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Terminals Of Ecu

  1. CHECK POWER MANAGEMENT CONTROL ECU 
    Fig 1: Power Management Control ECU Connector Terminal Identification
    GTY306739Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A35 and D89 connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A35-2 (STA) - Body ground B-L - Body ground Starter relay operation signal Always 93.8 to 136.4 Ω
      A35-3 (STAR) - Body ground P - Body ground Park neutral position switch signal Shift lever in P or N 93.8 to 136.4 Ω
      A35-3 (STAR) - Body ground P - Body ground Park neutral position switch signal Shift lever in except P or N 10 kΩ or higher
      A35-8 (IG2D) - Body ground P-B - Body ground IG2 relay operation signal Always 131 to 387 Ω
      A35-11 (STP1) - Body ground L - Body ground Stop light switch signal Brake pedal depressed 11 to 14 V
      A35-11 (STP1) - Body ground L - Body ground Stop light switch signal Brake pedal released Below 1 V
      D89-1 (AM22) - Body ground R - Body ground +B power supply Always 9.5 to 14 V
      D89-2 (AM21) - Body ground R - Body ground +B power supply Always 9.5 to 14 V
      D89-3 (SLP) - Body ground G - Body ground Steering lock actuator position signal Always 10 kΩ or higher
      D89-5 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D89-6 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D89-8 (SLR+) - Body ground V - Body ground Steering lock motor signal Always 10 kΩ or higher
      D89-11 (CA3N) - Body ground W - Body ground CAN communication line Always 10 kΩ or higher
      D89-12 (CA3P) - Body ground G - Body ground CAN communication line Always 10 kΩ or higher
      D89-13 (CA1L) - Body ground W - Body ground CAN communication line Always 10 kΩ or higher
      D89-14 (CA1H) - Body ground LG - Body ground CAN communication line Always 10 kΩ or higher
      D89-17 (SSW2) - Body ground B - Body ground Engine switch signal Engine switch pushed Below 1 Ω
      D89-17 (SSW2) - Body ground B - Body ground Engine switch signal Engine switch not pushed 10 kΩ or higher
      D89-18 (SSW1) - Body ground L - Body ground Engine switch signal Engine switch pushed Below 1 Ω
      D89-18 (SSW1) - Body ground L - Body ground Engine switch signal Engine switch not pushed 10 kΩ or higher
      D89-20 (IG1D) - Body ground Y - Body ground IG1 relay operation signal Always 50.63 to 123.75 Ω
      D89-24 (LIN2) - Body ground BR - Body ground LIN communication line Always 10 kΩ or higher

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the A35 and D89 connectors.
    4. Measure the voltage and check pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A35-4 (NE) - D89-6 (GND) G - W-B Crankshaft position sensor signal Idling with warm engine Pulse generation
      (See waveform 1Fig 2)
      A35-8 (IG2D) - D89-6 (GND) P-B - W-B IG2 signal Engine switch on (IG) 9 V or higher
      A35-8 (IG2D) - D89-6 (GND) P-B - W-B IG2 signal Engine switch on (ACC) 1 V or less
      D89-3 (SLP) - D89-6 (GND) G - W-B Steering lock actuator signal Steering lock released Pulse generation
      (See waveform 2Fig 3)
      D89-3 (SLP) - D89-6 (GND) G - W-B Steering lock actuator signal Shift lever in P
      Steering lock locked      		 Pulse generation
      (See waveform 2Fig 3)
      D89-8 (SLR+) - D89-6 (GND) V - W-B Steering motor signal Steering lock motor operating Pulse generation
      (See waveform 3Fig 4)
      D89-8 (SLR+) - D89-6 (GND) V - W-B Steering motor signal Steering lock motor not operating Pulse generation
      (See waveform 3Fig 4)
      D89-10 (INDW) - D89-6 (GND) G - W-B Warning signal Brake pedal depressed, shift lever in P, engine switch on (ACC, IG) 8 to 14 V
      D89-16 (P) - D89-6 (GND) R - W-B Shift lock signal Shift lever in P 8 to 14 V
      D89-16 (P) - D89-6 (GND) R - W-B Shift lock signal Shift lever not in P 1.5 V or less
      D89-17 (SSW2) - D89-6 (GND) B - W-B Engine switch signal Engine switch not pushed 9 V or higher
      D89-17 (SSW2) - D89-6 (GND) B - W-B Engine switch signal Engine switch pushed 1 V or less
      D89-18 (SSW1) - D89-6 (GND) L - W-B Engine switch signal Engine switch not pushed 9 V or higher
      D89-18 (SSW1) - D89-6 (GND) L - W-B Engine switch signal Engine switch pushed 1 V or less
      D89-19 (ACCD) - D89-6 (GND) L - W-B ACC signal Engine switch on (ACC) 8.5 V or higher
      D89-19 (ACCD) - D89-6 (GND) L - W-B ACC signal Engine switch off 1 V or less
      D89-20 (IG1D) - D89-6 (GND) Y - W-B IG1 signal Engine switch on (IG) 9 V or higher
      D89-20 (IG1D) - D89-6 (GND) Y - W-B IG1 signal Engine switch on (ACC) 1 V or less
      D89-22 (INDS) - D89-6 (GND) Y - W-B Vehicle condition signal Brake pedal depressed, shift lever in P 8 to 14 V
      D89-23 (SPD) - D89-6 (GND) LG - W-B Vehicle speed signal Engine switch on (IG), wheel rotated slowly Pulse generation
      (See waveform 4Fig 5)

      If the result is not as specified, the ECU may have a malfunction.

    5. Using an oscilloscope, check the signal waveform of the ECU.
      1. Waveform 1
        Fig 2: Identifying Waveform 1
        GTY265856Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Tester Connection A35-4 (NE) - D89-6 (GND)
        Tool Setting 1 V/DIV., 2 ms./DIV.
        Vehicle Condition Idling with warm engine

        HINT: 

        The wavelength becomes shorter as the engine speed increases.

      2. Waveform 2
        Fig 3: Identifying Waveform 2 Graph
        GTY300047Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Tester Connection D89-3 (SLP) - D89-6 (GND)
        Tool Setting 2 V/DIV., 100 ms./DIV.
        Vehicle Condition Steering lock/unlock
        TEXT IN ILLUSTRATION

        *a Lock
        *b Unlock
        *c GND
      3. Waveform 3
        Fig 4: Identifying Waveform 3 Graph
        GTY302834Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Tester Connection D89-8 (SLR+) - D89-6 (GND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Vehicle Condition Steering lock motor not operating →
        Steering lock motor operating →
        Steering lock motor not operating
        TEXT IN ILLUSTRATION

        *a Steering lock motor not operating
        *b Steering lock motor operating
      4. Waveform 4
        Fig 5: Identifying Waveform 4
        GTY138951Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Tester Connection D89-23 (SPD) - D89-6 (GND)
        Tool Setting 5 V/DIV., 10 ms./DIV.
        Vehicle Condition Driving at approx. 20 km/h (12 mph)

        HINT: 

        The wavelength becomes shorter as the vehicle speed increases.

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    Fig 6: ECM Connector Terminal Identification - D88 Certification ECU (Smart Key ECU Assembly)
    GTY298078Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D88 connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D88-1 (+B) - Body ground G - Body ground +B power supply Always 11 to 14 V
      D88-11 (SWIL) - Body ground SB - Body ground Illumination signal Light control switch tail or head 8 to 14 V
      D88-15 (E)- Body ground W-B - Body ground Ground Always Below 1 Ω
      D88-16 (IG) - Body ground B - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      D88-29 (LIN) - Body ground Y - Body ground LIN communication line Always 10 kΩ or higher

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the D88 connector.
    4. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D88-11 (SWIL) - Body ground SB - Body ground Illumination signal Light control switch tail or head 8 to 14 V

      If the result is not as specified, the ECU may have a malfunction.

  3. CHECK STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) 
    Fig 7: Steering Lock ECU D29 Connector Terminal Identification
    GTY306428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D29 connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D29-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D29-6 (IG2) - Body ground B - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      D29-6 (IG2) - Body ground B - Body ground Ignition power supply Engine switch off Below 1 V
      D29-7 (B) - Body ground R - Body ground +B power supply Always 11 to 14 V
      • If the result is not as specified, there may be a malfunction on the wire harness side.
    3. Reconnect the D29 connector.
    4. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D29-4 (SLP1) - D29-1 (GND) G - W-B Steering lock actuator position signal Steering locked 11 to 14 V
      D29-4 (SLP1) - D29-1 (GND) G - W-B Steering lock actuator position signal Steering released Below 1 V
      • If the result is not as specified, the ECU may have a malfunction.
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