AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) TERMINALS OF ECU


  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    A012MKYN02

    Tech Tips

    Check from the rear of the connector while it is connected to the air conditioning amplifier assembly.

    Terminal No.

    (Symbol)

    		 Wiring Color Terminal Description Condition Specified Condition
    E62-1 (IG+) - E62-23 (GND) L - BR Power source (IG) Ignition switch ON 11 to 14 V
    E62-1 (IG+) - E62-23 (GND) L - BR Power source (IG) Ignition switch off Below 1 V
    E62-2 (A/C) - E62-23 (GND) V - BR A/C switch signal

    • Ignition switch ON

    • A/C switch: On

    		 11 to 14 V
    E62-2 (A/C) - E62-23 (GND) V - BR A/C switch signal

    • Ignition switch ON

    • A/C switch: Off

    		 Below 1 V
    E62-3 (HEAT) - E62-23 (GND)*3 LG - BR MAX HOT switch signal

    • Ignition switch ON

    • MAX HOT switch: Off

    		 Below 1 V
    E62-3 (HEAT) - E62-23 (GND)*3 LG - BR MAX HOT switch signal

    • Ignition switch ON

    • MAX HOT switch: On

    		 11 to 14 V
    E62-4 (TE) - E62-15 (SG-3) W - P No. 1 cooler thermistor sensor signal

    • Ignition switch ON

    • Evaporator temperature: 0°C (32°F)

    		 1.7 to 2.1 V
    E62-4 (TE) - E62-15 (SG-3) W - P No. 1 cooler thermistor signal

    • Ignition switch ON

    • Evaporator temperature: 15°C (59°F)

    		 0.9 to 1.3 V
    E62-5 (SG-2) - Body ground G - Body ground Ground for air conditioner pressure sensor Always Below 1 V
    E62-7 (PRE) - E62-5 (SG-2) L - G Air conditioner pressure sensor signal

    • Engine running

    • A/C system operating

    • Refrigerant pressure: Abnormal pressure (more than 3025 kPa (30.8 kgf/cm2, 439 psi))

    		 4.62 V or higher
    E62-7 (PRE) - E62-5 (SG-2) L - G Air conditioner pressure sensor signal

    • Engine running

    • A/C system operating

    • Refrigerant pressure: Abnormal pressure (less than 176 kPa (1.8 kgf/cm2, 26 psi))

    		 Below 0.74 V
    E62-7 (PRE) - E62-5 (SG-2) L - G Air conditioner pressure sensor signal

    • Engine running

    • A/C system operating

    • Refrigerant pressure: Normal pressure (less than 3025 kPa (30.8 kgf/cm2, 439 psi) and more than 176 kPa (1.8 kgf/cm2, 26 psi))

    		 0.74 to 4.62 V
    E62-8 (CANH) - E62-9 (CANL) Y - W CAN communication system CAN communication circuit Pulse generation
    E62-11 (SOL+) - E62-23 (GND) LG - BR Compressor solenoid operation signal

    • Engine running

    • A/C switch: On

    • Blower switch: LO

    Pulse generation

    (See waveform 1)
    E62-13 (PTC1) - E62-23 (GND)*3 W - BR Quick heater assembly operation signal

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 75 °C or lower

    • Light control switch assembly off

    • Blower switch: On

    		 Below 1 V
    E62-13 (PTC1) - E62-23 (GND)*3 W - BR Quick heater assembly operation signal

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 75 °C or lower

    • Light control switch assembly on

    • Blower switch: Off

    		 11 to 14 V
    E62-14 (HR) - E62-23 (GND)

    GR - BR*1

    SB - BR*2

    		 Heater relay operation signal

    • Ignition switch ON

    • Blower switch: LO

    		 Below 1 V
    E62-14 (HR) - E62-23 (GND)

    GR - BR*1

    SB - BR*2

    		 Heater relay operation signal

    • Ignition switch ON

    • Blower switch: Off

    		 11 to 14 V
    E62-15 (SG-3) - Body ground P - Body ground Ground for No. 1 cooler thermistor Always Below 1 V
    E62-16 (LED) - E62-23 (GND) GR - BR A/C switch indicator signal

    • Ignition switch ON

    • A/C switch: On

    • Blower switch: On

    		 Below 1 V
    E62-16 (LED) - E62-23 (GND) GR - BR A/C switch indicator signal

    • Ignition switch ON

    • A/C switch: Off

    • Blower switch: On

    		 11 to 14 V
    E62-17 (SBLW) - E62-23 (GND) L - BR Blower motor operation condition signal

    • Ignition switch ON

    • Blower switch: On

    		 Below 1 V
    E62-17 (SBLW) - E62-23 (GND) L - BR Blower motor operation condition signal

    • Ignition switch ON

    • Blower switch: Off

    		 11 to 14 V
    E62-19 (PTC2) - E62-23 (GND)*3 R - BR Quick heater assembly operation signal

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 65 °C or lower

    • Light control switch assembly off

    • Blower switch: On

    		 Below 1 V
    E62-19 (PTC2) - E62-23 (GND)*3 R - BR Quick heater assembly operation signal

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 65 °C or lower

    • Light control switch assembly on

    • Blower switch: Off

    		 11 to 14 V
    E62-20 (PTC3) - E62-23 (GND)*3 P - BR Quick heater assembly operation signal

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 70 °C or lower

    • Light control switch assembly off

    • Blower switch: On

    		 Below 1 V
    E62-20 (PTC3) - E62-23 (GND)*3 P - BR Quick heater assembly operation signal

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 70 °C or lower

    • Light control switch assembly on

    • Blower switch: Off

    		 11 to 14 V
    E62-21 (HLS) - E62-23 (GND)*3 V - BR Headlight dimmer signal (for PTC heater function) Light control switch assembly off 11 to 14 V
    E62-21 (HLS) - E62-23 (GND)*3 V - BR Headlight dimmer signal (for PTC heater function) Light control switch assembly on Below 1 V
    E62-23 (GND) - Body ground BR - Body ground Ground for main power supply Always Below 1 V
    E62-24 (S5-3) - E62-5 (SG-2) B - G Power supply for air conditioner pressure sensor Ignition switch ON 4.75 to 5.25 V
    E62-24 (S5-3) - E62-5 (SG-2) B - G Power supply for air conditioner pressure sensor Ignition switch off Below 1 V

    • *1: for RHD

    • *2: for LHD

    • *3: w/ PTC heater


    1. A012KPXN03

      Waveform 1:

      Item Content
      Terminal No. E62-11 (SOL+) - E62-23 (GND)
      Tool Setting 5 V/DIV., 500 μs/DIV.
      Vehicle Condition

      • Engine running

      • A/C switch: On

      • Blower switch: LO