SEAT HEATER SYSTEM TERMINALS OF ECU


  1. CHECK SEAT CLIMATE CONTROL ECU LH

    A01GZO1E15

    1. Disconnect the f13 ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f13-1 (IG) - Body ground Y - Body ground Power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      f13-2 (SYSB) - Body ground G - 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 ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f48-1 (AMP) - Body ground L - Body ground Power supply for seat heater

      Power switch on (IG)

      Seat heater switch OFF

      		 Below 1 V

      Power switch on (IG)

      Seat heater switch Max. WARM

      		 11 to 14 V
      f48-6 (H5) - Body ground BR - Body ground Seat heater temp. signal Power switch off Below 1 V
      Power switch on (IG) 1 to 4 V
      f48-7 (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

    A01GZO1E16

    1. Disconnect the f8 ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f8-1 (IG) - Body ground Y - Body ground Power source Power switch off Below 1 V
      Power 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 and resistance according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f47-1 (AMP) - Body ground L - Body ground Power supply for seat heater

      Power switch on (IG)

      Seat heater switch OFF

      		 Below 1 V

      Power switch on (IG)

      Seat heater switch Max. WARM

      		 11 to 14 V
      f47-6 (H5) - Body ground BR - Body ground Seat heater temp. signal Power switch off Below 1 V
      Power switch on (IG) 1 to 4 V
      f47-7 (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.