Lighting System Door Courtesy Switch Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM

INSPECT DOOR COURTESY SWITCH

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

LIGHTING SYSTEM - Door Courtesy Switch Circuit


DESCRIPTION

The main body ECU detects the condition of the door courtesy switches.

WIRING DIAGRAM


Corolla. Zre142 Aze141.Lighting (Int).Lighting System.Lighting System Door Courtesy Switch 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
    D Door Courtesy SW
    		Driver side door courtesy switch signal/ON or OFF
    		ON: Driver side door is open
    OFF: Driver side door is closed
    		-
    P Door Courtesy SW
    		Front passenger side door courtesy switch signal/ON or OFF
    		ON: Front passenger side door is open
    OFF: Front passenger side door is closed
    		-
    RR Door Courtesy SW
    		Rear door courtesy switch RH signal/ON or OFF
    		ON: Rear door RH is open
    OFF: Rear door RH is closed
    		-
    RL Door Courtesy SW
    		Rear door courtesy switch LH signal/ON or OFF
    		ON: Rear door LH is open
    OFF: Rear door LH is closed
    		-
    Luggage Courtesy SW
    		Luggage compartment door courtesy switch signal/ON or OFF
    		ON: Luggage compartment door is open
    OFF: Luggage compartment door is closed
    		-
    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 DOOR COURTESY SWITCH

  1. Inspect the front door courtesy switch (COROLLA_ZRE142 RM0000017MQ020X.html), rear door courtesy switch (COROLLA_ZRE142 RM0000017MO020X.html), or luggage compartment door courtesy switch (COROLLA_ZRE142 RM00000202P03YX.html).

    OK:
    Door courtesy switches are normal.


NG
REPLACE DOOR COURTESY SWITCH
OK


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


  1. Disconnect the E50*1 or E61*2 main body ECU connector.


    Corolla. Zre142 Aze141.Lighting (Int).Lighting System.Lighting System Door Courtesy Switch Circuit

  1. Disconnect the 2A and 2E instrument panel junction block connectors.

  1. Disconnect the L18 door lock assembly connector.

  1. Disconnect each door courtesy switch connector.

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

    Standard Resistance:
    Front LH:
    Tester Connection
    		Condition
    		Specified Condition
    2A-21 (DCTY) - L3-1
    		Always
    		Below 1 Ω
    L3-1 - Body ground
    		Always
    		10 kΩ or higher
    Front RH:
    Tester Connection
    		Condition
    		Specified Condition
    2E-20 (PCTY) - M1-1
    		Always
    		Below 1 Ω
    M1-1 - Body ground
    		Always
    		10 kΩ or higher
    Rear LH:
    Tester Connection
    		Condition
    		Specified Condition
    E50-8 (LCTY)*1 - L5-1
    E61-13 (LCTY)*2 - L5-1
    		Always
    		Below 1 Ω
    L5-1 - Body ground
    		Always
    		10 kΩ or higher
    Rear RH:
    Tester Connection
    		Condition
    		Specified Condition
    2E-19 (RCTY) - M3-1
    		Always
    		Below 1 Ω
    M3-1 - Body ground
    		Always
    		10 kΩ or higher
    Luggage Compartment Door:
    Tester Connection
    		Condition
    		Specified Condition
    2A-7 (LGCY) - L18-3
    		Always
    		Below 1 Ω
    L18-3 - Body ground
    		Always
    		10 kΩ or higher
    L18-2 - Body ground
    		Always
    		Below 1 Ω
    HINT:
    1. *1: w/ Smart Key System
    2. *2: w/o Smart Key System


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)