WINDOW DEFOGGER SYSTEM > TERMINALS OF ECU

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CHECK AIR CONDITIONING AMPLIFIER (for Automatic Air Conditioning System)

E127561E07

  1. Disconnect the D15 air conditioning amplifier connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D15-1 (IG+) - D15-14 (GND)
    		Y - W-B
    		Ignition power supply
    		Ignition switch ON
    		11 to 14 V
    Ignition switch off
    		Below 1 V
    D15-14 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    D15-21 (B) - D15-14 (GND)
    		V - W-B
    		Battery power source
    		Always
    		11 to 14 V

    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the air conditioning amplifier connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D15-37 (LIN1) - D15-14 (GND)
    		L - W-B
    		LIN communication signal
    		Ignition switch ON
    		Pulse generation
    D15-38 (RDEF) - D15-14 (GND)
    		GR - W-B
    		Defogger relay
    		Ignition switch ON
    Defogger switch OFF
    		11 to 14 V
    Ignition switch ON
    Back door window closed
    Defogger switch ON
    		Below 1 V

    1. If the result is not as specified, the air conditioning amplifier may have a malfunction.


CHECK INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY (for Auto Air Conditioning System)

B210243E01

  1. Disconnect the D5 instrument cluster finish panel assembly connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D5-5 (IG+) - D5-4 (GND)
    		P - W-B
    		Ignition power supply
    		Ignition switch off
    		Below 1 V
    Ignition switch ON
    		11 to 14 V
    D5-4 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω

    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the instrument cluster finish panel assembly connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D5-3 (LIN1) - D5-4 (GND)
    		L - W-B
    		LIN communication circuit
    		Ignition switch ON
    		Pulse generation

    1. If the result is not as specified, the instrument cluster finish panel assembly may have a malfunction.


CHECK NO. 3 HEATER CONTROL (except Auto Air Conditioning System)

B210244E01

  1. Disconnect the D8 No. 3 heater control connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D8-1 (E) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    D8-3 (IG+) - D8-1 (E)
    		R - W-B
    		Power source
    		Ignition switch ON
    		11 to 14 V
    Ignition switch off
    		Below 1 V

    1. If the result is not as specified, there may be a malfunction in the wire harness side.

  3. Reconnect the No. 3 heater control connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D8-2 (RDEF) - D8-1 (E)
    		V - W-B
    		Rear defogger signal
    		Ignition switch ON, defogger switch OFF
    		11 to 14 V
    Ignition switch ON, defogger switch ON
    		Below 1 V

    1. If the result is not as specified, the air conditioning control assembly may have a malfunction.