LIGHTING SYSTEM Back-up Light Circuit

DESCRIPTION

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

WIRING DIAGRAM

B001KI2E04

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK FOR DTC (HYBRID CONTROL SYSTEM)


    1. Check for DTCs.

      Click here

      OK
      DTCs are not output.

    NG

    GO TO HYBRID CONTROL SYSTEM Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - POWER SOURCE 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 Connector Condition Specified Condition
      1H-7 (BATT) - Body ground Power switch off 11 to 14 V
      1G-14 (IG1) - Body ground Power switch on (IG) 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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the A19 power management control ECU connector.

    2. 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) or A19-15 (BL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - REAR LIGHT ASSEMBLY)


    1. Disconnect the V16 rear light assembly LH connector.*1

    2. Disconnect the V15 rear light assembly RH connector.*2


      • *1: for LHD without Rear Fog Light or RHD

      • *2: for RHD without Rear Fog Light or LHD

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-3 (BCK1) - V16-1 (B/U)*1 Always Below 1 Ω
      1G-3 (BCK1) - V15-1 (B/U)*2 Always Below 1 Ω
      1G-3 (BCK1) or V16-1 (B/U) - Body ground*1 Always 10 kΩ or higher
      1G-3 (BCK1) or V15-1 (B/U) - Body ground*2 Always 10 kΩ or higher

      • *1: for LHD without Rear Fog Light or RHD

      • *2: for RHD without Rear Fog Light or LHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE NO. 1 INTEGRATION RELAY


    1. Replace the No. 1 integration relay with a new or a known good one.

      Click here

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

      OK
      The back-up lights operate normally.

    OK

    END (NO. 1 INTEGRATION RELAY WAS DEFECTIVE)

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here