LIGHTING SYSTEM Back-up Light Circuit

DESCRIPTION

The power management control ECU receives shift position R signal and controls the back up light relay.

WIRING DIAGRAM

A01NGXVE02

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. INSPECT BACK UP LIGHT RELAY (BK/UP LP)


    1. A01NEVEE91

      Remove the back up light relay from the No. 2 engine room relay block.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      3 - 5 Voltage is not applied between terminals 1 and 2 10 kΩ or higher
      3 - 5 Voltage is applied between terminals 1 and 2 Below 1 Ω

    NG

    REPLACE BACK UP LIGHT RELAY

    OK

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


    1. A01NEWZE02
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the A80 power management control ECU connector.

    2. Remove the back up light relay from the No. 2 engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A80-15 (BL) - Relay terminal 1 Always Below 1 Ω
      A80-15 (BL) - Body ground Always 10 kΩ or higher
      Relay terminal 2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT POWER MANAGEMENT CONTROL ECU


    1. Reconnect the A80 power management control ECU connector.

    2. A01NFG1E01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block

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

      Standard Voltage
      Tester connection Condition Specified Condition
      Relay terminal 1 - Body ground Shift lever in R 11 to 14 V
      Relay terminal 1 - Body ground Shift lever not in R Below 1 V

    NG

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

    OK

  4. CHECK HARNESS AND CONNECTOR (BATTERY - RELAY)


    1. A01NFG1E01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block

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

      Standard Voltage
      Tester connection Condition Specified Condition
      Relay terminal 3 - Body ground Power switch on (IG) 11 to 14 V
      Relay terminal 3 - Body ground Power switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - RELAY)

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BULB - RELAY AND BODY GROUND)