Lighting System Interior Light Circuit

Vehicle Interior. Corolla. Zre142 Aze141
Lighting (Int). Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING TECHSTREAM

INSPECT FUSE (DOME)

CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK)

LIGHTING SYSTEM - Interior Light Circuit


DESCRIPTION

The main body ECU controls the personal light*1 and room light according to the door courtesy switch, door lock position switch, and ignition switch conditions.
HINT:
*1: w/ Sliding Roof

WIRING DIAGRAM


Corolla. Zre142 Aze141.Lighting (Int).Lighting System.Lighting System Interior Light Circuit


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST USING TECHSTREAM

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Main Body / Active Test.

  1. Check the operation.

    Main Body (Main Body ECU)
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Illuminated Entry System
    		Personal light*1 and room light (Personal switch OFF, Interior light switch is in DOOR position and all doors are closed)
    		ON/OFF
    		-
    HINT:
    *1: w/ Sliding Roof
    OK:
    Each light fades in.


NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (COROLLA_ZRE142 RM000002CE20DKX.html)

2.INSPECT FUSE (DOME)

  1. Remove the DOME fuse from the engine room relay block.

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

    Standard Resistance:
    Tester Display
    		Condition
    		Specified Condition
    DOME fuse
    		Always
    		Below 1 Ω


NG
REPLACE FUSE
OK


3.CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK)


    Corolla. Zre142 Aze141.Lighting (Int).Lighting System.Lighting System Interior Light Circuit

  1. Disconnect the 2K instrument panel junction block assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    2K-2 (ILE) - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)