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Terminals Of Ecu

  1. CHECK COWL SIDE JUNCTION BLOCK RH (MULTIPLEX NETWORK BODY ECU) 
    Fig 1: Identifying Cowl Side Junction Block RH (Multiplex Network Body ECU)
    G04021873Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DA, DD and DK J/B connectors.
    2. Disconnect the U1 ECU connector.
    3. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BECU (DK-5) - GND2 (DA-5) G-R - W-B BECU power supply Always 10 to 14 V
      GND2 (DA-5) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND2 (DD-7) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DCTY (U1-14) - Body ground R - Body ground Driver side door courtesy light switch signal Driver side door is closed Below 1 Ω
      DCTY (U1-14) - Body ground R - Body ground Driver side door courtesy light switch signal Driver side door is open 10 kΩ or higher

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

  2. CHECK FRONT MULTIPLEX NETWORK DOOR ECU LH 
    Fig 2: Identifying Front Multiplex Network Door ECU LH Connector
    G04021874Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N3 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (N3-4) - GND (N3- 1) LG - W-B Battery power supply Always 10 to 14 V
      BDR (N3-6) - GND (N3-1) L - W-B Battery power supply Always 10 to 14 V
      SIG (N3-3) - GND (N3-1) Y - W-B SIG power supply Engine switch on (IG) 10 to 14 V
      SIG (N3-3) - GND (N3-1) Y - W-B SIG power supply Engine switch off Below 1 V
      GND (N3-1) - 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 N3 ECU connector.
    4. Measure the voltage of the connector.
      VOLTAGE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      A- (N4-1) - GND (N3-1) R - W-B Door lock motor LOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder UNLOCK 10 to 14 V
      A- (N4-1) - GND (N3-1) R - W-B Door lock motor LOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder LOCK Below 1 V
      A+ (N4-2) - GND (N3-1) G - W-B Door lock motor UNLOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder LOCK 10 to 14 V
      A+ (N4-2) - GND (N3-1) G - W-B Door lock motor UNLOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder UNLOCK Below 1 V

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

  3. CHECK FRONT MULTIPLEX NETWORK DOOR ECU RH 
    Fig 3: Identifying Front Multiplex Network Door ECU RH Connector
    G04021875Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M3 and M4 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (M4-4) - GND (M4- 1) LG - W-B Battery power supply Always 10 to 14 V
      BDR (M4-6) - GND (M4-1) L - W-B Battery power supply Always 10 to 14 V
      SIG (M4-3) - GND (M4-1) L - W-B SIG power supply Engine switch on (IG)> 10 to 14 V
      SIG (M4-3) - GND (M4-1) L - W-B SIG power supply Engine switch off Below 1 V
      GND (M4-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      LSW (M3-14) - LSWE(M3- 13) G - LG Passenger side door lock position switch input Passenger side door UNLOCK Below 1 Ω
      LSW (M3-14) - LSWE(M3- 13) G - LG Passenger side door lock position switch input Passenger side door LOCK 10 kΩ or higher

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

    3. Reconnect the M3 and M4 ECU connectors.
    4. Measure the voltage of the connectors.
      VOLTAGE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      A- (M3-1) - GND (M4-1) R - W-B Door lock motor LOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder UNLOCK 10 to 14 V
      A- (M3-1) - GND (M4-1) R - W-B Door lock motor LOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder LOCK Below 1 V
      A+ (M3-2) - GND (M4-1) G - W-B Door lock motor UNLOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder LOCK 10 to 14 V
      A+ (M3-2) - GND (M4-1) G - W-B Door lock motor UNLOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder UNLOCK Below 1 V
      PML (M3-22) - GND (M4- 1) L - W-B Door control switch signal input Door control switch UNLOCK Below 1 V
      PML (M3-22) - GND (M4- 1) L - W-B Door control switch signal input Door control switch LOCK 10 to 14 V
      PMUL (M3-23) - GND (M4-1) G - W-B Door control switch signal input Door control switch LOCK Below 1 V
      PMUL (M3-23) - GND (M4-1) G - W-B Door control switch signal input Door control switch UNLOCK 10 to 14 V

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

  4. CHECK REAR MULTIPLEX NETWORK DOOR ECU LH 
    Fig 4: Identifying Rear Multiplex Network Door ECU LH Connector
    G04021876Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P2 and P3 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (P2-4) - GND (P2- 1) BR - W-B Battery power supply Always 10 to 14 V
      BDR (P2-6) - GND (P2-1) L - W-B Battery power supply Always 10 to 14 V
      SIG (P2-3) - GND (P2-1) G - W-B SIG power supply Engine switch on (IG) 10 to 14 V
      SIG (P2-3) - GND (P2-1) G - W-B SIG power supply Engine switch off Below 1 V
      GND (P2-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      LSW (P3-14) - LSWE (P3- 13) LG - W-B Rear door side LH door lock position switch input Rear door side LH door is UNLOCK Below 1 Ω
      LSW (P3-14) - LSWE (P3- 13) LG - W-B Rear door side LH door lock position switch input Rear door side LH door is LOCK 10 kΩ or higher

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

    3. Reconnect the P2 and P3 ECU connectors.
    4. Measure the voltage of the connectors.
      VOLTAGE REFERENCE

      Symbols (Tester No.) Wiring Color Terminal Description Condition Specified Condition
      A- (P3-1) - GND (P2-1) G - W-B Door lock motor LOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder UNLOCK 10 to 14 V
      A- (P3-1) - GND (P2-1) G - W-B Door lock motor LOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder LOCK Below 1 V
      A+ (P3-2) - GND (P2-1) O - W-B Door lock motor UNLOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder LOCK 10 to 14 V
      A+ (P3-2) - GND (P2-1) O - W-B Door lock motor UNLOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder UNLOCK Below 1 V

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

  5. CHECK REAR MULTIPLEX NETWORK DOOR ECU RH 
    Fig 5: Identifying Rear Multiplex Network Door ECU RH Connector
    G04021877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the O2 and O3 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Tester No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (O3-4) - GND (O3- 1) G - W-B Battery power supply Always 10 to 14 V
      BDR (O3-6) - GND (O3-1) L - W-B Battery power supply Always 10 to 14 V
      SIG (O3-3) - GND (O3-1) L - W-B SIG power supply Engine switch on (IG) 10 to 14 V
      SIG (O3-3) - GND (O3-1) L - W-B SIG power supply Engine switch off Below 1 V
      GND (O3-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      LSW (O2-14) - LSWE(O2- 13) LG - W-B Rear door side RH door lock position switch input Rear door side RH door UNLOCK Below 1 Ω
      LSW (O2-14) - LSWE(O2- 13) LG - W-B Rear door side RH door lock position switch input Rear door side RH door UNLOCK 10 kΩ or higher

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

    3. Reconnect the O2 and O3 ECU connectors.
    4. Measure the voltage of the connectors.
      VOLTAGE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      A- (O2-1) - GND (O3-1) G - W-B Door lock motor LOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder UNLOCK 10 to 14 V
      A- (O2-1) - GND (O3-1) G - W-B Door lock motor LOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder LOCK Below 1 V
      A+ (O2-2) - GND (O3-1) O - W-B Door lock motor UNLOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder LOCK 10 to 14 V
      A+ (O2-2) - GND (O3-1) O - W-B Door lock motor UNLOCK drive output Door control switch (master switch or passenger side door control switch) or driver side door key cylinder UNLOCK Below 1 V

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

  6. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 
    Fig 6: Identifying Multiplex Network Master Switch Assembly Connector
    G04021878Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R5 switch connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (R5-9) - E (R5-2) G - W-B Battery power supply Always 10 to 14 V
      BDR1 (R5-10) - E (R5-2) Y - W-B Battery power supply Always 10 to 14 V
      SIG (R5-20) - E (R5-2) V - W-B SIG power supply Engine switch on (IG) 10 to 14 V
      SIG (R5-20) - E (R5-2) V - W-B SIG power supply Engine switch off Below 1 V
      E (R5-20) - Body ground W-B - Body ground Ground Always Below 1 Ω
      KL (R5-4) - E (R5-2) LG - W-B Door key-linked door lock input Using key, operate driver door lock cylinder LOCK Below 1 Ω
      KL (R5-4) - E (R5-2) LG - W-B Door key-linked door lock input Using key, operate driver door lock cylinder UNLOCK 10 kΩ or higher
      KUL (R5-14) - E (R5-2) P - W-B Door key-linked door unlock input Using key, operate driver door lock cylinder LOCK Below 1 Ω
      KUL (R5-14) - E (R5-2) P - W-B Door key-linked door unlock input Using key, operate driver door lock cylinder UNLOCK 10 kΩ or higher
      LSW (R5-16) - E (R5-2) Y - W-B Driver side door lock position switch input Driver side door is unlocked Below 1 Ω
      LSW (R5-16) - E (R5-2) Y - W-B Driver side door lock position switch input Driver side door is locked 10 kΩ or higher

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

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