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Terminals Of Ecu

  1. CHECK MAIN BODY ECU RH (COWL SIDE J/B RH) 
    1. Disconnect the main body ECU RH (cowl side J/B RH) connectors.
      Fig 1: Identifying Main Body ECU RH (Cowl Side J/B RH) Connector Terminals
      G05320639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance and voltage of the wire harness side connectors.
      MAIN BODY ECU RH (COWL SIDE J/B RH) DISCONNECT

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      PCTY (J75-23) - Body ground B - Body ground Passenger side courtesy light switch Input Passenger side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      LGCY (J75-25) - Body ground L - Body ground Luggage compartment door courtesy light switch input Luggage compartment door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below
      DCTY (P1-14) - Body ground W - Body ground Driver side door courtesy light switch input Driver side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      RCTY (P1-16) - Body ground O - Body ground Rear courtesy light switch RH input Rear door RH CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      GND2 (RA-11) - Body ground BR - Body ground Ground Always Below 1 Ω
      LCTY (RA-11) - Body ground R - Body ground Rear courtesy light switch LH input Rear door LH CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      ALTB (RM-1) - Body ground B - Body ground +B (power generator system) power supply Always 10 to 14 V
      GND2 (RD-7) - Body ground W-B - Body ground Ground Always Below 1 Ω
      BECU (RK-5) - Body ground G-R - Body ground +B power supply Always 10 to 14 V
      ACC (RM-1) - Body ground B - Body ground Ignition power supply (ACC signal) Engine switch on (ACC) → off 10 to 14 V → Below 1 V
      IG (RM-1) - Body ground B - Body ground Ignition power supply (IG signal) Engine switch on (IG) → off 10 to 14 V → Below 1 V
      BATB (RN-1) - Body ground R - Body ground +B (power battery system) power supply Always 10 to 14 V

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

    3. Reconnect the main body ECU RH (cowl side J/B RH) connectors.
    4. Measure the resistance and voltage of the wire harness side connectors.
      MAIN BODY ECU RH (COWL SIDE J/B RH) RECONNECT

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SH (A36-1) - Body ground W- Body ground Security horn drive Answer back security horn is not sounding → Sounding Below 1 V → 10 to 14 V
      BZR (A36-2) - Body ground G - Body ground Wireless door lock buzzer Wireless door lock buzzer OFF → ON 0 V → Pulse generation
      TR+ (J74-1) - Body ground P - Body ground Luggage compartment door opener motor input Luggage compartment door CLOSED (LOCKED) → OPEN (UNLOCKED) Below 1 V → 10 to 14 V
      HAZ (J74-2) - Body ground Y - Body ground Turn signal flasher relay signal Any transmitter switch is pressed → not pressed Below 1 V → 10 to 14 V
  2. CHECK CERTIFICATION ECU ASSEMBLY 
    Fig 2: Identifying E58 ECU Connector Terminal
    G05320640Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P33 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      CERTIFICATION ECU ASSEMBLY DISCONNECT

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B1 (P33-1) - E (P33-17) L - W-B Battery power supply Always 10 to 14 V
      E (P33-17) - Body ground W-B - Body ground Ground Always Below 1 Ω
      IG (P33-18) - E (P33-17) B - W-B IG power supply Engine switch on (IG) 10 to 14 V
      IG (P33-18) - E (P33-17) 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 P33 ECU connector.
    4. Measure the voltage of the connector.
      CERTIFICATION ECU ASSEMBLY RECONNECT

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      RC0 (P33-29) - E (P33-17) Y - W-B Door control receiver power supply Engine switch off, all doors closed and transmitter switch not pressed Below 1 V
      RC0 (P33-29) - E (P33-17) Y - W-B Door control receiver power supply Engine switch off, all doors closed and transmitter switch pressed 4.6 to 5.4 V
      RDA (P33-38) - E (P33-17) R - W-B Door control receiver output signal Engine switch off, all doors closed and transmitter switch not pressed 10 to 14 V
      RDA (P33-38) - E (P33-17) R - 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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