Lighting System Acc Signal Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM

INSPECT FUSE (ACC)

CHECK HARNESS AND CONNECTOR (ACC POWER SOURCE CIRCUIT)

LIGHTING SYSTEM - ACC Signal Circuit


DESCRIPTION

The main body ECU receives the ACC signal to control the illuminated entry system.

WIRING DIAGRAM


Corolla. Zre142 Aze141.Lighting (Int).Lighting System.Lighting System Acc Signal Circuit


INSPECTION PROCEDURE

1.READ VALUE 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 / Data List.

  1. Read the display on the Techstream.

    Main Body (Main Body ECU)
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    ACC SW
    		Ignition switch ACC signal/ON or OFF
    		ON: Ignition switch ACC
    OFF: Ignition switch off
    		-
    OK:
    Normal conditions listed above are displayed.


NG
Go to step 2
OK

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

2.INSPECT FUSE (ACC)

  1. Remove the ACC fuse from the instrument panel junction block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    ACC fuse
    		Always
    		Below 1 Ω


NG
REPLACE FUSE
OK


3.CHECK HARNESS AND CONNECTOR (ACC POWER SOURCE CIRCUIT)


    Corolla. Zre142 Aze141.Lighting (Int).Lighting System.Lighting System Acc Signal Circuit

  1. Measure the voltage between the loading slot of the fuse and body ground.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    ACC fuse terminal - Body ground
    		Ignition switch off
    		Below 1 V
    Ignition switch ACC
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)