FixVault
Home › Lexus › 2009 › IS 350 › Repair and Diagnosis › Accessories & Equipment › Warning Systems › Rear View Monitor (Diagnostics) › Rear View Monitor System › Reverse Signal Circuit › Procedure

Reverse Signal Circuit: 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). Refer to DISPLAY CHECK MODE .
      Fig 1: Screen Display - Vehicle Signal Check Mode
      GTY129535Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check that the display changes between ON and OFF according to the shift lever operation (P and R).

      OK

      Shift Lever Position Display
      R ON
      Except R OFF

      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.
      Fig 2: Identifying Multi-Display Connector J50
      GTY141903Courtesy 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
      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

    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.
      Fig 3: Identifying Connector Terminals
      GTY142530Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester connection Condition Specified condition
      REV - BACK Always Below 1 Ω
      REV - Body ground Always 10 kΩ or higher

    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.
      Fig 4: Identifying Connector Terminals
      GTY151262Courtesy 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
      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

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE COWL SIDE JUNCTION BLOCK LH 

About FixVault