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Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK MAIN BODY ECU 
    Fig 1: Identifying Connector Terminals Of ECU (Main Body Rear View)
    G04833190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Identifying Connector Terminals Of ECU (Main Body Front View)
    G04833191Courtesy 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 VOLTAGE 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 14V
      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
      PRG (D33-17) - Body ground W - Body ground Door control receiver output Transmitter switch ON --> OFF (No key in ignition key cylinder, all doors closed) 6 to 7 V --> Below 1 V --> 6 to 7V
      RDA (D33-16) - Body ground R - Body ground Door control receiver input Transmitter switch ON --> OFF (No key in ignition key cylinder, all doors closed) Below 1 V --> 6 to 7 V --> Below 1 V
      HAZ (4S-17) - Body ground B-Body ground Hazard warning light signal Answer-back ON Pulse generation
      HAZ (4S-17) - Body ground B-Body ground Hazard warning light signal Answer-back OFF 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.
  2. CHECK DOOR CONTROL RECEIVER 
    Fig 3: Identifying Door Control Receiver Connector Terminal
    G04833192Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the door control receiver connector.
    2. Measure the voltage and resistance of the wire harness side connectors.

      Standard: 

      CONNECTOR TERMINAL VOLTAGE SPECIFICATIONS

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B (J13-5) - GND (J13-1) L - W-B Battery (power supply) Always 11 to 14 V
      GND (J13-1) - 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 door control receiver connector.
    4. Measure the voltage of the wire harness side connectors.

      Standard voltage: 

      CONNECTOR TERMINAL VOLTAGE SPECIFICATIONS

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      PRG (J13-3) - Body ground W - Body ground Door control receiver output Transmitter switch ON --> OFF (No key in ignition key cylinder, all doors closed) 6 to 7 V --> Below 1 V --> 6 to 7 V
      RDA (J13-2) - Body ground R - Body ground Door control receiver input Transmitter switch ON --> OFF (No key in ignition key cylinder, all doors closed) Below 1 V --> 6 to 7 V --> Below 1 V

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

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