LIGHTING SYSTEM Back-up Light Circuit

DESCRIPTION

The hybrid vehicle control ECU controls the back-up lights via the BKUP LP relay.

WIRING DIAGRAM

A01V0JYE05
*a from IG1 NO. 1 Relay
*b GAUGE
*c to Back-up Lights
*d Hybrid Vehicle Control ECU

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL SYSTEM)


    1. Check for DTCs Click here.

      OK
      Hybrid control system DTCs are not output.

    NG

    GO TO HYBRID CONTROL SYSTEM Click here

    OK

  2. INSPECT BACK UP LIGHT RELAY (BKUP LP RELAY)


    1. Inspect the back up light relay (BKUP LP relay) Click here.


    NG

    REPLACE BACK UP LIGHT RELAY (BKUP LP RELAY)

    OK

  3. CHECK HARNESS AND CONNECTOR (BACK UP LIGHT RELAY - IG1 NO. 1 RELAY AND BODY GROUND)


    1. A01UZKEE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 Back Up Light Relay (BKUP LP Relay) Holder

      Remove the back up light relay (BKUP LP relay) from the No. 2 engine room relay block.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3 - Body ground Ignition switch ON (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (BACK UP LIGHT RELAY - HYBRID VEHICLE CONTROL ECU)


    1. Remove the back up light relay (BKUP LP relay) from the No. 2 engine room relay block.

    2. Disconnect the A27 hybrid vehicle control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Relay terminal 1 - A27-2 (BL) Always Below 1 Ω
      Relay terminal 1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR