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LIGHTING SYSTEM Back-up Light Circuit

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DTC Code DTC Name
  Back-up Light Circuit
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DESCRIPTION

The hybrid vehicle control ECU controls the back-up lights.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

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PROCEDURE


  1. Click here

    CHECK FOR DTC (for HYBRID SYSTEM)


    1. Check for DTCs (Click here).

      OK
      DTCs is not output.

  2. Click here

    CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - AUXILIARY BATTERY AND BODY GROUND)


    1. Disconnect the 1G and 1H No. 1 integration relay connectors.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      1G-14 (IG1) - Body ground Power switch on (IG) 11 to 14 V
      1H-7 (BATT) - Body ground Power switch off 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-22 (GND1) - Body ground Always Below 1 Ω
      1H-3 (GND2) - Body ground Always Below 1 Ω

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    CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the 1G No. 1 integration relay connector.

    2. Disconnect the A19 power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-13 (BKUP) - A19-15 (BL) Always Below 1 Ω
      1G-13 (BKUP) - Body ground Always 10 kΩ or higher

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    CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY - RELAY AND BODY GROUND)


    1. Disconnect the 1G No. 1 integration relay connector.

    2. Disconnect the V2 or V9 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) - V2-2 (B/ U) Always Below 1 Ω
      1G-3 (BCK1) - V9-2 (B/ U) Always Below 1 Ω
      1G-3 (BCK1) - Body ground Always 10 kΩ or higher
      V2-3 (E) - Body ground Always Below 1 Ω
      V9-3 (E) - Body ground Always Below 1 Ω

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    REPLACE NO.1 INTEGRATION RELAY


    1. Replace the No. 1 integration relay with a new or a known good one (see pageClick here).

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

      OK
      The back-up lights operate normally.

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    END (NO. 1 INTEGRATION RELAY WAS DEFECTIVE)

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    GO TO HYBRID CONTROL SYSTEMClick here

  8. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    REPLACE POWER MANAGEMENT CONTROL ECUClick here