LIGHTING SYSTEM Back-up Light does not Illuminate

WIRING DIAGRAM

A01H097E01

INSPECTION PROCEDURE

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.

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

    NG

    CHECK REAR JUNCTION BLOCK ECU (BCK1 VOLTAGE) Click here

    OK

    GO TO HYBRID CONTROL SYSTEM

  2. CHECK REAR JUNCTION BLOCK ECU (BCK1 VOLTAGE)

    A01GYF8E09

    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 Power switch ON (IG), shift lever in R position 11 to 14 V

      Note

      Do not start the engine or hybrid control system.


    NG

    REPLACE LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)

    OK

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

    A01GXF5E04

    1. Disconnect the S63 ECU connector.

    2. Disconnect the S33 and S41 light connectors.

    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

    REPLACE REAR LIGHT ASSEMBLY Click here