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Home >> Lexus >> 2006 >> RX 330 FWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Navigation >> Navigation System >> Vehicle Speed Signal Circuit between Multi-display and Combination Meter >> Inspection Procedure

Inspection Procedure

  1. CHECK OPERATION OF SPEEDOMETER 
    1. Drive the vehicle and check if the function of the speedometer in 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 MULTI-DISPLAY 
    1. Disconnect the multi-display connector M5.
    2. Measure 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: Disconnecting Multi-Display Connector M5
        G04092995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Measure the voltage between terminal SPD of the multi-display and body ground when the drive wheels are turned slowly.
        Fig 2: View Of Voltage Pulses/Blinking Pattern
        G04050156Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        OK: Voltage pulses as shown in the illustration. 

    OK: REPLACE MULTI-DISPLAY 

    NG: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (COMBINATION METER - MULTI-DISPLAY) 
    1. Disconnect the multi-display connector M5 and combination meter connector C8.
    2. Measure the resistance according to the value(s) in the table below.

    Resistance 

    TERMINALS RESISTANCE SPECIFICATION

    Tester connection Condition Specified Condition
    SPD - C8-6 Ignition switch OFF Below 1 Ω
    Fig 3: Disconnecting Multi-Display Connector M5 And Combination Meter Connector C8
    G04092997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - MULTI-DISPLAY) 
    1. Disconnect the multi-display connector M5 and combination meter connector C8.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TERMINALS RESISTANCE SPECIFICATION

      Tester connection Condition Specified Condition
      SPD - Body ground Ignition switch OFF 10 kΩ or higher
      Fig 4: Disconnecting Multi-Display Connector M5 And Combination Meter Connector C8
      G04092998Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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 ECU.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU 

    OK: REPLACE COMBINATION METER