Window Defogger System (For Manual Air Conditioning System) Rear Window Defogger System Does Not Operate

Vehicle Exterior. Corolla. Zre142 Aze141
Window Glass. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK REAR WINDOW DEFOGGER SYSTEM

CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE - INSTRUMENT PANEL JUNCTION BLOCK)

CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE - BATTERY)

CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE - BODY GROUND)

INSPECT FUSES (DEF, ECU-IG NO. 2, HTR-IG)

CHECK HARNESS AND CONNECTOR (IG1 RELAY POWER SOURCE)

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

CHECK HARNESS AND CONNECTOR (HEATER CONTROL (BLOWER SWITCH) - INSTRUMENT PANEL J/B)

CHECK HARNESS AND CONNECTOR (HEATER CONTROL (BLOWER SWITCH) - BATTERY)

CHECK HARNESS AND CONNECTOR (HEATER CONTROL (BLOWER SWITCH) - BODY GROUND)

WINDOW DEFOGGER SYSTEM (for Manual Air Conditioning System) - Rear Window Defogger System does not Operate


DESCRIPTION

When the rear window defogger switch, which is built into the heater control (blower switch), is operated, the operation signals are transmitted to the DEF relay (coil side). When the DEF relay (coil side) receives the signals, it turns on the DEF relay (switch side) to operate the rear window defogger.

WIRING DIAGRAM


Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Manual Air Conditioning System) Rear Window Defogger System Does Not Operate


INSPECTION PROCEDURE

1.CHECK REAR WINDOW DEFOGGER SYSTEM

  1. Turn the window defogger switch on.

  1. Check that operation sound of the DEF relay is heard.

    OK:
    Relay operating sound is heard


NG
Go to step 5
OK


2.CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE - INSTRUMENT PANEL JUNCTION BLOCK)


    Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Manual Air Conditioning System) Rear Window Defogger System Does Not Operate

  1. Disconnect the 2F instrument panel junction block and L46 rear window defogger wire connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L46-1 - 2F-2
    		Always
    		Below 1 Ω
    L46-1 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE - BATTERY)


    Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Manual Air Conditioning System) Rear Window Defogger System Does Not Operate

  1. Reconnect the 2F instrument panel junction block connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    L46-1 - Body ground
    		Ignition switch ON, Rear window defogger switch ON
    		11 to 14 V


NG
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (COROLLA_ZRE142 RM000000U8S09CX.html)
OK


4.CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE - BODY GROUND)


    Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Manual Air Conditioning System) Rear Window Defogger System Does Not Operate

  1. Disconnect the P1 rear window defogger wire connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P1-1 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPAIR OR REPLACE REAR WINDOW DEFOGGER WIRE (COROLLA_ZRE142 RM000000WYG05ZX.html)

5.INSPECT FUSES (DEF, ECU-IG NO. 2, HTR-IG)

  1. Remove the DEF, ECU-IG No. 2 and HTR-IG fuses from the instrument panel junction block.

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

    Standard Resistance:
    Item
    		Condition
    		Specified Condition
    DEF fuse
    		Always
    		Below 1 Ω
    ECU-IG No. 2 fuse
    		Always
    		Below 1 Ω
    HTR-IG fuse
    		Always
    		Below 1 Ω


NG
REPLACE FUSES
OK


6.CHECK HARNESS AND CONNECTOR (IG1 RELAY POWER SOURCE)


    Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Manual Air Conditioning System) Rear Window Defogger System Does Not Operate

  1. Disconnect the 2F instrument panel junction block connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    2F-3 - Body Ground
    		Ignition switch ON
    		11 to 14 V
    Result:
    Result
    		Proceed to
    OK
    		A
    NG (w/ Smart Key System)
    		B
    NG (w/o Smart Key System)
    		C


B
GO TO SMART KEY SYSTEM (COROLLA_ZRE142 RM000000YEF0FXX.html)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A


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


    Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Manual Air Conditioning System) Rear Window Defogger System Does Not Operate

  1. Disconnect the 2G instrument panel junction block connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    2G-1 - Body ground
    		Ignition switch ON
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.CHECK HARNESS AND CONNECTOR (HEATER CONTROL (BLOWER SWITCH) - INSTRUMENT PANEL J/B)


    Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Manual Air Conditioning System) Rear Window Defogger System Does Not Operate

  1. Disconnect the E70 heater control (blower switch) and 2Q instrument panel junction block connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E70-2 (RDEF) - 2Q-12
    		Always
    		Below 1 Ω
    E70-3 (IG+) - 2Q-10
    		Always
    		Below 1 Ω
    E70-2 (RDEF) - Body ground
    		Always
    		10 kΩ or higher
    E70-3 (IG+) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


9.CHECK HARNESS AND CONNECTOR (HEATER CONTROL (BLOWER SWITCH) - BATTERY)


    Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Manual Air Conditioning System) Rear Window Defogger System Does Not Operate

  1. Reconnect the 2Q instrument panel junction block connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E70-2 (RDEF) - Body ground
    		Ignition switch ON
    		11 to 14 V
    E70-3 (IG+) - Body ground
    		Ignition switch ON
    		11 to 14 V


NG
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (COROLLA_ZRE142 RM000000U8S09CX.html)
OK


10.CHECK HARNESS AND CONNECTOR (HEATER CONTROL (BLOWER SWITCH) - BODY GROUND)


    Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Manual Air Conditioning System) Rear Window Defogger System Does Not Operate

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E70-5 (E) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE HEATER CONTROL (BLOWER SWITCH) (COROLLA_ZRE142 RM000002XM202HX.html)