WINDOW DEFOGGER SYSTEM > TERMINALS OF ECU

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CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


  1. Disconnect the H85 air conditioning amplifier assembly connector.


    E124486E68

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

    HINT:
    Measure the values on the wire harness side with the connector disconnected.


    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    H85-1 (IG+) - H85-14 (GND)
    		B - W-B
    		Power source (IG)
    		Power switch on (IG)
    		11 to 14 V
    H85-1 (IG+) - H85-14 (GND)
    		B - W-B
    		Power source (IG)
    		Power switch off
    		Below 1 V
    H85-21 (B) - H85-14 (GND)
    		Y - W-B
    		Auxiliary battery power supply
    		Power switch off
    		11 to 14 V
    H85-14 (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.

  3. Reconnect the H85 air conditioning amplifier assembly connector.

  4. Measure the voltage and check for pulses according to the value(s) in the table below.

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    H85-20 (SW7) - H85-14 (GND)
    		Y - W-B
    		Rear window defogger signal
    		Power switch on (IG), rear window defogger switch off
    		11 to 14 V
    H85-20 (SW7) - H85-14 (GND)
    		Y - W-B
    		Rear window defogger signal
    		Power switch on (IG), rear window defogger switch on
    		Below 1 V
    H85-37 (LIN1) - H85-14 (GND)
    		V - W-B
    		LIN communication line
    		Power switch on (IG)
    		Pulse generation
    If the result is not as specified, the air conditioning amplifier assembly may have a malfunction.


CHECK AIR CONDITIONING CONTROL PANEL (CENTER CLUSTER MODULE CIRCUIT)


  1. Disconnect the H80 air conditioning control panel (center cluster module circuit) connector.


    B270939E01

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

    HINT:
    Measure the values on the wire harness side with the connector disconnected.


    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    H80-2 (IG+) - H80-16 (GND)
    		B - W-B
    		Power source (IG)
    		Power switch on (IG)
    		11 to 14 V
    H80-2 (IG+) - H80-16 (GND)
    		B - W-B
    		Power source (IG)
    		Power switch off
    		Below 1 V
    H80-4 (+B) - H80-16 (GND)
    		R - W-B
    		Auxiliary battery power supply
    		Power switch off
    		11 to 14 V
    H80-16 (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.

  3. Reconnect the H80 air conditioning control panel (center cluster module circuit) connector.

  4. Check for pulses according to the value(s) in the table below.

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    H80-11 (LIN1) - H80-16 (GND)
    		V - W-B
    		LIN communication line
    		Power switch on (IG)
    		Pulse generation
    If the result is not as specified, the air conditioning control panel (center cluster module circuit) may have a malfunction.