SEAT HEATER SYSTEM TERMINALS OF ECU


  1. CHECK SEAT CLIMATE CONTROL ECU LH (w/ Climate Control Seat System)

    A01EQ1IE07

    1. Disconnect the c56 seat climate control ECU LH 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
      c56-12 (B) - Body ground G - Body ground Battery power supply Always 11 to 14 V
      c56-13 (IG) - Body ground G - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      c56-8 (H5) - c56-19 (HS) LG - BE Front seat cushion heater LH (temperature sensor) signal 25°C 10 kΩ
      c56-15 (V5) - c56-6 (VS) B - G Front seat heater switch LH signal Front seat heater switch LH max hot Below 100 Ω
      c56-15 (V5) - c56-17 (VG) B - BR Front seat heater switch LH signal Always 4 to 6 kΩ
      c56-3 (GND) -Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the c56 seat climate control ECU LH connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      c56-11 (B) - c56-2 (E) W - B Front seat heater LH drive signal Engine switch on (IG), front seat heater LH operating 11 to 14 V
      Engine switch on (IG), front seat heater LH not operating Below 1 V
      c56-15 (V5) - Body ground B - Body ground Front seat heater switch LH power supply Engine switch on (IG) 4.7 to 5.2 V
      c56-26 (IND) - Body ground L - Body ground Seat heater switch indicator light illumination signal Engine switch on (IG), front seat heater LH operating (seat heater switch indicator light illuminated) Below 1 V
      Engine switch on (IG), front seat heater LH not operating (seat heater switch indicator light not illuminated) 11 to 14 V

  2. CHECK SEAT CLIMATE CONTROL ECU RH (w/ Climate Control Seat System)

    A01EQ1IE08

    1. Disconnect the c55 seat climate control ECU RH 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
      c55-12 (B) - Body ground G - Body ground Battery power supply Always 11 to 14 V
      c55-13 (IG) - Body ground G - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      c55-8 (H5) - c55-19 (HS) LG - BE Front seat cushion heater RH (temperature sensor) signal 25°C 10 kΩ
      c55-15 (V5) - c55-6 (VS) B - W Front seat heater switch RH signal Front seat heater switch RH max hot Below 100 Ω
      c55-15 (V5) - c55-17 (VG) B - BR Front seat heater switch RH signal Always 4 to 6 kΩ
      c55-3 (GND) -Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the c55 seat climate control ECU RH connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      c55-11 (B) - c55-2 (E) W - B Front seat heater RH drive signal Engine switch on (IG), front seat heater RH operating 11 to 14 V
      Engine switch on (IG), front seat heater RH not operating Below 1 V
      c55-15 (V5) - Body ground B - Body ground Front seat heater switch RH power supply Engine switch on (IG) 4.7 to 5.2 V
      c55-26 (IND) - Body ground R - Body ground Seat heater switch indicator light illumination signal Engine switch on (IG), front seat heater RH operating (seat heater switch indicator light illuminated) Below 1 V
      Engine switch on (IG), front seat heater RH not operating (seat heater switch indicator light not illuminated) 11 to 14 V