LIGHTING SYSTEM Back-up Light Circuit

DESCRIPTION

The power management control ECU controls the back-up lights.

WIRING DIAGRAM

A01J8H4E01

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BATTERY AND BODY GROUND)


    1. A01J9I3E03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Integration Relay)

      Disconnect the 1H integration relay connector.

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

      Standard Voltage
      Tester Connector Condition Specified Condition
      1H-7 (BATT) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      1H-3 (GND2) - Body ground Always Below 1 Ω
    3. A01J9LAE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Integration Relay)

      Disconnect the 1G integration relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-22 (GND1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU)


    1. Reconnect the A21 power management control ECU connector.

    2. Disconnect the 1G integration relay connector.

    3. Disconnect the A21 power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-13 (BKUP) - A21-15 (BL) Always Below 1 Ω
      1G-13 (BKUP) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS OR CONNECTOR (INTEGRATION RELAY - REAR COMBINATION LIGHT ASSEMBLY)


    1. Disconnect the 1G integration relay connector.

    2. Disconnect the S18 or R17 rear combination light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-3 (BCK1) - S18-4 (B) Always Below 1 Ω
      1G-3 (BCK1) - R17-4 (B) Always Below 1 Ω
      1G-3 (BCK1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE INTEGRATION NO.1 RELAY


    1. Temporarily replace the integration relay with a new or normally functioning one Click here.

    2. Check that the back-up lights operate normally.

      OK
      The back-up lights operate normally.

    NG

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    OK

    END