CLIMATE CONTROL SEAT SYSTEM TERMINALS OF ECU


  1. CHECK SEAT CLIMATE CONTROL ECU LH

    A01EQ1IE09

    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
      c56-15 (V5) - c56-6 (VS) B - G Front seat heater switch LH signal Front seat heater switch LH (blower on HI) 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
      c56-15 (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 LH blower fan operating (seat heater switch indicator light illuminated) Below 1 V
      Engine switch on (IG), front LH blower fan not operating (seat heater switch indicator light not illuminated) 11 to 14 V
      c56-24 (BCS) - c56-1 (BFC-) L - B Front climate control blower LH drive signal Engine switch on (IG), front seat heater switch LH off Below 1 V
      Engine switch on (IG), front seat heater switch LH on (blower on HI) 12.6 to 13.4 V

  2. CHECK SEAT CLIMATE CONTROL ECU RH

    A01EQ1IE10

    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
      c55-15 (V5) - c55-6 (VS) B - W Front seat heater switch RH signal Front seat heater switch RH (blower on HI) 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
      c55-15 (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 RH blower fan operating (seat heater switch indicator light illuminated) Below 1 V
      Engine switch on (IG), front RH blower fan not operating (seat heater switch indicator light not illuminated) 11 to 14 V
      c55-24 (BCS) - c55-1 (BFC-) L - B Front climate control blower RH drive signal Engine switch on (IG), front seat heater switch RH off Below 1 V
      Engine switch on (IG), front seat heater switch RH on (blower on HI) 12.6 to 13.4 V