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Terminals Of Ecu

WARNING: This page is about a different car, the 2012 Lexus CT 200h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK POWER MANAGEMENT CONTROL ECU 
    Fig 1: Identifying Check Power Management Control ECU Connector Terminals Identification
    GTY347987Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A20-7 (ST1-) - H3-6 (E1) R - W-B Stop light switch signal Power switch on (IG), Brake pedal released 7.5 to 14 V
    A20-7 (ST1-) - H3-6 (E1) R - W-B Stop light switch signal Power switch on (IG), Brake pedal depressed Below 1 V
    A20-23 (STP) - H3-6 (E1) L - W-B Stop light switch signal Brake pedal released Below 1 V
    A20-23 (STP) - H3-6 (E1) L - W-B Stop light switch signal Brake pedal depressed 7.5 to 14 V
    H3-6 (E1) - Body ground W-B - Body ground Earth (ground) circuit of power management control ECU Always Below 1 Ω
    H3-11 (TC) - H3-6 (E1) L - W-B Terminal TC of DLC3 Power switch on (IG) 11 to 14 V
    H3-11 (TC) - H3-6 (E1) L - W-B Terminal TC of DLC3 Terminals TC and CG of DLC3 connected Below 1 V
    H3-14 (SPDI) - H3-6 (E1) V - W-B Vehicle speed signal Driving at 20 km/h (12 mph) Pulse generation
    (see waveform 1Fig 2)
    H4-22 (CCS) - H3-6 (E1) SB - W-B Cruise control switch circuit Power switch on (IG) 11 to 14 V
    H4-22 (CCS) - H3-6 (E1) SB - W-B Cruise control switch circuit Power switch on (IG), Cruise control switch on Below 1 V
    H4-22 (CCS) - H3-6 (E1) SB - W-B Cruise control switch circuit Power switch on (IG), +/RES switch on 2.3 to 4.0 V
    H4-22 (CCS) - H3-6 (E1) SB - W-B Cruise control switch circuit Power switch on (IG), -/SET switch on 4.5 to 7.1 V
    H4-22 (CCS) - H3-6 (E1) SB - W-B Cruise control switch circuit Power switch on (IG), CANCEL switch on 6.6 to 10.1 V
    H4-24 (CA1L) - H3-6 (E1) V - W-B CAN communication line Power switch on (IG) Pulse generation
    (see waveform 2Fig 3)
    H4-25 (CA1H) - H3-6 (E1) P - W-B CAN communication line Power switch on (IG) Pulse generation
    (see waveform 3Fig 4)
    1. WAVEFORM 1
      Fig 2: Waveform Graph 1
      GTY191968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Vehicle speed signal
        Power Management Control ECU Terminal Name Between H3-14 (SPDI) and H3-6 (E1)
        Tester Range 5 V/DIV., 20 ms./DIV.
        Condition Driving at 20 km/h (12 mph)

        HINT: 

        • The wavelength becomes shorter as the vehicle speed increases.
        • Depending on the vehicle, the output waveform voltage may rise to 12 V if influenced by optionally installed systems.
    2. WAVEFORM 2
      Fig 3: Identifying Waveform 2
      GTY229528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        Power Management Control ECU Terminal Name Between H4-24 (CA1L) and H3-6 (E1)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

    3. WAVEFORM 3
      Fig 4: Identifying Waveform 3
      GTY222725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        Power Management Control ECU Terminal Name Between H4-25 (CA1H) and H3-6 (E1)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

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