REAR SUNSHADE SYSTEM Rear Sunshade Shift-linked Function does not Operate when Shift Lever is Moved to R Position

DESCRIPTION

When the ignition switch ON and the shift lever is moved to R, the shift position sensors send a reverse signal to the ECM. Then, the ECM sends this signal to the main body ECU (multiplex network body ECU) via CAN communication. When the rear sunshade relay receives this signal with the rear sunshade raised, the rear sunshade is lowered.

WIRING DIAGRAM

B006Z83E01
*a REV
*b Main Body ECU (Multiplex Network Body ECU)
*c Rear Window Shade Assembly
*d CAN Communication Line

CAUTION / NOTICE / HINT

Note


  • The rear sunshade system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting procedure.

    Click here

  • The shift-linked operation of the rear sunshade system operates only when the customize setting "R-pos to Rear Sun Shade COM" is set to "ON".

    Click here

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.*


    • *: w/ Smart Entry and Start System

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

    Click here


    • *: w/ Door Control Battery

PROCEDURE


  1. READ VALUE USING GTS (SHIFT SW STATUS (R RANGE))


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT*1 or Engine*2 / Data List.


      • *1: for 2AR-FE

      • *2: except 2AR-FE

    5. Read the Data List according to the display on the GTS.


      Powertrain > Engine and ECT > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Shift SW Status (R Range) Park/Neutral position switch assembly ON or OFF

      ON: Shift lever in R

      OFF: Shift lever not in R

      		 -

      Powertrain > Engine and ECT > Data List
      Tester Display
      Shift SW Status (R Range)

      Powertrain > Engine > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Shift SW Status (R Range) Park/Neutral position switch assembly ON or OFF

      ON: Shift lever in R

      OFF: Shift lever not in R

      		 -

      Powertrain > Engine > Data List
      Tester Display
      Shift SW Status (R Range)
      OK
      The GTS display changes according to the shift position selected by using the shift lever.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO SFI SYSTEM for 2AR-FE: Click here
    GO TO SFI SYSTEM for A25A-FKS: Click here
    GO TO SFI SYSTEM for 2GR-FKS: Click here

    OK

  2. PERFORM ACTIVE TEST USING GTS (REVERSE GEAR SIGNAL)


    1. Enter the following menus: Body Electrical / Main Body / Active Test.

    2. Perform the Active Test according to the display on the GTS.

      Tech Tips

      Make sure that the rear window shade assembly is raised before performing the Active Test.


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Reverse Gear Signal Reverse signal OFF/ON -

      Body Electrical > Main Body > Active Test
      Tester Display
      Reverse Gear Signal
      OK
      The rear window shade assembly is lowered.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

  3. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R64-3 (REV) - Body ground Ignition switch ON, shift lever in any position other than R → R 11 to 14 V → Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR WINDOW SHADE ASSEMBLY Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (REAR WINDOW SHADE ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the K51 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K51-6 (REV) - R64-3 (REV) Always Below 1 Ω
      K51-6 (REV) or R64-3 (REV) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR