SEAT HEATER SYSTEM TERMINALS OF ECU


  1. CHECK SEAT CLIMATE CONTROL ECU LH

    A001FZTE02

    1. Disconnect the f13 ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f13-1 (IG) - Body ground Y - Body ground Power source Engine switch on (IG) 11 to 14 V
      f13-2 (SYSB) - Body ground V - Body ground Power source Always 11 to 14 V
      f13-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      f13-13 (LIN) - Body ground V - Body ground LIN line Always 10 kΩ or higher

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

    3. Reconnect the f13 connector.

    4. Measure the voltage of the connectors.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f46-1 (AMP) - Body ground L - Body ground Power supply for seat heater

      Engine switch on (IG)

      Seat heater switch OFF

      		 Below 1 V

      Engine switch on (IG)

      Turn seat heater switch Max. WARM

      		 11 to 14 V
      f46-6 (H5) - Body ground BR - Body ground Seat heater temp. signal Engine switch off Below 1 V
      Engine switch on (IG) 1 to 4 V
      f46-7 (HS) - Body ground P - Body ground Seat heater temp. signal ground Always Below 1 V

      • If the result is not as specified, the ECU may have a malfunction.

  2. CHECK SEAT CLIMATE CONTROL ECU RH

    A001AG6E02

    1. Disconnect the f8 ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f8-1 (IG) - Body ground Y - Body ground Power source Engine switch on (IG) 11 to 14 V
      f8-2 (SYSB) - Body ground G - Body ground Power source Always 11 to 14 V
      f8-11 (VER) - Body ground W-B - Body ground Ground Always Below 1 Ω
      f8-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      f8-13 (LIN) - Body ground V - Body ground LIN line Always 10 kΩ or higher

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

    3. Reconnect the f8 ECU connector.

    4. Measure the voltage of the connectors.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f45-1 (AMP) - Body ground L - Body ground Power supply for seat heater

      Engine switch on (IG)

      Seat heater switch OFF

      		 Below 1 V

      Engine switch on (IG)

      Turn seat heater switch Max. WARM

      		 11 to 14 V
      f45-6 (H5) - Body ground BR - Body ground Seat heater temp. signal Engine switch off Below 1 V
      Engine switch on (IG) 1 to 4 V
      f45-7 (HS) - Body ground P - Body ground Seat heater temp. signal ground Always Below 1 V

      • If the result is not as specified, the ECU may have a malfunction.