SEAT HEATER SYSTEM TERMINALS OF ECU


  1. REAR SEAT CLIMATE CONTROL ECU LH

    B006P8RE05

    1. Disconnect the Y24 rear seat climate control ECU LH connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      Y24-3 (GND) - Body ground W - Body ground Ground Always Below 1 Ω
      Y24-12 (IG) - Body ground B - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      Y24-13 (+B) - Body ground P - Body ground Battery power supply Always 11 to 14 V

    3. Reconnect the Y24 rear seat climate control ECU LH connector.

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

    5. Check for pulse generation according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      Y24-1 (IND1) - Body ground LG - Body ground Seat heater indicator signal

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on and set to seat heater position

      		 Pulse generation
      Y24-7 (HSWM) - Body ground L - Body ground Heated and ventilated seat main switch signal

      • Engine switch on (IG)

      • Heated and ventilated seat main switch off

      		 11 to 14 V

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on

      		 Below 1 V
      Y24-11 (HTR+) - Y24-2 (HTR-) Y - L Seat heater drive signal

      • Engine switch on (IG)

      • Heated and ventilated seat main switch off

      		 Below 1 V

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on and set to seat heater position

      		 11 to 14 V
      Y24-18 (HSWS) - Body ground G - Body ground Heated and ventilated seat main switch volume signal

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on and set to seat heater position

      		 2.5 to 5 V
      Y24-19 (HSW5) - Y24-20 (HSWG) V - B Heated and ventilated seat main switch output

      • Engine switch on (IG)

      • Heated and ventilated seat main switch off

      		 Below 1 V

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on

      		 4.5 to 5.5 V

  2. REAR SEAT CLIMATE CONTROL ECU RH

    B006P8RE06

    1. Disconnect the Y4 rear seat climate control ECU RH connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      Y4-3 (GND) - Body ground W - Body ground Ground Always Below 1 Ω
      Y4-12 (IG) - Body ground B - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      Y4-13 (+B) - Body ground P - Body ground Battery power supply Always 11 to 14 V

    3. Reconnect the Y4 rear seat climate control ECU RH connector.

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

    5. Check for pulse generation according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      Y4-1 (IND1) - Body ground LG - Body ground Seat heater indicator signal

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on and set to seat heater position

      		 Pulse generation
      Y4-7 (HSWM) - Body ground L - Body ground Heated and ventilated seat main switch signal

      • Engine switch on (IG)

      • Heated and ventilated seat main switch off

      		 11 to 14 V

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on

      		 Below 1 V
      Y4-11 (HTR+) - Y4-2 (HTR-) Y - L Seat heater drive signal

      • Engine switch on (IG)

      • Heated and ventilated seat main switch off

      		 Below 1 V

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on and set to seat heater position

      		 11 to 14 V
      Y4-18 (HSWS) - Body ground G - Body ground Heated and ventilated seat main switch volume signal

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on and set to seat heater position

      		 2.5 to 5 V
      Y4-19 (HSW5) - Y4-20 (HSWG) V - B Heated and ventilated seat main switch output

      • Engine switch on (IG)

      • Heated and ventilated seat main switch off

      		 Below 1 V

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on

      		 4.5 to 5.5 V