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Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
  1. AIR CONDITIONING AMPLIFIER 
    Fig 1: Identifying Air Conditioning Amplifier Connectors
    G05755208Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

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

    TERMINALS OF ECU

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    J58-1 (B) - J58-20 (GND) Y - W-B Power source (Back-up) Always 11 to 14 V
    J58-2 (MHTR) - J58-20 (GND) BR - W-B MIR/HTR relay signal Engine switch on (IG), REAR DEF switch OFF 11 to 14V
    J58-2 (MHTR) - J58-20 (GND) BR - W-B MIR/HTR relay signal Engine switch on (IG), REAR DEF switch ON Below 1 V
    J58-3 (RDFG) - J58-20 (GND) B - W-B DEFOG relay signal Engine switch on (IG), FRONT DEF switch OFF 11 to 14 V
    J58-3 (RDFG) - J58-20 (GND) B - W-B DEFOG relay signal Engine switch on (IG), FRONT DEF switch ON Below 1 V
    J58-5 (SOL+) - J58-20 (GND) G - W-B A/C compressor operation signal Engine switch on (IG), A/C switch ON Pulse generation (See  awaveform 1)
    J58-11 (BLW) - J58-20 (GND) O - W-B Blower motor speed control signal Engine switch on (IG), Blower switch ON Pulse generation (See  bwaveform 2)
    J58-13 (PRE) - J58-38 (SG-2) V-P A/C pressure sensor signal Start engine, Operate A/C system, Refrigerant pressure Abnormal pressure (more than 3030 kPa (31 0 kgf/cm2 , 440 psi)) 4 77 V or higher
    J58-13 (PRE) - J58-38 (SG-2) V-P A/C pressure sensor signal Start engine, Operate A/C system, Refrigerant pressure Abnormal pressure (less than 180 kPa (1 9 kgf/cm2 , 27 psi)) Below 0 767 V
    J58-13 (PRE) - J58-38 (SG-2) V-P A/C pressure sensor signal Start engine, Operate A/C system, Refrigerant pressure Normal pressure (less than 3030 kPa (31 0 kgf/cm2 ,440 psi) and more than 180 kPa (1 9 kgf/cm2 , 27 psi)) 0 767 to 4 77 V
    J58-14 (TSP) - J58-20 (GND) P - W-B Passenger side solar sensor signal Engine switch on (IG), Solar sensor subjected to electric light 0 8 to 4 3 V
    J58-14 (TSP) - J58-20 (GND) P - W-B Passenger side solar sensor signal Engine switch on (IG), Solar sensor is covered with a cloth Below 0 8V
    J58-16 (TR) - J58-19 (SG-D G-L Room temperature sensor signal Engine switch on (IG), Cabin temperature 25°C (77°F) 1 9 to 2 1 V
    J58-16 (TR) - J58-19 (SG-D G-L Room temperature sensor signal Engine switch on (IG), Cabin temperature 40°C(104°F) 1 3 to 1 5 V
    J58-19 (SG-1) - Body ground L - Body ground Ground for room temperature sensor Always Below 1 V
    J58-20 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
    J58-21 (IG+) - J58-20 (GND) B - W-B Power source (IG) Engine switch on (IG) 11 to 14 V
    J58-21 (IG+) - J58-20 (GND) B - W-B Power source (IG) Engine switch off Below 1 V
    J58-26 (S5-2) - J58-38 (SG-2) W-P Power supply for A/C pressure sensor Engine switch on (IG), A/C switch ON 4 75 to 5 25 V
    J58-26 (S5-2) - J58-38 (SG-2) W-P Power supply for A/C pressure sensor Engine switch on (IG), A/C switch OFF Below 1 V
    J58-30 (MPX+) - J58-20 (GND) BR - W-B Multiplex communication system Engine idling after engine warmed up Pulse generation
    J58-31 (MPX-) - J58-20 (GND) BR - W-B Multiplex communication system Engine idling after engine warmed up Pulse generation
    J58-33 (DGS1) - J58-39 (SG-6) R-Y Smog ventilation sensor signal (NOx) After 30 seconds from engine switch on (IG) and sensor is exposed to exhaust gas 1 0 to 4 5 V
    J58-34 (DGS) - J58-39 (SG-6) BR-Y Smog ventilation sensor signal (HC, CO) After 30 seconds from engine switch on (IG) and sensor is exposed to exhaust gas 1 0 to 4 5 V
    J58-35 (TSD) - J58-20 (GND) LG - W-B Driver side solar sensor signal Engine switch on (IG), Solar sensor subjected to electric light 0 8 to 4 3 V
    J58-35 (TSD) - J58-20 (GND) LG - W-B Driver side solar sensor signal Engine switch on (IG), Solar sensor is covered with a cloth Below 0 8V
    J58-36 (TAM) - J58-37 (SG) L-LG Ambient temperature sensor signal Engine switch on (IG), Ambient temperature 25°C (77°F) 1 35 to 1 75 V
    J58-36 (TAM) - J58-37 (SG) L-LG Ambient temperature sensor signal Engine switch on (IG), Ambient temperature 40°C (104°F) 0 9 to 1 2 V
    J58-37 (SG) - Body ground LG - Body ground Ground for ambient temperature sensor Always Below 1 V
    J58-38 (SG-2) - Body ground P - Body ground Ground for A/C pressure sensor Always Below 1 V
    J58-39 (SG-6) - Body ground Y - Body ground Ground for smog ventilation sensor Always Below 1 V
    e1-2 (BUS G) - Body ground - Ground for BUS IC Always Below 1 V
    e1-3 (BUS) - e1-2 (BUS G) - BUS IC control signal Engine switch off → on (IG) Pulse generation
    e1-4 (BBUS) - e1-2 (BUS G) - Power supply for BUS IC Engine switch on (IG) 11 to 14 V
    e1-4 (BBUS) - e1-2 (BUS G) - Power supply for BUS IC Engine switch off Below 1 V
    e1-5 (SG) - Body ground - Ground for evaporator temperature sensor signal Always Below 1 V
    e1-6 (TE) - e1-5(SG) - Evaporator temperature sensor signal Engine switch on (IG), Evaporator temperature 0°C (32°F) 1 7 to 2 1 V
    e1-6 (TE) - e1-5(SG) - Evaporator temperature sensor signal Engine switch on (IG), Evaporator temperature 15°C (59°F) 0 9 to 1 3 V
    1. Waveform 1
      WAVEFORM 1 REFERENCE CHART

      Item Contents
      Terminal No (Symbol) J58-5 (SOL+) - J58-20 (GND)
      Tool Setting 5V/DIV, 500 μs/DIV
      Vehicle Condition Engine switch on (IG) A/C switch ON
      Fig 2: Waveform 1 Reference Graph
      G04978885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Waveform 2
      WAVEFORM 2 REFERENCE CHART

      Item Contents
      Terminal No (Symbol) J58-11 (BLW) - J58-20 (GND)
      Tool Setting 1 V/DIV, 500 μs/DIV
      Vehicle Condition Engine switch on (IG)
      Blower switch ON
      Fig 3: Waveform 2 Reference Graph
      G04978887Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INTEGRATION CONTROL & PANEL ASSEMBLY (w/o Navigation System) 
    Fig 4: Identifying Integration Control & Panel Assembly Connector
    G05755211Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL NUMBER AND TERMINAL DESCRIPTION

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    J54-4 (IG+) - J54-8 (E) B - W-B Power source (IG) Engine switch on (IG) 11 to 14 V
    J54-4 (IG+) - J54-8 (E) B - W-B Power source (IG) Engine switch off Below 1 V
    J54-5 (ACC) - J54-8 (E) O - W-B Power source (ACC) Engine switch on (ACC) 11 to 14 V
    J54-5 (ACC) - J54-8 (E) O - W-B Power source (ACC) Engine switch off Below 1 V
    J54-8 (E) - Body ground W-B - Body ground Ground for heater control panel Always Below 1 V
    J54-14 (B) - J54-8 (E) LG - W-B Power source (Back-up) Always 11 to 14 V
  3. MULTI-DISPLAY (w/ Navigation System)  (See TERMINALS OF ECU )
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