SEAT HEATER SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for Automatic Air Conditioning System with Top-mounted Air Conditioner Pressure Sensor)

    B008LANN03

    1. Disconnect the 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
      F72-5 (IG+) - Body ground B - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      F72-29 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      F72-1 (B) - Body ground V - Body ground Battery power supply Always 11 to 14 V

    3. Reconnect the air conditioning amplifier assembly connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      F72-3 (LIN1) - Body ground L - Body ground Seat heater switch signal Ignition switch ON Pulse generation

  2. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for Automatic Air Conditioning System with Side-mounted Air Conditioner Pressure Sensor)

    B008MBCN09

    1. Disconnect the 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
      F73-2 (IG+) - Body ground B - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      F73-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      F73-1 (B) - Body ground V - Body ground Battery power supply Always 11 to 14 V

    3. Reconnect the air conditioning amplifier assembly connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      F73-14 (LIN1) - Body ground BE - Body ground Seat heater switch signal Ignition switch ON Pulse generation

  3. CHECK AIR CONDITIONING CONTROL ASSEMBLY

    B008L6ZN07

    1. Disconnect the air conditioning control 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
      F61-16 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      F61-10 (IG+) - F61-16 (GND) BE - W-B IG power supply Ignition switch ON

      11 to 14 V*1

      10.5 to 16 V*2
      Ignition switch off Below 1 V

      • *1: w/o Stop and Start System

      • *2: w/ Stop and Start System

    3. Reconnect the air conditioning control assembly 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
      F61-2 (LIN1) - F61-16 (GND) L - W-B Seat heater switch signal Ignition switch ON Pulse generation
      F61-4 (RV) - F61-16 (GND) SB - W-B Seat heater switch volume signal Ignition switch ON, seat heater switch (for front passenger side) off Below 0.6 V
      Ignition switch ON, seat heater switch (for front passenger side) HI 3.9 to 5.5 V
      Ignition switch ON, seat heater switch (for front passenger side) MID 3.4 to 4.7 V
      Ignition switch ON, seat heater switch (for front passenger side) LO 2.5 to 3.5 V
      F61-11 (SW) - F61-16 (GND) R - W-B Seat heater switch volume signal Ignition switch ON, seat heater switch (for front passenger side) off Below 1 V
      Ignition switch ON, seat heater switch (for front passenger side) on 11 to 14 V
      F61-6 (RV) - F61-16 (GND) LG - W-B Seat heater switch volume signal Ignition switch ON, seat heater switch (for driver side) off Below 0.6 V
      Ignition switch ON, seat heater switch (for driver side) HI 3.9 to 5.5 V
      Ignition switch ON, seat heater switch (for driver side) MID 3.4 to 4.7 V
      Ignition switch ON, seat heater switch (for driver side) LO 2.5 to 3.5 V
      F61-12 (SW) - F61-16 (GND) P - W-B Seat heater switch volume signal Ignition switch ON, seat heater switch (for driver side) off Below 1 V
      Ignition switch ON, seat heater switch (for driver side) on 11 to 14 V