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Terminals Of Ecu

  1. CHECK LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU) 
    Fig 1: Identifying Luggage Room Junction Block (Rear Junction Block ECU)
    G04944405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the LA, LO and LG junction block connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      LD-4 (MPXB) - Body ground R - Body ground Battery (ECU power source) Always 11 to 14 V
      LG-1 (BANC) - Body ground W - Body ground Battery (ECU power source) Always 11 to 14 V
      LA-43 (PGND) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the LA, LD and LG junction block connectors.
    4. Measure the voltage and resistance according to the value(s) in the table below.
    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    S61-8 (DBM-) - Body ground Y - Body ground Seat belt anchor motor power Shoulder belt anchorage switch off Below 1 V
    Shoulder belt anchorage switch down 11 to 14 V
    S61-10 (DBM+) - Body ground L - Body ground Seat belt anchor motor power Shoulder belt anchorage switch off Below 1 V
    Shoulder belt anchorage switch up 11 to 14 V
    S61-13 (E) - Body ground W - Body ground Ground Always Below 1 Ω
    S61-14 (BES) - Body ground R - Body ground Seat belt anchor motor power Seat belt anchor motor drive Alternating between approx. 8 V and 0 V
    Seat belt anchor motor stop Below 1 V
    S61-15 (VC) - Body ground Y - Body ground Battery (seat belt anchor power) Always 11 to 14 V
    S62-22 (PBM+) - Body ground V - Body ground Seat belt anchor motor power Shoulder belt anchorage switch off Below 1 V
    Shoulder belt anchorage switch up 11 to 14 V
    S62-23 (PBM-) - Body ground L - Body ground Seat belt anchor motor power Shoulder belt anchorage switch off Below 1 V
    Shoulder belt anchorage switch down 11 to 14 V

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

  2. CHECK FRONT DOOR ECU LH 
    Fig 2: Identifying Front Door ECU LH Connector
    G04944406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N10 and P10 ECU connectors.
    2. Measure the voltage and resistance according to the value (s) in the table below.
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      N10-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      P10-29 (MSWE) - N10-1 (GND) V-W-B Ground Always Below 1 Ω
      P10-28 (DSE) - N10-1 (GND) O - W-B Ground Always Below 1 Ω
      N10-11 (CPUB) - N10-1 (GND) B - W-B Battery (ECU power source) Always 11 to 14 V
      N10-6 (BDR) - N10-1 (GND) O - W-B Battery (ECU power source) Always 11 to 14 V
      N10-3 (SIG) - N10-1 (GND) L - W-B Engine switch signal Engine switch on (IG) 11 to 14 V
      P10-16 (MM) - N10-1 (GND) O - W-B Memory switch signal Memory switch set off 10 kΩ or higher
      Memory switch set on Below 1 Ω
      P10-13 (M1) - N10-1 (GND) R - W-B Memory switch signal Memory switch M1 off 10 kΩ or higher
      Memory switch M1 on Below 1 Ω
      P10-14 (M2) - N10-1 (GND) B - W-B Memory switch signal Memory switch M2 off 10 kΩ or higher
      Memory switch M2 on Below 1 Ω
      P10-15 (M3) - N10-1 (GND) Y - W-B Memory switch signal Memory switch M3 off 10 kΩ or higher
      Memory switch M3 on Below 1 Ω
      P10-17 (DSDN) - N10-1 (GND) R - W-B Seat belt anchorage switch signal Seat belt anchorage switch down off 10 kΩ or higher
      Seat belt anchorage switch down on Below 1 Ω
      P10-18 (DSUP) - N10-1 (GND) B - W-B Seat belt anchorage switch signal Seat belt anchorage switch up off 10 kΩ or higher
      Seat belt anchorage switch UP on Below 1 Ω

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

    3. Reconnect the M10 and P10 ECU connectors.
    4. Measure the voltage according to the value (s) in the table below.
    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    P10-16 (MM) - N10-1 (GND) O - W-B Memory switch signal Memory switch set off 11 to 14 V
    Memory switch set on Below 1 V
    P10-13 (M1) - N10-1 (GND) R - W-B Memory switch signal Memory switch M1 off 11 to 14 V
    Memory switch M1 on Below 1 V
    P10-14 (M2) - N10-1 (GND) B - W-B Memory switch signal Memory switch M2 off 11 to 14 V
    Memory switch M2 on Below 1 V
    P10-15 (M3) - N10-1 (GND) Y - W-B Memory switch signal Memory switch M3 off 11 to 14 V
    Memory switch M3 on Below 1 V
    P10-17 (DSDN) - N10-1 (GND) R - W-B Seat belt anchorage switch signal Seat belt anchorage switch down off 11 to 14 V
    Seat belt anchorage switch down on Below 1 V
    P10-18 (DSUP) - N10-1 (GND) B - W-B Seat belt anchorage switch signal Seat belt anchorage switch up off 11 to 14 V
    Seat belt anchorage switch up on Below 1 V

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

  3. CHECK FRONT DOOR ECU RH 
    Fig 3: Identifying Front Door ECU RH Connector
    G04944407Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N1 and P4 ECU connectors.
    2. Measure the voltage and resistance according to the value (s) in the table below.
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      N1-1 (GND) -Body ground W-B - Body ground Ground Always Below 1 Ω
      P4-28 (PSE) - N1-1 (GND) O - W-B Ground Always Below 1 Ω
      P4-11 (CPUB) - N1-1 (GND) R - W-B Battery (ECU power source) Always 11 to 14 V
      P4-6 (BDR) - N1-1 (GND) O - W-B Battery (ECU power source) Always 11 to 14 V
      P4-3 (SIG) - N1-1 (GND) V - W-B Engine switch signal Engine switch on (IG) 11 to 14 V
      P4-17 (PSDN) - N1-1 (GND) R-W-B Seat belt anchorage switch signal Seat belt anchorage switch down off 10 kΩ or higher
      Seat belt anchorage switch down on Below 1 Ω
      P4-18 (PSUP) - N1-1 (GND) B - W-B Seat belt anchorage switch signal Seat belt anchorage switch UP off 10 kΩ or higher
      Seat belt anchorage switch UP on Below 1 Ω

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

    3. Reconnect the N1 and P4 ECU connectors.
    4. Measure the voltage of the connectors.
    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    P4-17 (PSDN) - N1-1 (GND) R - W-B Seat belt anchorage switch signal Seat belt anchorage switch down off 11 to 14 V
    Seat belt anchorage switch down on Below 1 V
    P4-18 (PSUP) - N1-1 (GND) B - W-B Seat belt anchorage switch signal Seat belt anchorage switch UP off 11 to 14 V
    Seat belt anchorage switch UP on Below 1 V

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

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