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Terminals Of Ecu

  1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) 
    Fig 1: Main Body ECU Connector Terminal Identification (Driver Side Junction Block)
    GTY117441Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DA, DD, DF, L12 and L13 ECU connectors.
    2. Measure the resistance and voltage according to value(s) in the table below.
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      DA-40 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DF-1 (ACC) - DA-40 (GND2) B - W-B ACC power supply Always 11 to 14 V
      DF-1 (IG) - DA-40 (GND2) B - W-B IG power supply Always 11 to 14 V
      L13-24 (DCTY) - Body ground W - Body ground Driver side door courtesy light switch input Driver side door open Below 1 Ω
      Driver side door closed 10 kΩ or higher
      L12-21 (PCTY) - Body ground L - Body ground Passenger side door courtesy light switch input Passenger side door open Below 1 Ω
      Passenger side door closed 10 kΩ or higher
      L12-7 (RCTY) - Body ground R - Body ground Rear RH side door courtesy light switch input Rear side door RH open Below 1 Ω
      Rear side door RH closed 10 kΩ or higher
      DD-12 (LCTY) - Body ground L - Body ground Rear LH side door courtesy light switch input Rear side door LH open Below 1 Ω
      Rear side door LH closed 10 kΩ or higher
      • If the result is not as specified, there may be a malfunction on the wire harness side.
    3. Reconnect the DA, DD, DF, L12 and L13 ECU connectors.
    4. Measure the voltage according to the value(s) in the table below.
    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    L11-14 (HAZ) - Body ground BE - Body ground Turn signal light drive Hazard warning signal switch ON Pulse generation
    Hazard warning signal switch OFF Below 1 V
    • If the result is not as specified, the ECU may have a malfunction.
  2. CHECK FRONT MULTIPLEX NETWORK LIGHT ECU (FRONT CONTROLLER) 
    Fig 2: Identifying A51, A50, A52 And B14 Connectors Terminal Identification
    GTY152411Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A50 and A52 ECU connectors.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A50-2 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A52-1 (BATB) - Body ground P - Body ground Power supply Always 11 to 14 V
      A52-5 (ALTB) - Body ground L - Body ground 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 A50 and A52 ECU connectors.
    4. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A52-14 (BZR) - Body ground B - Body ground Wireless door lock buzzer output Wireless door lock buzzer ON 11 to 14 V
      Wireless door lock buzzer OFF Below 1 V
      • If the result is not as specified, the ECU may have a malfunction.
  3. CHECK POWER TRUNK LID CONTROL ECU 
    Fig 3: Power Trunk Lid Control ECU Connector Terminal Identification
    GTY126259Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S43 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S43-11 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      S43-10 (ECUB) - S43-11 (GND) B - W-B Power supply Always 11 to 14 V
      S43-12 (B) - S43-11 (GND) G - W-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 S43 ECU connector.
    4. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S43-22 (LCTY) - S43-11 (GND) G - W-B Luggage compartment door courtesy light switch output Luggage compartment door open Pulse generation
      Luggage compartment door closed Below 1 V
      • If the result is not as specified, the ECU may have a malfunction.
    5. Using an oscilloscope, check the waveform.
      Fig 4: Identifying Waveform
      GTY132954Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM (REFERENCE)

      Item Content
      Terminal No. (Symbols) S43-22 (LCTY) - S43-11 (GND)
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Luggage compartment door open
  4. CHECK CERTIFICATION ECU 
    Fig 5: Identifying L15 And L16 Certification ECU Connector Terminals Identification
    GTY120067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L15 and L16 ECU connectors.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L15-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L15-1 (+B1) - L15-17 (E) L - W-B Battery power supply Always 11 to 14 V
      L15-18 (IG) - L15-17 (E) L - W-B IG power supply Power switch ON (IG) 11 to 14 V
      Power switch OFF Below 1 V
      L16-18 (BZR3) - L16-19 (BZRG) G - L Wireless door lock buzzer controller control signal Wireless door lock buzzer controller ON → OFF Below 12.8 kΩ → 12.8 kΩ or higher
      • If the result is not as specified, there may be a malfunction on the wire harness side.
    3. Reconnect the L15 and L16 ECU connectors.
    4. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L15-39 (RSSI) - L15-17 (E) W - W-B Door control receiver electric wave existence signal Power switch OFF, all doors closed, and transmitter switch not pressed 11 to 14 V
      Power switch OFF, all doors closed, and transmitter switch pressed Below 2 V
      L15-38 (RDA) - L15-17 (E) R - W-B Door control receiver data input signal Power switch OFF, all doors closed, and transmitter switch not pressed 11 to 14 V pulse generation at regular intervals
      Power switch OFF, all doors closed, and transmitter switch pressed Pulse generation
      L15-37 (ASEL) - L15-17 (E) L - W-B Door control receiver select signal Power switch OFF, all doors closed, and luggage compartment door closed Below 1 V
      Power switch OFF, all doors closed, and luggage compartment door open 4.6 to 5.4 V
      L15-29 (RC0) - L15-17 (E) G - W-B Door control receiver power source Power switch OFF, all doors closed, and transmitter switch pressed 4.6 to 5.4 V
      Power switch OFF, all doors closed, and transmitter switch not pressed Below 1 V
      • If the result is not as specified, the ECU may have a malfunction.
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