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Home >> Toyota >> 2009 >> Corolla S, 1.8 L, Standard >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating / Air Conditioning >> AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) >> Terminals Of Ecu

Terminals Of Ecu

  1. A/C AMPLIFIER 
    Fig 1: Identifying ECU Connector Terminals
    G06016488Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    Check from the rear of the connector while it is connected to the A/C amplifier.

    TERMINALS DESCRIPTION

    Terminal No. (Symbol) Wiring Color Description Condition Specified Condition
    E62-1 (S5-3) - E62-4 (SG-2) B - G Power supply for A/C pressure sensor Ignition switch ON 4.75 to 5.25 V
    E62-2 (CANH) - E62-3 (CANL) V - W CAN communication system CAN communication circuit Pulse generation
    E62-4 (SG-2) - Body ground G - Body ground Ground for A/C pressure sensor Always Below 1 V
    E62-6 (PRE) - E62-4 (SG-2) L - G A/C pressure sensor signal Engine is running
    A/C system is operating
    Refrigerant pressure: Abnormal pressure (more than 3140 kPa (32.0 kgf/cm2 , 455 psi))    		 4.848 V or higher
    E62-6 (PRE) - E62-4 (SG-2) L-G A/C pressure sensor signal Engine is running
    A/C system is operating
    Refrigerant pressure: Abnormal pressure (less than 196 kPa (2.0 kgf/cm2 , 28 psi))    		 Below 0.734 V
    E62-6 (PRE) - E62-4 (SG-2) L-G A/C pressure sensor signal Engine is running
    A/C system is operating
    Refrigerant pressure: Normal pressure (less than 3140 kPa (32.0 kgf/cm2 , 455 psi) and more than 196 kPa (2.0 kgf/cm2 , 28 psi))    		 0.734 to 4.848 V
    E62-7 (SOL+) - E62-12 (GND) LG*1, V*2 - W-B A/C compressor operation signal Engine is running
    A/C switch: ON
    Blower switch: LO    		 Pulse generation (See  awaveform 1)
    E62-8 (IG+) - E62-12 (GND) Y*1, R*2 - W-B Power source (IG) Ignition switch off Below 1 V
    E62-8 (IG+) - E62-12 (GND) Y*1, R*2 - W-B Power source (IG) Ignition switch ON 11 to 14 V
    E62-9 (SBLW) - E62-12 (GND) O*1, GR*2 - W-B Blower motor speed control signal Ignition switch ON
    Blower switch: OFF    		 11 to 14 V
    E62-9 (SBLW) - E62-12 (GND) O*1, GR*2 - W-B Blower motor speed control signal Ignition switch ON
    Blower switch: LO    		 Below 1 V
    E62-10 (TE) - E62-11 (SG-3) W*1, LG*2 - P*1, SB*2 A/C evaporator temperature sensor signal Ignition switch ON
    Evaporator temperature at 10°C (50°F)    		 1.7 to 2.0 V
    E62-10 (TE) - E62-11 (SG-3) W*1, LG*2 - P*1, SB*2 A/C evaporator temperature sensor signal Ignition switch ON
    Evaporator temperature at 15°C (59°F)    		 1.0 to 1.3 V
    E62-11 (SG-3) - Body ground P*1, SB*2 - Body ground Ground for A/C evaporator temperature sensor Always Below 1 V
    E62-12 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
    E62-15 (A/C) - E62-12 (GND) L*1, Y*2 - W-B A/C switch signal Ignition switch ON
    A/C switch: OFF    		 Below 1 V
    E62-15 (A/C) - E62-12 (GND) L*1, Y*2 - W-B A/C switch signal Ignition switch ON
    A/C switch: ON    		 11 to 14 V
    E62-16 (LED) - E62-12 (GND) GR*1, BE*2 - W-B A/C switch indicator light signal Ignition switch ON
    A/C switch: OFF
    Blower switch: ON    		 11 to 14 V
    E62-16 (LED) - E62-12 (GND) GR*1, BE*2 - W-B A/C switch indicator light signal Ignition switch ON
    A/C switch: ON
    Blower switch: ON    		 Below 4 V
    E63-1 (B) - E62-12 (GND)*3 W*1, BR*2 - W-B Power source (Battery) Always 11 to 14 V
    E63-9 (PTC1) - E62-12 (GND)*3 W*1, P*2 - W-B PTC heater operation signal Ignition switch ON
    Temperature setting: MAX HOT
    Ambient temperature: 10°C (50°F) or lower
    Engine coolant temperature: 65°C (149°F) or lower
    Light control switch: OFF Blower switch: OFF    		 Below 1 V
    E63-9 (PTC1) - E62-12 (GND)*3 W*1, P*2 - W-B PTC heater operation signal Engine is running (1250 rpm or higher)
    Temperature setting: MAX HOT
    Ambient temperature: 10°C (50°F) or lower
    Engine coolant temperature: 75°C (167°F) or lower
    Light control switch: OFF Blower switch: LO    		 11 to 14 V
    E63-10 (PTC2) - E62-12 (GND)*3 B - W-B PTC heater operation signal Ignition switch ON
    Temperature setting: MAX HOT
    Ambient temperature: 10°C (50°F) or lower
    Engine coolant temperature: 70°C (158°F) or lower
    Light control switch: OFF Blower switch: OFF    		 Below 1 V
    E63-10 (PTC2) - E62-12 (GND)*3 B - W-B PTC heater operation signal Engine is running (1250 rpm or higher)
    Temperature setting: MAX HOT
    Ambient temperature: 10°C (50°F) or lower
    Engine coolant temperature: 65°C (149°F) or lower
    Light control switch: OFF
    Blower switch: LO    		 11 to 14 V
    E63-14 (HEAT) - E62-12 (GND)*3 LG*1, GR*2 - W-B MAX HOT switch signal Ignition switch ON
    MAX HOT switch: OFF    		 Below 1 V
    E63-14 (HEAT) - E62-12 (GND)*3 LG*1, GR*2 - W-B MAX HOT switch signal Ignition switch ON
    MAX HOT switch: ON    		 11 to 14 V
    E63-23 (HLS) - E62-12 (GND)*3 B*1, V*2 - W-B Headlight dimmer signal (for PTC heater function) Light control switch: OFF 11 to 14 V
    E63-23 (HLS) - E62-12 (GND)*3 B*1, V*2 - W-B Headlight dimmer signal (for PTC heater function) Light control switch: ON Below 1 V
    E63-24 (ALT) - E62-12 (GND)*3 L - W-B Generator signal (for PTC heater function) Engine is running Pulse generation
    HINT:
    • *1: TMC Made
    • *2: NUMMI, TMMC Made
    • *3: w/PTC Heater
    1. Waveform 1
    ITEM CHART

    Item Content
    Terminal No. (Symbol) E62-7 (SOL+) - E62-12 (GND)
    Tool Setting 5 V/DIV., 500 μs/DIV.
    Vehicle Condition Engine is running
    A/C switch: ON
    Blower switch: LO
    Fig 2: Waveform Graph 1
    G04978885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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