LIGHTING SYSTEM > Back-up Light Circuit

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DESCRIPTION

The back-up light turns on by receiving the park / neutral position switch signal (shift position R signal) from the luggage room junction block ECU.

WIRING DIAGRAM


E109556E02


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the back-up light illuminates.

    Multiplex network rear ECU:

    Item
    		Test Details
    		Diagnostic Note
    Backup light
    		Back-up light ON / OFF
    		-

    OK:
    Back-up light illuminates.



OK
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2.READ VALUE OF INTELLIGENT TESTER

  1. Check the Data List for proper functioning of the park / neutral position switch.

    AFS ECU:

    Item
    		Measurement Item / Display (Range)
    		Normal Condition
    		Diagnostic Note
    Shift Pos-R
    		Transmission position R signal / ON or OFF
    		ON: Shift position is R
    OFF: Shift position is not R
    		-



OK
Go to step 3
NG

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

3.REPLACE BACK-UP LIGHT BULB

  1. Temporarily replace the back-up light bulb with a new or normally functioning one.

  1. Check that light bulb illuminates.

    OK:
    Back-up light bulb illuminates.



OK
END
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4.CHECK WIRE HARNESS (NO. 1 JUNCTION BLOCK - REAR COMBINATION LIGHT (BACK-UP LH OR BACK-UP RH) - BODY GROUND)


    E108515E19

  1. Check the wire harness between the rear combination light (back-up LH) and No. 1 junction block, and the rear combination light (back-up LH) and body ground.

    1. Disconnect the a2 light connector.

    2. Disconnect the LA junction block connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance:
      Tester Connection
      		Specified Condition
      LA-2 (BCK1) - a2-1 (B)
      		Below 1 Ω
      LA-2 (BCK1) or a2-1 (B) - Body ground
      		10 kΩ or higher

    4. Connect the LA junction block connector.

    5. Measure the resistance of the wire harness side connector.

      Standard resistance:
      Tester Connection
      		Specified Condition
      a2-4 (E) - Body ground
      		Below 1 Ω



    E108515E20

  1. Check the wire harness between the rear combination light (back-up RH) and No. 1 junction block, and the rear combination light (back-up RH) and body ground.

    1. Disconnect the a9 light connector.

    2. Disconnect the LA junction block connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance:
      Tester Connection
      		Specified Condition
      LA-2 (BCK1) - a9-1 (B)
      		Below 1 Ω
      LA-2 (BCK1) or a9-1 (B) - Body ground
      		10 kΩ or higher

    4. Connect the LA junction block connector.

    5. Measure the resistance of the wire harness side connector.

      Standard resistance:
      Tester Connection
      		Specified Condition
      a9-4 (E) - Body ground
      		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE