SEAT HEATER SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    B002KYUN03

    1. Disconnect the I50 air conditioning amplifier assembly 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
      I50-1 (IG+) - Body ground SB - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      I50-14 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I50-21 (B) - Body ground GR - Body ground Battery power supply Power switch off 11 to 14 V

    3. Reconnect the I50 air conditioning amplifier assembly connector.

    4. Measure the voltage and resistance 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
      I50-16 (SHP+) - Body ground V - Body ground Seat heater (for Front Passenger Side) drive signal

      • Power switch on (IG)

      • Seat heater switch (for Front Passenger Side) on

      		 Below 1 V
      I50-17 (SHD+) - Body ground LG - Body ground Seat heater (for Driver Side) input signal

      • Power switch on (IG)

      • Seat heater switch (for Driver Side) on

      		 Below 1 V
      I50-37 (LIN1) - Body ground B - Body ground Seat heater switch signal Power switch on (IG) Pulse generation
      I54-3 (TSR) - I54-7 (SG-3) P - R Seat heater sensor (for Front Passenger Side) input signal

      Power switch off

      (0 to 30 °C [32 to 86 °F])

      		 26.74 to 8.411 kΩ
      I54-4 (TSL) - I54-8 (SG-6) W - G Seat heater sensor (for Driver Side) input signal

      Power switch off

      (0 to 30 °C [32 to 86 °F])

      		 26.74 to 8.411 kΩ

  2. CHECK AIR CONDITIONING CONTROL ASSEMBLY

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