Window Defogger System (For Automatic Air Conditioning System) Terminals Of Ecu

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

  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

  1. CHECK AIR CONDITIONING CONTROL ASSEMBLY

  1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

Window Defogger System (For Automatic Air Conditioning System) -- Terminals Of Ecu



CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Automatic Air Conditioning System) Terminals Of Ecu

  1. Disconnect the E30 air conditioning amplifier connector.

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

    Standard Voltage:

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E30-38 (RDFG) - E30-14 (GND)
    		B - W-B*1
    BE - W-B*2
    		Rear defogger signal
    		Ignition switch ON, Rear window defogger switch OFF
    		11 to 14 V
    E30-38 (RDFG) - E30-14 (GND)
    		B - W-B*1
    BE - W-B*2
    		Rear defogger signal
    		Ignition switch ON, Rear window defogger switch ON
    		Below 1 V
    E30-1 (IG+) - E30-14 (GND)
    		Y - W-B*1
    R - W-B*2
    		Power source (IG)
    		Ignition switch ON
    		11 to 14 V
    E30-1 (IG+) - E30-14 (GND)
    		Y - W-B*1
    R - W-B*2
    		Power source (IG)
    		Ignition switch off
    		Below 1 V
    E30-21 (B) - E30-14 (GND)
    		W - W-B*1
    BR - W-B*2
    		Power source (Back-up)
    		Always
    		11 to 14 V
    1. *1: for TMC Made
    2. *2: Except for TMC made
    If the result is not as specified, there may be a malfunction in the wire harness.

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

    Standard Resistance:

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E30-14 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction in the wire harness.

CHECK AIR CONDITIONING CONTROL ASSEMBLY


  1. Disconnect the E16 air conditioning control connector.


    Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Automatic Air Conditioning System) Terminals Of Ecu

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

    Standard Voltage:

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E16-5 (IG+) - E16-2 (GND)
    		B - W-B*1
    V - W-B*2
    		Power source (IG)
    		Ignition switch ON
    		11 to 14 V
    E16-5 (IG+) - E16-2 (GND)
    		B - W-B*1
    V - W-B*2
    		Power source (IG)
    		Ignition switch off
    		Below 1 V
    1. *1: for TMC Made
    2. *2: Except for TMC made
    If the result is not as specified, there may be a malfunction in the wire harness.

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

    Standard Resistance:

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E16-2 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction in the wire harness.

CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)


  1. Disconnect the 2G, 2F and 2Q instrument panel junction block connector.


    Corolla. Zre142 Aze141.Window Glass.Power Window Control System.Window Defogger System (For Automatic Air Conditioning System) Terminals Of Ecu

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

    Standard Voltage:

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    2G-1 - Body ground
    		W - Body ground
    		Power source
    		Always
    		11 to 14 V
    2Q-12 - Body ground
    		B - Body ground*1
    BE - Body ground*2
    		DEF relay operation signal
    		Ignition switch ON, Rear window defogger switch OFF
    		11 to 14 V
    2Q-12 - Body ground
    		B - Body ground*1
    BE - Body ground*2
    		DEF relay operation signal
    		Ignition switch ON, Rear window defogger switch ON
    		Below 1 V
    2F-2 - Body ground
    		B - Body ground
    		Defogger wire operation signal
    		Ignition switch ON, Rear window defogger switch OFF
    		Below 1 V
    2F-2 - Body ground
    		B - Body ground
    		Defogger wire operation signal
    		Ignition switch ON, Rear window defogger switch ON
    		11 to 14 V
    1. *1: for TMC Made
    2. *2: Except for TMC made
    If the result is not as specified, there may be a malfunction in the wire harness.