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Inspection Procedure

  1. CHECK OPERATION OF SPEEDOMETER 
    1. Drive the vehicle and check if the function of the speedometer on the combination meter is normal.

      OK: Actual vehicle speed and the speed indicated on the speedometer are the same. 

      HINT:

      The vehicle speed sensor is functioning normally when the indication on the speedometer is normal.

    NG:  Go to COMBINATION METER SYSTEM

    OK: Go to next step. 

  2. INSPECT NAVIGATION RECEIVER ASSEMBLY 
    1. Disconnect the navigation receiver assembly connector R12.
    2. Measure the voltage.
      1. Jack up either one of the drive wheels.
      2. Move the shift lever to the neutral position.
      3. Turn the ignition switch to the ON position.
        Fig 1: Identifying Navigation Receiver Assembly Connector R12
        G05141385Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Measure the voltage between terminal SPD of the navigation receiver assembly and body ground when the drive wheels are turned slowly.

        OK: Voltage pulses as shown in the illustration. 

      3. Fig 2: Voltage Pulses Graph
      G04967013Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE NAVIGATION RECEIVER ASSEMBLY 

    NG: Go to next step. 

  3. CHECK HARNESS AND CONNECTOR (COMBINATION METER - NAVIGATION RECEIVER ASSEMBLY) 
    1. Disconnect the navigation receiver assembly connector R12 and combination meter connector C10.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester connection Condition Specified condition
      SPD - C10-36 Ignition switch off Below 1 Ω
      3. Fig 3: Checking Combination Meter - Navigation Receiver Assembly Wire Harness Terminals
      G05141387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step. 

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - NAVIGATION RECEIVER ASSEMBLY) 
    1. Disconnect the navigation receiver assembly connector R12 and combination meter connector C10.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester connection Condition Specified condition
      SPD - Body ground Ignition switch off 10 kΩ or higher

      HINT:

      If the resistance between terminal SPD and body ground is less than 10 kΩ, there may be a short in a wire harness, connector, or an ECU.

      3. Fig 4: Checking Combination Meter - Navigation Receiver Assembly Wire Harness Terminals
      G05141387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OR CHECK EACH ECU 

    OK: REPLACE COMBINATION METER 

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