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Terminals Of Ecu

  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU) 
    Fig 1: Identifying Instrument Panel Junction Block (Main Body ECU) Connectors (1 Of 2)
    G05586129Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Identifying Instrument Panel Junction Block (Main Body ECU) Connectors (2 Of 2)
    G05586130Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E16 and IE junction block connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.
      ECU TERMINAL REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND1 (IE-17) - Body ground W-B - Body ground Ground Always Below 1 Ω
      AM1 (E16-1) - GND1 (IE-17) W - W-B Battery (power supply) Always 11 to 14 V

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

    3. Reconnect the E16 and IE junction block connectors.
    4. Measure the voltage of the wire harness side connectors.
    TERMINAL VOLTAGE REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    DCTY (IA-21) - Body ground W - Body ground Driver side door courtesy switch input Driver side door closed 11 to 14 V
    Driver side door open Below 1 V
    PCTY (IC-14) - Body ground BR - Body ground Passenger side door courtesy switch input Passenger side door closed 11 to 14 V
    Passenger side door open Below 1 V
    RRCY (ID-7) - Body ground LG - Body ground Rear RH door courtesy switch input Rear RH door closed 11 to 14 V
    Rear RH door open Below 1 V
    LCTY (E15-8) - Body ground SB - Body ground Rear LH door courtesy switch input Rear LH door closed 11 to 14 V
    Rear LH door open Below 1 V
    BCTY (IA-7) - Body ground LG - Body ground Back door courtesy switch input Back side door closed 11 to 14 V
    Back side door open Below 1 V
    L1 (IH-4) - Body ground P - Body ground Door lock motor LOCK drive output Master switch (door control switch) OFF Below 1 V
    Master switch (door control switch) ON (LOCK) 11 to 14 V → Below 1 V
    UL1 (IH-5) - Body ground B - Body ground Door lock motor UNLOCK drive output Master switch (door control switch) OFF Below 1 V
    Master switch (door control switch) ON (UNLOCK) 11 to 14 V → Below 1 V
    ACTD (E15-5) - Body ground B - Body ground Door lock motor UNLOCK drive output Master switch (door control switch) or driver side door key cylinder OFF Below 1 V
    Master switch (door control switch) or driver side door key cylinder ON (UNLOCK) 11 to 14 V → Below 1 V
    ACT+ (IH-8) - Body ground R - Body ground Door lock motor LOCK drive output Master switch (door control switch) or driver side door key cylinder OFF Below 1 V
    Master switch (door control switch) or driver side door key cylinder ON (LOCK) 11 to 14 V → Below 1 V
    ACT- (IH-18) - Body ground B - Body ground Door lock motor UNLOCK drive output Master switch (door control switch) or driver side door key cylinder OFF Below 1 V
    Master switch (door control switch) or driver side door key cylinder ON (UNLOCK) 11 to 14 V → Below 1 V
    LSWD (E15-25) - Body ground Y - Body ground Driver side door lock position switch input Driver side door UNLOCK Below 1 V
    Driver side door LOCK 11 to 14 V
    LSWP (E15-10) - Body ground Y - Body ground Passenger side door lock position switch input Passenger side door UNLOCK Below 1 V
    Passenger side door LOCK 11 to 14 V
    UL3 (E15-9) - Body ground LG - Body ground Door lock motor UNLOCK drive output Driver side door key cylinder OFF Below 1 V
    Driver side door key cylinder ON (UNLOCK) 11 to 14 V → Below 1 V
    12 (IH-7) - Body ground SB - Body ground Door lock motor LOCK drive output Master switch or driver side door key cylinder OFF Below 1 V
    Master switch or driver side door key cylinder ON (LOCK) 11 to 14 V → Below 1 V
    HAZ (IS-17) - Body ground GR - Body ground Hazard warning light signal Answer-back ON Pulse generation
    Answer-back OFF Below 1 V

    If the result is not as specified, the junction block (ECU) may have a malfunction.

  2. CHECK CERTIFICATION ECU 
    Fig 3: Identifying Certification ECU Connector
    G05999917Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E84 ECU connector.
    2. Measure the resistance and voltage of the wire harness side connector.
    TERMINAL RESISTANCE REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    E (E84-17) - Body ground W-B - Body ground Ground Always Below 1 Ω
    +B1 (E84-1) - Body ground R - Body ground +B power supply Always 11 to 14 V
    IG (E84-18) - Body ground B - Body ground IG power supply Engine switch on (IG) 11 to 14 V
    Engine switch off Below 1 V
    LIN (E84-10) - Body ground V - Body ground LIN line Always 10 kΩ or higher
    RSSI (E84-39) - Body ground R - Body ground Door control receiver output Engine switch off, all doors closed and transmitter switch not pressed → pressed 11 to 14 V → Below 1 V
    RDA (E84-38) - Body ground Y - Body ground Door control receiver input Engine switch off, all doors closed and transmitter switch not pressed → pressed Below 1 V → 11 to 14 V → Below 1 V
    RCO (E84-29) - Body ground V - Body ground Door control receiver input Engine switch off, all doors closed and transmitter switch not pressed → pressed 5 to Below 1V → 5V

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

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