PARKING ASSIST MONITOR SYSTEM "CHK" message(s) are displayed on the SIGNAL CHECK screen.

DESCRIPTION

On the SIGNAL CHECK screen, it is possible to check if the signals sent to the parking assist ECU are normal Click here.

Tech Tips


  • On the SIGNAL CHECK screen, "OK" (blue) is displayed for items with a normal inspection result or input state.

  • On the SIGNAL CHECK screen, "CHK" (red) is displayed for items with an abnormal inspection result or input state.

  • Displayed items may differ depending on vehicle specifications.

Item Signal Input Method Detail DTC Output when Abnormal Result is Displayed Signal Receiver
SPEED CAN communication Speed signal input DTC is output Combination meter assembly
CAMERA SW Vehicle wire harness Steering pad switch assembly (wide view front and side monitor switch) signal input DTC is not output Steering pad switch assembly (wide view front and side monitor switch)
BCTY CAN communication Status of CAN communication with main body ECU DTC is output Main body ECU
MIRROR SW Vehicle wire harness Outer rear view mirror retract signal input DTC is output Outer mirror switch assembly
SHIFT Vehicle wire harness Shift signal input DTC is output

  • Park/neutral position switch assembly*1

  • Back-up light switch assembly*2
STR SIG CAN communication Steering angle sensor signal input DTC is output Spiral cable sub-assembly
HANDLE CAN communication Steering position signal input DTC is output ECM
BODY CAN communication Body size signal DTC is output ECM
DEST CAN communication Destination information signal input DTC is output ECM
BRAND CAN communication TOYOTA/LEXUS brand signal DTC is output ECM
MTM - Multi-terrain monitor signal DTC is output Individual setting
WFS SET Vehicle wire harness

  • Wide view front and side monitor switch signal

  • Front television camera and side television camera feedback signal

 DTC is output

  • Steering pad switch assembly (wide view front and side monitor switch)

  • Front passenger side television camera assembly*3

  • Front television camera assembly*3
T/M CAN communication Transmission type signal DTC is output ECM

WIRING DIAGRAM

A00K0GEE01

INSPECTION PROCEDURE

Note


  • When "System initializing" is displayed on the display and navigation module display after the battery cable is disconnected, correct the steering angle neutral point Click here.

  • Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the parking assist monitor system may be needed Click here.

PROCEDURE


  1. CHECK DISPLAY CHECK MODE


    1. A00JUZV

      Check which items display "CHK" (red) on the SIGNAL CHECK screen.

      Result
      Result Proceed to
      "CAMERA SW" displays "CHK" (red) A
      "MIRROR SW" displays "CHK" (red)* B
      "SHIFT" displays "CHK" (red) C
      "MTM" or "WFM SET" displays "CHK" (red)* D
      "SPEED", "BCTY", "STR SIG", "HANDLE", "BODY", "DEST", "BRAND" or "T/M" displays "CHK" (red) E

      • *: w/ Side Monitor System


    B

    CHECK POWER MIRROR CONTROL SYSTEM (POWER RETRACT MIRROR FUNCTION) Click here

    C

    CHECK PARKING ASSIST ECU Click here

    D

    CHECK PARKING ASSIST MONITOR SYSTEM Click here

    E

    CHECK FOR DTC Click here

    A

  2. INSPECT STEERING PAD SWITCH ASSEMBLY (WIDE VIEW FRONT AND SIDE MONITOR SWITCH)


    1. Remove the steering pad switch assembly Click here.

      A00JUU0E11
      Text in Illustration
      *a Wide View Front and Side Monitor Switch - -

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      7 (+DP) - 3 (GND1) Wide view front and side monitor switch pushed Below 2.5 Ω
      7 (+DP) - 3 (GND1) Wide view front and side monitor switch not pushed 95 to 105 kΩ

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  3. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. A00JW9BE51
      Text in Illustration
      *a Steering Pad Switch Side
      *b Vehicle Side

      Remove the spiral cable sub-assembly Click here.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      7 (+DP) - 3 (+DP) Spiral cable is turned 2.5 rotations counterclockwise Below 1 Ω
      Spiral cable is centered
      Spiral cable is turned 2.5 rotations clockwise
      3 (GND1) - 10 (GND1) Spiral cable is turned 2.5 rotations counterclockwise
      Spiral cable is centered
      Spiral cable is turned 2.5 rotations clockwise

      CAUTION:

      The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the Precaution in the SRS section Click here.


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - BODY GROUND)


    1. A00K0ESE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly)

      Disconnect the G40 spiral cable sub-assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G40-10 (GND1) - Body ground Always Below 1 Ω

    NG

    CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - DRIVING SUPPORT SWITCH CONTROL ECU) Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - PARKING ASSIST ECU)


    1. Disconnect the G40 spiral cable sub-assembly connector.

    2. Disconnect the I3 parking assist ECU connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G40-3 (+DP) - I3-23 (BLSW) Always Below 1 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE PARKING ASSIST ECU Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE PARKING ASSIST ECU Click here

  6. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - DRIVING SUPPORT SWITCH CONTROL ECU)


    1. Disconnect the G40 spiral cable sub-assembly connector.

    2. Disconnect the G76 driving support switch control ECU connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G40-10 (GND1) - G76-4 (SWI2) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. REPLACE DRIVING SUPPORT SWITCH CONTROL ECU


    1. Replace the driving support switch control ECU with a new or normally functioning one Click here.

    2. Check that "CAMERA SW" displays "OK" on the SIGNAL CHECK screen.

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE PARKING ASSIST ECU Click here

    C

    REPLACE PARKING ASSIST ECU Click here

    A

    END (DRIVING SUPPORT SWITCH CONTROL ECU IS DEFECTIVE)

  8. CHECK POWER MIRROR CONTROL SYSTEM (POWER RETRACT MIRROR FUNCTION)


    1. Operate the mirror retract switch to check if the power retract mirror function of the outer rear view mirror assembly (passenger side) operates normally Click here.

      Result
      Result Proceed to
      Power retract mirror function is normal A
      Power retract mirror function is abnormal B

    B

    GO TO POWER MIRROR CONTROL SYSTEM Click here

    A

  9. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - OUTER MIRROR SWITCH)


    1. Disconnect the I3 parking assist ECU connector.

    2. Disconnect the G11 outer mirror switch assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I3-10 (MPOS) - G11-14 (MF) Always Below 1 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE PARKING ASSIST ECU Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE PARKING ASSIST ECU Click here

  10. CHECK PARKING ASSIST ECU


    1. A00JYWZE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Parking Assist ECU)

      Disconnect the I3 parking assist ECU connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      I3-15 (REV) - Body ground Ignition switch ON, shift lever in R 11 to 14 V
      I3-15 (REV) - Body ground Ignition switch ON, shift lever in any position except R Below 1 V
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for Automatic Transmission) C
      NG (for Manual Transmission) D

    B

    REPLACE PARKING ASSIST ECU Click here

    C

    CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - PARK/NEUTRAL POSITION SWITCH) Click here

    D

    CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BACK-UP LIGHT SWITCH) Click here

    A

    REPLACE PARKING ASSIST ECU Click here

  11. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - PARK/NEUTRAL POSITION SWITCH)


    1. Disconnect the I3 parking assist ECU connector.

    2. Disconnect the C40 park/neutral position switch assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I3-15 (REV) - C40-1 (RL) Always Below 1 Ω
      I3-15 (REV) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

  12. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BACK-UP LIGHT SWITCH)


    1. Disconnect the I3 parking assist ECU connector.

    2. Disconnect the C41 back-up light switch assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I3-15 (REV) - C41-1 Always Below 1 Ω
      I3-15 (REV) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

  13. CHECK PARKING ASSIST MONITOR SYSTEM


    1. Check if the side monitor system or wide view front monitor system has the problem.

      Result
      Result Proceed to
      Side monitor system has problem A
      Wide view front monitor system has problem B

    B

    GO TO WIDE VIEW FRONT MONITOR SYSTEM Click here

    A

    GO TO SIDE MONITOR SYSTEM Click here