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Home >> Lexus >> 2008 >> IS 250 AWD >> Repair and Diagnosis >> Accessories & Equipment >> Warning Systems >> Park Assist / Monitoring >> Rear View Monitor System >> Reverse Signal Circuit >> Inspection Procedure

Inspection Procedure

  1. CHECK BACK-UP LIGHT 
    1. Move the shift lever to the R position and check if the back-up light comes on.

      OK: The back-up light comes on. 

    NG:  GO TO LIGHTING SYSTEM

    OK: Go to next step 

  2. CHECK VEHICLE SIGNAL (DISPLAY CHECK MODE) 
    1. Enter the "Display Check" mode (Vehicle Signal Check Mode) (See DISPLAY CHECK MODE ).
    2. Check that the display changes between ON and OFF according to the shift lever operation (P and R).

      OK 

      SHIFT LEVER POSITION CHART

      Shift Lever Position Display
      R ON
      Except R OFF
      Fig 1: Screen Display - Display Check
      G05190199Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      This display is updated once per second. As a result, it is normal for the display to leg behind the actual change in the switch.

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

    NG: Go to next step 

  3. INSPECT MULTI-DISPLAY 
    1. Disconnect the multi-display connector J50.
    2. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      REV - Body ground Engine switch is on (IG).
      Shift lever is moved to R position.
      10 to 14 V
      REV - Body ground Engine switch is on (IG).
      Shift lever is moved to any position except R.
      Below 1 V
    3. Fig 2: Disconnecting Multi-Display Connector J50
      G05832785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE MULTI-DISPLAY 

    NG: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COWL SIDE J/B LH) 
    1. Disconnect the multi-display connector J50 and cowl side J/B LH connector Q2.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      REV - BACK Always Below 1 Ω
      REV - Body ground Always 10 kΩ or higher
    3. Fig 3: Checking Harness And Connector (Multi-Display - Cowl Side J/B LH)
      G05832786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - COWL SIDE J/B LH) 
    1. Disconnect the main body ECU LH (cowl side J/B LH) connector LJ.
    2. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      BKUP - Body ground Engine switch is on (IG).
      Shift lever is moved to R position.
      10 to 14 V
      BKUP - Body ground Engine switch is on (IG).
      Shift lever is moved to any position except R.
      Below 1 V
    3. Fig 4: Checking Harness And Connector (Junction Connector - Cowl Side J/B LH)
      G05832787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE COWL SIDE JUNCTION BLOCK LH