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Terminals Of Ecu

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  1. CHECK MAIN BODY ECU 
    Fig 1: Identifying Connector Terminals Of ECU
    G04833148Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Identifying Connector Terminals Of ECU
    G04833149Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 4B and 4E main body ECU (vehicle rear side) connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.

      Standard: 

      CONNECTOR TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BECU (4B-30)-GND1 (4E-17) L-W-B Battery (power supply) Always 11 to 14 V
      GND1 (4E-17)-Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the main body ECU (vehicle rear side) connectors.
    4. Measure the voltage of the wire harness side connectors.

      Standard voltage: 

      CONNECTOR TERMINAL VOLTAGE REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      KSW (4D-7) - GND1 (4E-17) Y-W-B Key unlock warning switch input Key inserted 0V
      KSW (4D-7) - GND1 (4E-17) Y-W-B Key unlock warning switch input No key in ignition key cylinder 11 to 14 V
      DCTY(4A-21)-Body ground R - Body ground Driver side door courtesy switch input Driver side door closed 11 to 14 V
      DCTY(4A-21)-Body ground R - Body ground Driver side door courtesy switch input Driver side door open 0V
      PCTY (4A-24) - Body ground L - Body ground Passenger side door courtesy switch input Passenger side door closed 11 to 14 V
      PCTY (4A-24) - Body ground L - Body ground Passenger side door courtesy switch input Passenger side door open 0V
      RRCY (4A-20) - Body ground(3) L - Body ground Rear RH door courtesy switch input Rear RH door closed 11 to 14 V
      RRCY (4A-20) - Body ground(3) L - Body ground Rear RH door courtesy switch input Rear RH door open 0V
      RRCY (4A-5) - Body ground(3) G - Body ground Rear LH door courtesy switch input Rear LH door closed 11 to 14 V
      RRCY (4A-5) - Body ground(3) G - Body ground Rear LH door courtesy switch input Rear LH door open 0V
      RRCY (4A-5) - Body ground(4) Y - Body ground Rear LH and RH door courtesy switch input Rear LH and RH door closed 11 to 14 V
      RRCY (4A-5) - Body ground(4) Y - Body ground Rear LH and RH door courtesy switch input Rear LH and RH door open 0V
      BCTY (4A-7) - Body ground(1) SB-Body ground Back door courtesy switch input Back side door closed 11 to 14 V
      BCTY (4A-7) - Body ground(1) SB-Body ground Back door courtesy switch input Back side door open 0V
      LGCY (4A-7) - Body ground(2) SB-Body ground Luggage room courtesy switch input Luggage room closed 11 to 14 V
      LGCY (4A-7) - Body ground(2) SB-Body ground Luggage room courtesy switch input Luggage room open 0V
      L1 (4H-4) - Body ground LG - Body ground Door control switch lock input Door control switch OFF 11 to 14 V
      L1 (4H-4) - Body ground LG - Body ground Door control switch lock input Door control switch ON (LOCK) 0V
      UL1 (4H-5) - Body ground O - Body ground Door control switch unlock input Door control switch OFF 11 to 14 V
      UL1 (4H-5) - Body ground O - Body ground Door control switch unlock input Door control switch ON (UNLOCK) 0V
      ACTD (D33-2) - Body ground SB - Body ground Door lock motor UNLOCK drive output Door control switch or driver side door key cylinder OFF 0V
      ACTD (D33-2) - Body ground SB - Body ground Door lock motor UNLOCK drive output Door control switch or driver side door key cylinder ON (UNLOCK) 11 to 14 V --> 0V
      ACT+ (4H-8) - Body ground O - Body ground Door lock motor LOCK drive output Door control switch or driver side door key cylinder OFF 0V
      ACT+ (4H-8) - Body ground 0 - Body ground Door lock motor LOCK drive output Door control switch or driver side door key cylinder ON (LOCK) 11 to 14 V --> 0V
      ACT+ (4A-3) - Body ground GR - Body ground Door lock motor LOCK drive output Door control switch or driver side door key cylinder OFF 0V
      ACT+ (4A-3) - Body ground GR - Body ground Door lock motor LOCK drive output Door control switch or driver side door key cylinder ON (LOCK) 11 to 14 V --> 0V
      ACT+(4H-17)-Body ground W - Body ground Door lock motor LOCK drive output Door control switch or driver side door key cylinder OFF 0V
      ACT+(4H-17)-Body ground W - Body ground Door lock motor LOCK drive output Door control switch or driver side door key cylinder ON (LOCK) 11 to 14 V --> 0V
      ACT-(4H-18)-Body ground P - Body ground Door lock motor UNLOCK drive output Door control switch or driver side door key cylinder OFF 0V
      ACT- (4H-18)- Body ground P - Body ground Door lock motor UNLOCK drive output Door control switch or driver side door key cylinder ON (UNLOCK) 11 to 14 V --> 0V
      ACT- (4A-4) - Body ground P - Body ground Door lock motor UNLOCK drive output Door control switch or driver side door key cylinder OFF 0V
      ACT- (4A-4) - Body ground P - Body ground Door lock motor UNLOCK drive output Door control switch or driver side door key cylinder ON (UNLOCK) 11 to 14 V --> 0V
      LSWD (D33-21)-Body ground L - Body ground Driver side door lock position switch input Driver side door UNLOCK 0V
      LSWD (D33-21)-Body ground L - Body ground Driver side door lock position switch input Driver side door LOCK 11 to 14 V
      LSWP (D33-5) - Body ground L - Body ground Passenger side door lock position switch input Passenger side door UNLOCK 0V
      LSWP (D33-5) - Body ground L - Body ground Passenger side door lock position switch input Passenger side door LOCK 11 to 14 V
      LSR (D33-24) - Body ground O - Body ground Rear LH or rear RH door lock position switch input Rear LH or rear RH door UNLOCK 0V
      LSR (D33-24) - Body ground O - Body ground Rear LH or rear RH door lock position switch input Rear LH or rear RH door LOCK 11 to 14 V
      UL3 (D33-14)-Body ground Y - Body ground Door lock motor UNLOCK drive output Driver side door key cylinder OFF 11 to 14 V
      UL3 (D33-14)-Body ground Y - Body ground Door lock motor UNLOCK drive output Driver side door key cylinder ON (UNLOCK) 0V
      UL2 (4H-15)-Body ground G - Body ground Door lock motor UNLOCK drive output Passenger side door key cylinder OFF 11 to 14 V
      UL2 (4H-15)-Body ground G - Body ground Door lock motor UNLOCK drive output Passenger side door key cylinder ON (UNLOCK) 0V
      L2 (4H-16)- Body ground O - Body ground Door lock motor LOCK drive output Door control switch or driver side door key cylinder OFF 0V
      L2 (4H-16)- Body ground O - Body ground Door lock motor LOCK drive output Door control switch or driver side door key cylinder ON (LOCK) 11 to 14 V
      (1) Hatchback
      (2) Sedan
      (3) Hatchback, Sedan except *5
      (4) Sedan *5

      *5: Cold area specification, w/ Engine immobilizer system, w/ ABS, w/ Rear window defogger, w/ Power door lock system, w/ Daytime running light, w/ Remote control mirror, w/ Air conditioning If the result is not as specified, there may be a malfunction in the wire harness.
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