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Terminals Of Ecu

  1. A/C AMPLIFIER 
    Fig 1: Identifying Terminals Of A/C Amplifier ECU Connector
    G06037431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

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

    CONNECTOR TERMINALS REFERENCE

    Terminal No. (Symbol) Wiring Color Description Condition Specified Condition
    E8-1 (S5-3) - E8-4 (SG-2)(2) B - G Power supply for A/C pressure sensor Ignition switch: ON 4.75 to 5.25 V
    E8-2 (CANH) - E8-3 (CANL) V - W CAN communication system CAN communication circuit Pulse generation
    E8-4 (SG-2) - Body ground(2) G - Body ground Ground for A/C pressure sensor Always Below 1 V
    E8-6 (PRE) - E8-4 (SG-2)(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)) 4.74 V or higher
    E8-6 (PRE) - E8-4 (SG-2)(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 0.76 V
    E8-6 (PRE) - E8-4 (SG-2)(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)) 0.76 to 4.74 V
    E8-7 (SOL+) - E8-12 (GND)(2) V - W-B A/C compressor operation signal Engine is running System is operating Blower switch: LO Pulse generation (See  awaveform 1)
    E8-8 (IG+) - E8-12 (GND) R - W-B Power source (IG) Ignition switch: off Below 1 V
    E8-8 (IG+) - E8-12 (GND) R - W-B Power source (IG) Ignition switch: ON 11 to 14 V
    E8-9 (SBLW) - E8-12 (GND) GR - W-B Blower motor speed control signal Ignition switch: ON Blower switch: OFF 11 to 14 V
    E8-9 (SBLW) - E8-12 (GND) GR - W-B Blower motor speed control signal Ignition switch: ON Blower switch: LO Below 1 V
    E8-10 (TE) - E8-11 (SG-3)(2) LG - SB A/C evaporator temperature sensor signal Ignition switch: ON Evaporator temperature at 10°C (50°F) 1.7 to 2.0 V
    E8-10 (TE) - E8-11 (SG-3)(2) LG-SB A/C evaporator temperature sensor signal Ignition switch: ON Evaporator temperature at 15°C (59°F) 1.0 to 1.3 V
    E8-11 (SG-3) - Body ground(2) SB - Body ground Ground for A/C evaporator temperature sensor Always Below 1 V
    E8-12 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
    E8-15 (A/C) - E8-12 (GND) Y - W-B A/C switch signal Ignition switch: ON A/C switch: OFF Below 1 V
    E8-15 (A/C) - E8-12 (GND) Y - W-B A/C switch signal Ignition switch: ON A/C switch: ON 11 to 14 V
    E8-16 (LED) - E8-12 (GND)(2) BE - 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)(2) BE - W-B A/C switch indicator light signal Ignition switch: ON A/C switch: ON Blower switch: ON Below 4 V
    E9-1 (B) - E8-12 (GND)(1) BR - W-B Power source (Battery) Always 11 to 14 V
    E9-9 (PTC1) - E8-12 (GND)(1) P - 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
    E9-9 (PTC1) - E8-12 (GND)(1) P - 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
    E9-10 (PTC2) - E8-12 (GND)(1) 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: 65°C (149°F) or lower Light control switch: OFF Blower switch: OFF Below 1 V
    E9-10 (PTC2) - E8-12 (GND)(1) 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
    E9-14 (HEAT) - E8-12 (GND)(1) GR - W-B MAX HOT switch signal Ignition switch: ON MAX HOT switch: OFF Below 1 V
    E9-14 (HEAT) - E8-12 (GND)(1) GR - W-B MAX HOT switch signal Ignition switch: ON MAX HOT switch: ON 11 to 14 V
    E9-23 (HLS) - E8-12 (GND)(1) V - W-B Headlight dimmer signal (for PTC heater function) Light control switch: OFF 11 to 14 V
    E9-23 (HLS) - E8-12 (GND)(1) V - W-B Headlight dimmer signal (for PTC heater function) Light control switch: ON Below 1 V
    E9-24 (ALT) - E9-12 (GND)(1) L - W-B Generator signal (for PTC heater function) Engine is running Pulse generation
    (1) w/ PTC heater
    (2) w/ Manual System
    1. Waveform 1:
      WAVEFORM REFERENCE

      Item Content
      Terminal No. (Symbol) E8-7 (SOL+) - E8-12 (GND)
      Tool Setting 5V/DIV., 500 μs/DIV.
      Vehicle Condition Engine is running
      A/C switch: ON
      Blower switch: LO
      Fig 2: Identifying Waveform 1
      G04978885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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