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Terminals Of Ecu

  1. CHECK MAIN BODY ECU (INSTRUMENT PANEL J/B) 
    1. Disconnect the main body ECU (instrument panel J/ B) connectors.
      Fig 1: Identifying Main Body ECU Connector Terminals (Instrument Panel Junction Block)
      G05252063Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.
      ECU TERMINALS REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND3 (E59-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      RCTY (E60-7) - Body ground GR - Body ground Rear courtesy light switch RH input Rear door RH CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      PCTY (E60-21) - Body ground G - Body ground Passenger side courtesy light switch input Passenger side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      LGCY (E60-25) - Body ground W - Body ground Luggage compartment door courtesy light switch input Luggage compartment door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      DCTY (E61-24) - Body ground GR - Body ground Driver side door courtesy light switch input Driver side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      ACC (DA-1) - Body ground W - Body ground Ignition power supply (ACC signal) Engine switch on (ACC) → off 10 to 14 V → Below 1 V
      IG (DA-1) - Body ground W- Body ground Ignition power supply (IG signal) Engine switch on (IG) → off 10 to 14 V → Below 1 V
      BATB (DA-1) - Body ground W - Body ground +B (power battery system) power supply Always 10 to 14 V
      ALTB (DD-16) - Body ground W - Body ground +B (power system alternator system) power supply Always 10 to 14 V
      GND1 (DF-10) - Body ground W-B - Body ground Ground Always Below 1 Ω
      LCTY (DO-7) - Body ground B - Body ground Rear courtesy light switch LH input Rear door LH CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω

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

    3. Reconnect the main body (instrument panel J/B) connectors.
    4. Measure the voltage between each terminal of the wire harness side connectors and body ground.
      ECU TERMINALS REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      HAZ (E59-4) - Body ground W - Body ground Turn signal flasher relay signal Any transmitter switch is pressed → not pressed Below 1 V → 10 to 14 V*1
      TR+ (E61-1) - Body ground B - Body ground Luggage compartment door opener motor input Luggage compartment door CLOSED (LOCKED) → OPEN (UNLOCKED) Below 1 V → 10 to 14 V*2
      HINT:
      *1: When operating the answer back function.
      *2: When operating the motor.
  2. CHECK CERTIFICATION ECU ASSEMBLY 
    1. Disconnect the E13 ECU connector.
      Fig 2: Identifying Certification ECU Assembly Connector Terminals
      G05252709Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance of the wire harness side connector.
      ECU TERMINALS REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B1 (E13-1) - E (E13-17) W - W-B Battery power supply Always 10 to 14 V
      E (E13-17) - Body ground W-B - Body ground Ground Always Below 1 Ω
      IG (E13-18) - E (E13-17) B - W-B IG power supply Engine switch on (IG) 10 to 14 V
      IG (E13-18) - E (E13-17) B - W-B IG power supply Engine switch off Below 1 V

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

    3. Reconnect the E13 ECU connector.
    4. Measure the voltage of the connector.
      ECU TERMINALS REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BZR (E13-21) - Body ground O - Body ground Wireless door lock buzzer Wireless door lock buzzer OFF → ON 0 V → Pulse generation
      RC0 (E13-29) - E (E13-17) G - W-B Door control receiver power supply Engine switch off, all doors closed and transmitter switch not pressed Below 1 V
      RC0 (E13-29) - E (E13-17) G - W-B Door control receiver power supply Engine switch off, all doors closed and transmitter switch pressed 4.6 to 5.4 V
      RDA (E13-38) - E (E13-17) Y - W-B Door control receiver output signal Engine switch off, all doors closed and transmitter switch not pressed 10 to 14 V
      RDA (E13-38) - E (E13-17) Y - W-B Door control receiver output signal Engine switch off, all doors closed and transmitter switch pressed Pulse generation

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

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