AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) TERMINALS OF ECU


  1. INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY, MAIN BODY ECU (NETWORK GATEWAY ECU)

    A004J5OE02

    1. Remove the main body ECU (network gateway ECU) from the instrument panel junction block assembly.

    2. Measure the values on the wire harness side with the connector disconnected.

      CONNECTOR MB

      Terminal No.

      (Symbol)

      		 Wiring Color Description Condition Specified Condition
      MB8(G) - Body ground - Power source (IG) Ignition switch : ON 11 to 14 V
      MB9(ACC) - Body ground - Power source (ACC) Ignition switch : ACC 11 to 14 V
      MB11(GND) - Body ground - Ground for main power supply Always Below 1 Ω

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

    3. Install the main body ECU (network gateway ECU) to the instrument panel junction block assembly.

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

      Tech Tips

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

      MAIN BODY ECU (NETWORK GATEWAY ECU) D5

      Terminal No.

      (Symbol)

      		 Wiring Color Description Condition Specified Condition
      D5- 13(CANL) - D5-14(CANH) LG - P CAN communication system CAN communication circuit Pulse generation
      MAIN BODY ECU (NETWORK GATEWAY ECU) D6

      Terminal No.

      (Symbol)

      		 Wiring Color Description Condition Specified Condition
      D6-17 - Body ground Y - Body ground A/C switch signal

      • Ignition switch : ON


      • A/C switch : ON

      		 Below 1 Ω

  2. ECM

    A004H0TE03

    Tech Tips

    Check from the rear of the connector while it is connected to the Air conditioning control assembly.

    Terminal No.

    (Symbol)

    		 Wiring Color Terminal Description Condition Specified Condition
    A33-8(ACP) - Body ground G - Body ground Air conditioning pressure switch signal

    Engine running

    A/C system operating

    Refrigerant pressure: Abnormal

    		 Below 1 V

    Engine running

    A/C system operating

    Refrigerant pressure: Normal

    		 11 to 14 V
    A33- 18(CANL) - A33-19(CANH) B-P - O CAN communication system CAN communication circuit Pulse generation