LIGHTING SYSTEM Back-up Light does not Illuminate

WIRING DIAGRAM

A001EOJE03

CAUTION / NOTICE / HINT

Note

First perform the communication function inspections in HOW TO PROCEED WITH TROUBLESHOOTING to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (BACK-UP LIGHT)


    1. Using the GTS, perform the Active Test Click here.

      Body No. 4
      Tester Display Test Part Control Range
      Backup Light Back-up light operation OFF - ON
      OK
      Back-up light condition is switched by Active Test.

    OK

    GO TO AUTOMATIC TRANSMISSION SYSTEM Click here

    NG

  2. CHECK REAR JUNCTION BLOCK ECU (BCK1 VOLTAGE)

    A001AOZE18
    *1 Component without harness connected: (Rear Junction Block ECU)

    1. Disconnect the S63 ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      1 (BCK1) - Body ground Engine switch on (IG), shift lever in R position 11 to 14 V

      Note

      Do not start the engine.


    NG

    REPLACE LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)

    OK

  3. CHECK HARNESS AND CONNECTOR (REAR JUNCTION BLOCK ECU - REAR LIGHT AND BODY GROUND)

    A001AC7E01

    1. Disconnect the S63 rear junction block ECU connector.

    2. Disconnect the S33*1 or S41*2 rear light connector.


      • *1: for LH

      • *2: for RH

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      S63-1 (BCK1) - S33-3 (B) Always Below 1 Ω
      S33-4 (E) - Body ground Always Below 1 Ω
      S63-1 (BCK1) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      S63-1 (BCK1) - S41-3 (B) Always Below 1 Ω
      S41-4 (E) - Body ground Always Below 1 Ω
      S63-1 (BCK1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT REAR LIGHT SOCKET AND WIRE

    A001DRUE03

    1. Remove the rear light socket and wire Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (B) - 3 Always Below 1 Ω
      4 (E) - 4 Always Below 1 Ω
      3 (B) - 4 (E) Always 10 kΩ or higher

    OK

    REPLACE REAR LIGHT ASSEMBLY Click here

    NG

    REPLACE REAR LIGHT SOCKET AND WIRE Click here