SEAT HEATER SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    A01MHF9E01

    1. Disconnect the G43 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
      G43-1 (IG+) - Body ground B - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      G43-14 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G43-21 (B) - Body ground GR - Body ground Auxiliary battery power supply Power switch off 11 to 14 V

    3. Reconnect the G43 air conditioning amplifier 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
      G43-11 (CANH) - Body ground LG - Body ground Seat heater switch signal Power switch on (IG) Pulse generation
      G43-12 (CANL) - Body ground W - Body ground Seat heater switch signal Power switch on (IG) Pulse generation
      G43-17 (SHD+) - G43-14 (GND) LG - W-B Seat heater (for Driver Side) input signal

      • Power switch on (IG)

      • Seat heater switch (for Front Driver Side) from OFF to HI

      		 11 to 14 V
      Power switch off Below 1 V
      G43-18 (SHD-) - G43-14 (GND) LG - W-B Seat heater (for Driver Side) input signal

      • Power switch on (IG)

      • Seat heater switch (for Front Driver Side) from OFF to LO

      		 11 to 14 V
      Power switch off Below 1 V
      G43-19 (SHP+) - G43-14 (GND) SB - W-B Seat heater (for Front Passenger Side) drive signal

      • Power switch on (IG)

      • Seat heater switch (for Front Passenger Side) from OFF to HI

      		 11 to 14 V
      Power switch off Below 1 V
      G43-20 (SHP-) - G43-14 (GND) LG - W-B Seat heater (for Front Passenger Side) drive signal

      • Power switch on (IG)

      • Seat heater switch (for Front Passenger Side) from OFF to LO

      		 11 to 14 V
      Power switch off Below 1 V

  2. CHECK INTEGRATION CONTROL PANEL ASSEMBLY

    A01MIB2E01

    1. Disconnect the G49 integration control panel 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
      G49-16 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G49-9 (IG+) - G49-16 (GND) P - W-B IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

    3. Reconnect the G49 integration control panel 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
      G49-4 (CANH) - G49-16 (GND) BR - W-B Seat heater switch signal Power switch on (IG) Pulse generation
      G49-5 (CANL) - G49-16 (GND) W - W-B Seat heater switch signal Power switch on (IG) Pulse generation