WINDOW DEFOGGER SYSTEM > TERMINALS OF ECU

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CHECK ECM (3GR-FE, 3GR-FSE)

B078135E02

  1. Measure the voltage and resistance of each terminal of the connectors.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    +BM (E8-5) - E1 (E7-7)
    		P - BR
    		Power supply
    		Engine switch on (IG)
    		10 to 14 V
    BATT (A6-4) - E1 (E7-7)
    		L - BR
    		Power supply
    		Always
    		10 to 14 V
    +B1 (A6-5) - E1 (E7-7)
    		B-R - BR
    		Power supply
    		Engine switch on (IG)
    		10 to 14 V
    +B (A6-6) - E1 (E7-7)
    		B-R - BR
    		Power supply
    		Engine switch on (IG)
    		10 to 14 V
    IGSW (A6-17) - E1 (E7-7)
    		B-W - BR
    		Ignition power supply
    		Engine switch on (IG)
    		Below 1 V
    IGSW (A6-17) - E1 (E7-7)
    		B-W - BR
    		Ignition power supply
    		Engine switch off
    		10 to 14 V
    RDEF (A7-13) - E1 (E7-7)
    		G-B - BR
    		DEFOG relay
    		Engine switch on (IG)
    Rear defogger switch ON
    		Below 1 V
    RDEF (A7-13) - E1 (E7-7)
    		G-B - BR
    		DEFOG relay
    		Engine switch on (IG)
    Rear defogger switch OFF
    		10 to 14 V
    ME01 (E8-4) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E1 (E7-7) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E02 (E6-1) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E01 (E6-2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    EC (A6-2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, the ECM may have a malfunction.


CHECK ECM (3UZ-FE)

A053766E07

  1. Measure the voltage and resistance of each terminal of the connectors.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    +BM (E8-5) - E1 (E7-7)
    		P - BR
    		Power supply
    		Engine switch on (IG)
    		10 to 14 V
    BATT (A6-4) - E1 (E7-7)
    		L - BR
    		Power supply
    		Always
    		10 to 14 V
    +B1 (A6-5) - E1 (E7-7)
    		B-R - BR
    		Power supply
    		Engine switch on (IG)
    		10 to 14 V
    +B (A6-6) - E1 (E7-7)
    		B-R - BR
    		Power supply
    		Engine switch on (IG)
    		10 to 14 V
    IGSW (A6-17) - E1 (E7-7)
    		B-W - BR
    		Ignition power supply
    		Engine switch on (IG)
    		Below 1 V
    IGSW (A6-17) - E1 (E7-7)
    		B-W - BR
    		Ignition power supply
    		Engine switch off
    		10 to 14 V
    RDEF (A7-13) - E1 (E7-7)
    		G-B - BR
    		DEFOG relay
    		Engine switch on (IG)
    Rear defogger switch ON
    		Below 1 V
    RDEF (A7-13) - E1 (E7-7)
    		G-B - BR
    		DEFOG relay
    		Engine switch on (IG)
    Rear defogger switch OFF
    		10 to 14 V
    ME01 (E8-4) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E1 (E7-7) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E02 (E6-1) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E01 (E6-2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    EC (A6-2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, the ECM may have a malfunction.


CHECK A/C AMPLIFIER ASSEMBLY (A/C ECU)

B106800E01

  1. Disconnect the L52 amplifier connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IG+ (L52-21) - GND (L52-20)
    		W - W-B
    		Ignition power supply
    		Engine switch on (IG)
    		10 to 14 V
    IG+ (L52-21) - GND (L52-20)
    		W - W-B
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    B (L52-1) - GND (L52-20)
    		L - W-B
    		Battery power supply
    		Always
    		10 to 14 V
    GND (L52-20) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction on the wire harness side.


CHECK MULTI-DISPLAY

B106749E06

  1. Disconnect the L46 multi-display connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IG (L46-3) - GND1 (L46-10)
    		B - W-B
    		Ignition power supply
    		Engine switch on (IG)
    		10 to 14 V
    IG (L46-3) - GND1 (L46-10)
    		B - W-B
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    +B (L46-1) - GND1 (L46-10)
    		O - W-B
    		Battery power supply
    		Always
    		10 to 14 V
    GND1 (L46-10) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction on the wire harness side.


CHECK POWER SOURCE CONTROL ECU

B106766E03

  1. Disconnect the L73 ECU connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    AM1 (L73-33) - Body ground
    		O - Body ground
    		+B power supply
    		Always
    		10 to 14 V
    GND2 (L73-6) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the L73 ECU connector.

  4. Measure the voltage of the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IG1D (L73-34) - GND2 (L73-6)
    		SB - W-B
    		IG1 control signal
    		Engine switch on (ACC)
    		Below 1 V
    IG1D (L73-34) - GND2 (L73-6)
    		SB - W-B
    		IG1 control signal
    		Engine switch off)
    		10 to 14 V
    If the result is not as specified, the ECU may have a malfunction.