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Home >> Lexus >> 2005 >> GX 470 >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (LEXUS Night View System - Diagnostics) >> Circuit Inspection >> 6. Screen is white >> Inspection Procedure

Inspection Procedure

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  1. Check the windshield glass in front of Night View Camera. 

    OK: 

    Windshield glass is clean. 

    HINT:

    Night View Camera Cleaning Method (see PRE-CHECK  ).

    1. NG: Clean the windshield glass (Dirt on the windshield glass). 
    2. OK: Go to Next Step. 
  2. Check Night View Camera using SST. 

    PREPARATION: 

    1. Remove the over head junction (map light cover).
    2. Remove the connector from the Night View Camera.
    3. Connect SST to the wire harness of the Night View Camera on the body side as shown in the illustration.

      SST 09991-00610

      Fig 1: Connecting SST To Wire Harness Of Night View Camera
      G02987713Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Turn the ignition switch ON.
    5. Switch to Inspection Mode (See PRE-CHECK  ).

    CHECK: 

    Check the screen of the Night View Display.

    OK: 

    1. levels of Black-White shade intensity displayed. 
    1. NG: Go to step 3. 
    2. OK: Replace Night View Camera. 
  3. Check voltage between terminal VGL of Night View ECU connector "C" and body ground. 

    PREPARATION: 

    1. Remove the combination meter.
    2. Turn the ignition switch ON.

    CHECK: 

    Fig 2: Locating Vehicle Wire Connector
    G02987714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Measure voltage between terminal VGL of the Night View ECU connector "C" and body ground.

    (Terminals of ECU: See TERMINALS OF ECU  )

    OK: 

    1. Voltage: 
    2. VGL: -15 to -17 V 
    3. (Terminal voltages must meet the specified value between 0 and 20 seconds after ignition switch is ON.) 
    Fig 3: Identifying Night View ECU Connector C Terminal VGL
    G02987715Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   7 
    2. OK: Go to Next Step. 
  4. Check voltage between terminal VDD of Night View ECU connector "C" and body ground. 

    PREPARATION: 

    Ignition switch ON.

    CHECK: 

    Fig 4: Locating Vehicle Wire Connector
    G02987716Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Measure voltage between terminal VDD of the Night View ECU connector "C" and body ground.

    (Terminals of ECU: See TERMINALS OF ECU  )

    OK: 

    1. Voltage: 
    2. VDD: 4.75 to 5.25 V 
    3. (Terminal voltages must meet the specified value between 0 and 20 seconds after ignition switch is ON.) 
    Fig 5: Identifying Night View ECU Connector C Terminal VDD
    G02987717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   7 
    2. OK: Go to Next Step. 
  5. Check voltage between terminal VGH of Night View ECU connector "C" and body ground. 

    PREPARATION: 

    Ignition switch ON.

    CHECK: 

    Fig 6: Locating Vehicle Wire Connector
    G02987718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Measure voltage between terminal VGH of the Night View ECU connector "C" and body ground.

    (Terminals of ECU: See TERMINALS OF ECU  )

    OK: 

    1. Voltage: 
    2. VGH: 17.4 to 18.6 V 
    3. (Terminal voltages must meet the specified value between 0 and 20 seconds after ignition switch is ON.) 
    Fig 7: Identifying Night View ECU Connector C Terminal VGH
    G02987719Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    RESULT: 

    VOLTAGE RESULT

    OK A (When not using oscilloscope)
    OK Reference < B (when using oscilloscope)
    NG C
    1. B: Go to step 6. 
    2. C: Go to step   7 
    3. A: Replace Night View ECU. 

    HINT:

    If the symptom still occurs, replace the Night View Display.

  6. Using an oscilloscope, check the output waveform between terminal VG of Night View ECU and body ground. 

    PREPARATION: 

    1. Ignition switch ON.
    2. Inspection Mode ON (See PRE-CHECK  ).

    CHECK: 

    Fig 8: Locating Vehicle Wire Connector
    G02987720Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Using an oscilloscope, check the output waveform between terminal VG of the Night View ECU connector "C" and body ground. (Terminals of ECU: See TERMINALS OF ECU  )

    Fig 9: Identifying Night View ECU Connector C Terminal VG
    G02987721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    The output waveform is as shown in the illustration. (Reference) oscilloscope condition: 

    OSCILLOSCOPE CONDITION

    Item Contents
    Tool setting 200 mV/DIV, 10 us / DIV
    Vehicle condition When Night View System starts up
    Fig 10: Oscilloscope Output Waveform
    G02987722Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Replace Night View Display. 
    2. OK: Replace Night View ECU. 
  7. Check voltage between terminal VGL of Night View ECU connector "B" and body ground. 

    PREPARATION: 

    Ignition switch ON.

    CHECK: 

    Fig 11: Locating Night View Display Connector
    G02987723Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Measure voltage between terminal VGL of the Night View ECU connector "B" and body ground.

    (Terminals of ECU: See TERMINALS OF ECU  )

    OK: 

    1. Voltage: 
    2. VGL: -15 to -17 V 
    3. (Terminal voltages must meet the specified value between 0 and 20 seconds after ignition switch is ON.) 
    Fig 12: Identifying Night View ECU Connector B Terminal VGL
    G02987724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   10 . 
    2. OK: Go to Next Step. 
  8. Check voltage between terminal VDD of Night View ECU connector "B" and body ground. 

    PREPARATION: 

    Ignition switch ON.

    CHECK: 

    Fig 13: Locating Night View Display Connector
    G02987725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Measure voltage between terminals VGL, VDD, VGH of the Night View ECU connector "B" and body ground.

    (Terminals of ECU: See TERMINALS OF ECU  )

    OK: 

    1. Voltage: 
    2. VDD: 4.75 to 5.25 V 
    3. (Terminal voltages must meet the specified value between 0 and 20 seconds after ignition switch is ON.) 
    Fig 14: Identifying Night View ECU Connector B Terminals VDD
    G02987726Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   10 . 
    2. OK: Go to Next Step. 
  9. Check voltage between terminal VGH of Night View ECU connector "B" and body ground. 

    PREPARATION: 

    Ignition switch ON.

    CHECK: 

    Fig 15: Locating Night View Display Connector
    G02987727Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Measure voltage between terminal VGH of the Night View ECU connector "B" and body ground.

    (Terminals of ECU: See TERMINALS OF ECU  )

    OK: 

    1. Voltage: 
    2. VGH: 17.4 to 18.6 V 
    3. (Terminal voltages must meet the specified value between 0 and 20 seconds after ignition switch is ON.) 
    Fig 16: Identifying Night View ECU Connector B Terminal VGH
    G02987728Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step 10. 
    2. OK: Replace Night View ECU. 
  10. Check wire harness between terminals VGL, VDD and VGH of Night View Battery ECU and Night View ECU (See  PROCEDURE  ). 

    PREPARATION: 

    Remove the wire harness between the Night View Battery ECU and the Night View ECU.

    Fig 17: Identifying Night View Battery ECU And Night View ECU Terminals VGL, VDD And VGH
    G02987729Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    CHECK: 

    Check the resistance between terminals VGL, VDD, and VGH of connector "D" and those of "B".

    (Terminals of ECU: See TERMINALS OF ECU  )

    OK: 

    1. Resistance: Less than 1 Ω 
    1. NG: Replace wire harness. 
    2. OK: Replace Night View Battery ECU. 
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