CLIMATE CONTROL SEAT SYSTEM TERMINALS OF ECU


  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    B006MIKN11

    1. Disconnect the G36 air conditioning amplifier assembly 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
      G36-1 (IG+) - Body ground V - Body ground Power source (IG) Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      G36-14 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω

    3. Reconnect the G36 air conditioning amplifier assembly connector.

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

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      G38-8 (SG-3) - G38-9 (S5-2) BE - SB Power source for sensor

      • Engine switch on (IG)

      • Refreshing seat switch (for LH) off

      • Refreshing seat switch (for RH) off

      		 Below 1 V

      • Engine switch on (IG)

      • Refreshing seat switch (for LH) on and set to seat blower position

      • Refreshing seat switch (for RH) on and set to seat blower position

      		 4.5 to 5.5 V
      G38-18 (SVDS) - Body ground LG - Body ground Switch volume signal

      • Engine switch on (IG)

      • Refreshing seat switch (for RH) off

      		 0 V

      • Engine switch on (IG)

      • Refreshing seat switch (for RH) on and set to seat blower position

      		 5 V
      G38-19 (SVPS) - Body ground BR - Body ground Switch volume signal

      • Engine switch on (IG)

      • Refreshing seat switch (for LH) off

      		 0 V

      • Engine switch on (IG)

      • Refreshing seat switch (for LH) on and set to seat blower position

      		 5 V
      G38-10 (ROUT) - Body ground G - Body ground Climate control blower control signal

      • Engine switch on (IG)

      • Refreshing seat switch (for RH) on and set to seat blower position

      Pulse generation

      (See waveform)
      G38-11 (LOUT) - Body ground P - Body ground Climate control blower control signal

      • Engine switch on (IG)

      • Refreshing seat switch (for LH) on and set to seat blower position

      Pulse generation

      (See waveform)
      G36-35 (SG-5) - Body ground V - Body ground Ground for sensor Always Below 1 Ω
    5. B006P3K

      Waveform:

      Item Content
      Terminal No.

      G38-10 (ROUT) - Body ground

      G38-11 (LOUT) - Body ground
      Tool Setting 1 V/DIV., 1 ms/DIV.
      Vehicle Condition

      • Engine switch on (IG)

      • Refreshing seat switch (for RH) on and set to seat blower position

      • Refreshing seat switch (for LH) on and set to seat blower position

  2. REAR SEAT CLIMATE CONTROL ECU LH (w/ Rear Climate Control Seat)

    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
      Y24-12 (IG) - Body ground B - Body ground IG power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      Y24-13 (+B) - Body ground P - Body ground Battery power supply Always 11 to 14 V
      Y24-3 (GND) - Body ground W - Body ground Ground Always Below 1 Ω

    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 pulses according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      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
      Y24-18 (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 blower position

      		 0 to 2.49 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
      Y24-24 (HSWI) - Body ground R - Body ground Seat blower indicator signal

      • Engine switch on (IG)

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

      		 Pulse generation
      Y24-26 (BLWM) - Body ground GR - Body ground Climate control blower control signal

      • Engine switch on (IG)

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

      		 Pulse generation

  3. REAR SEAT CLIMATE CONTROL ECU RH (w/ Rear Climate Control Seat)

    B006P8RE04

    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
      Y4-12 (IG) - Body ground B - Body ground IG power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      Y4-13 (+B) - Body ground P - Body ground Battery power supply Always 11 to 14 V
      Y4-3 (GND) - Body ground W - Body ground Ground Always Below 1 Ω

    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 pulses according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      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
      Y4-18 (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 blower position

      		 0 to 2.49 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
      Y4-24 (HSWI) - Body ground R - Body ground Seat blower indicator signal

      • Engine switch on (IG)

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

      		 Pulse generation
      Y4-26 (BLWM) - Body ground GR - Body ground Climate control blower control signal

      • Engine switch on (IG)

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

      		 Pulse generation