 
    1. Inspect for a short in the wire harnesses and connectors connected to the No. 6 junction 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. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Condition Specified Condition
        D100-2 - Body ground Power switch on (IG) 4.5 to 14 V
        D100-3 - Body ground Power switch on (IG) 4.5 to 14 V
        D100-4 - Body ground Power switch on (IG) 4.5 to 14 V
        D100-5 - Body ground Power switch on (IG) 4.5 to 14 V
        D100-9 - Body ground Power switch on (IG) 4.5 to 14 V

        Result

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

    Result: 

    B 

    REPLACE INSTRUMENT PANEL WIRE (NO. 6 JUNCTION CONNECTOR) 

    Result: 

    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
      D100-2 - Body ground Smart key system A
      D100-5 - Body ground Auto wiper system*1 B
      D100-3 - Body ground Automatic headlight beam level control system*2 C
      D100-9 - Body ground Audio and visual system*3, *4, Navigation system*3, *5 or Safety connect system*6 D
      D100-4 - Body ground Vehicle proximity notification system E
      • *1: w/ Auto Wiper System
      • *2: w/ Automatic Headlight Beam Level Control System
      • *3: for Radio and Display Type
      • *4: for 11 Speakers
      • *5: for Navigation Receiver Type
      • *6: w/ Manual (SOS) Switch

    Result: 

    B 

    See step  9

    Result: 

    C 

    See step  10

    Result: 

    D 

    See step  11

    Result: 

    E 

    See step  15

    Result: 

    A 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU CIRCUIT) 
    1. Disconnect the D104 power management control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D104-14 (SPDI) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE POWER MANAGEMENT CONTROL ECU 

    (Refer to REMOVAL [10/2014 - 10/2015] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY CIRCUIT) 
    1. Disconnect the D54 windshield wiper relay assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D54-24 (SPD) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE WINDSHIELD WIPER RELAY ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  10. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY CIRCUIT) 
    1. Disconnect the A24 headlight leveling ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A24-16 (SPDR) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  11. 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
      D100-9 - Body ground Audio and visual system*1 A
      Safety connect system*2 B
      Audio and visual system*3 or Navigation system*3, *4 C
      • *1: for 11 Speakers
      • *2: w/ Manual (SOS) Switch
      • *3: for Radio and Display Type
      • *4: for Navigation Receiver Type

    Result: 

    B 

    See step  13

    Result: 

    C 

    See step  14

    Result: 

    A 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY CIRCUIT) 
    1. Disconnect the E10 stereo component amplifier assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E10-11 (SPD) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  13. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) CIRCUIT) 
    1. Disconnect the E11 DCM (telematics transceiver) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E11-10 (SPDP) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  14. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY CIRCUIT, NAVIGATION ECU SUB-ASSEMBLY CIRCUIT) 
    1. Disconnect the E5*1 radio and display receiver assembly or E20*2 navigation ECU sub-assembly connector.
      • *1: for Radio and Display Type
      • *2: for Navigation Receiver Type
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      for Radio and Display Type 

      Tester Connection Condition Specified Condition
      E5-17 (SPD) - Body ground Always 10 kΩ or higher

      for Navigation Receiver Type 

      Tester Connection Condition Specified Condition
      E20-17 (SPD) - Body ground Always 10 kΩ or higher

      Result

      Result Proceed to
      OK (for Radio and Display Type) A
      OK (for Navigation Receiver Type) B
      NG C

    Result: 

    A 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    B 

    REPLACE NAVIGATION ECU SUB-ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  15. CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER CIRCUIT) 
    1. Disconnect the D108 vehicle approaching speaker controller connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D108-6 (SPD) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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