WIRELESS DOOR LOCK CONTROL SYSTEM(w/o Entry and Start System) TERMINALS OF ECU

  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    C278789N02
    C278790C04

    *A

    Main Body ECU (Multiplex Network Body ECU) with 1 connector

    *B

    Main Body ECU (Multiplex Network Body ECU) with 3 connectors

    *1

    Main Body ECU (Multiplex Network Body ECU)

    -

    -

    1. Remove the main body ECU (Multiplex network body ECU) from the instrument panel junction block assembly.

      for LHD:Click here

      for RHD:Click here

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Tip:

      Measure the values on the wire harness side with the connectors disconnected.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      A-11 (GND1) - Body ground

      -

      Ground

      Always

      Below 1 Ω

      A-30 (BECU) - Body ground

      -

      Battery power supply

      Always

      11 to 14 V

      A-29 (ACC) - Body ground

      -

      ACC power supply

      Ignition switch ACC

      11 to 14 V

      A-29 (ACC) - Body ground

      -

      ACC power supply

      Ignition switch off

      Below 1 V

      A-32 (IG) - Body ground

      -

      Ignition power supply

      Ignition switch ON

      11 to 14 V*1

      10.5 to 14 V*2

      A-32 (IG) - Body ground

      -

      Ignition power supply

      Ignition switch off

      Below 1 V

      *1: w/o Stop and Start System

      *2: w/ Stop and Start System

    3. Install the main body ECU (multiplex network body ECU).

      for LHD:Click here

      for RHD:Click here

    4. Measure the voltage and check for pulses according to the value(s) in the table below.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      3E-1 (ACT-) - Body ground

      BR - Body ground

      Door lock motor unlock drive output (all door)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder off

      Below 1 V

      3E-1 (ACT-) - Body ground

      BR - Body ground

      Door lock motor unlock drive output (all door)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder unlocked

      11 to 14 V

      3D-5 (ACT-) - Body ground

      B - Body ground

      Door lock motor unlock drive output (all door)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder off

      Below 1 V

      3D-5 (ACT-) - Body ground

      B - Body ground

      Door lock motor unlock drive output (all door)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder unlocked

      11 to 14 V

      3D-4 (ACT-) - Body ground

      B - Body ground

      Door lock motor unlock drive output (all door)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder off

      Below 1 V

      3D-4 (ACT-) - Body ground

      B - Body ground

      Door lock motor unlock drive output (all door)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder unlocked

      11 to 14 V

      3D-3 (ACT-) - Body ground

      B - Body ground

      Door lock motor unlock drive output (all door)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder off

      Below 1 V

      3D-3 (ACT-) - Body ground

      B - Body ground

      Door lock motor unlock drive output (all door)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder unlocked

      11 to 14 V

      3D-13 (ACT+) - Body ground

      R - Body ground

      Door lock motor lock drive output (all doors)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder locked

      11 to 14 V

      3D-13 (ACT+) - Body ground

      R - Body ground

      Door lock motor lock drive output (all doors)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder off

      Below 1 V

      3D-11 (ACT+) - Body ground

      R - Body ground

      Door lock motor lock drive output (all doors)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder locked

      11 to 14 V

      3D-11 (ACT+) - Body ground

      R - Body ground

      Door lock motor lock drive output (all doors)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder off

      Below 1 V

      3D-12 (ACT+) - Body ground

      R - Body ground

      Door lock motor lock drive output (all doors)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder locked

      11 to 14 V

      3D-12 (ACT+) - Body ground

      R - Body ground

      Door lock motor lock drive output (all doors)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder off

      Below 1 V

      3E-17 (ACT+) - Body ground

      R - Body ground

      Door lock motor lock drive output (all doors)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder locked

      Below 1 V

      3E-17 (ACT+) - Body ground

      R - Body ground

      Door lock motor lock drive output (all doors)

      Door control switch (power window regulator master switch assembly) or driver door key cylinder locked

      11 to 14 V

      3E-40 (FLCY) - Body ground

      W - Body ground

      Front door LH courtesy light switch input

      Front door LH open

      Below 1 V

      3E-40 (FLCY) - Body ground

      W - Body ground

      Front door LH courtesy light switch input

      Front door LH closed

      Pulse generation

      G78-19 (FRCY) - Body ground

      L - Body ground

      Front door RH courtesy light switch input

      Front door RH open

      Below 1 V

      G78-19 (FRCY) - Body ground

      L - Body ground

      Front door RH courtesy light switch input

      Front door RH closed

      Pulse generation

      G78-24 (LCTY) - Body ground

      W - Body ground*2

      SB - Body ground*3

      Rear door LH courtesy light switch input

      Rear door LH open

      Below 1 V

      G78-24 (LCTY) - Body ground

      W - Body ground*2

      SB - Body ground*3

      Rear door LH courtesy light switch input

      Rear door LH closed

      Pulse generation

      G78-6 (RCTY) - Body ground

      Y - Body ground

      Rear door RH courtesy light switch input

      Rear door RH open

      Below 1 V

      G78-6 (RCTY) - Body ground

      Y - Body ground

      Rear door RH courtesy light switch input

      Rear door RH closed

      Pulse generation

      G78-7 (LSFL) - Body ground

      B - Body ground

      Front door LH unlock detection switch input

      Front door LH unlocked

      Below 1 V

      G78-7 (LSFL) - Body ground

      B - Body ground

      Front door LH unlock detection switch input

      Front door LH locked

      Pulse generation

      G78-18 (LSFR) - Body ground

      P - Body ground

      Front door RH unlock detection switch input

      Front door RH unlocked

      Below 1 V

      G78-18 (LSFR) - Body ground

      P - Body ground

      Front door RH unlock detection switch input

      Front door RH locked

      Pulse generation

      3E-32 (LSR) - Body ground*1

      Y - Body ground

      Rear door RH unlock detection switch input

      Rear door RH or LH unlocked

      Below 1 V

      3E-32 (LSR) - Body ground*1

      Y - Body ground

      Rear door RH unlock detection switch input

      Rear door RH and LH locked

      Pulse generation

      3C-41 (LSR) - Body ground*1

      Y - Body ground

      Rear door LH unlock detection switch input

      Rear door LH or RH unlocked

      Below 1 V

      3C-41 (LSR) - Body ground*1

      Y - Body ground

      Rear door LH unlock detection switch input

      Rear door LH and RH locked

      Pulse generation

      G78-4 (PRG) - Body ground

      W - Body ground

      Signal output to door control receiver

      Key inserted into ignition key cylinder → Key pulled out of ignition key cylinder

      11 to 14 V → Pulse generation → 11 to 14 V

      G78-16 (RDA) - Body ground

      SB - Body ground

      Signal input from door control receiver

      Ignition switch off, all doors closed and door control transmitter assembly switch not pressed

      11 to 14 V

      Ignition switch off, all doors closed and door control transmitter assembly switch pressed

      Pulse generation

      (0 to 12 V)

      G78-17 (KSW) - Body ground

      R - Body ground

      Key unlock warning switch input

      No key in ignition key cylinder

      Pulse generation

      G78-17 (KSW) - Body ground

      R - Body ground

      Key unlock warning switch input

      Key in ignition key cylinder

      Below 1 V

      *1: w/ Theft Deterrent System or Double Locking System

      *2: for LHD

      *3: for RHD

  2. CHECK DOOR CONTROL RECEIVER

    1. Disconnect the M10 door control receiver connector.

      B280754N14

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Tip:

      Measure the values on the wire harness side with the connectors disconnected.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      M10-5 (DATA) - Body ground

      Y - Body ground

      Battery power supply

      Always

      11 to 14 V

      M10-1 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

    3. Reconnect the M10 door control receiver connector.

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      M10-3 (PRG) - M10-1 (GND)

      Y - W-B

      Signal input from main body ECU (multiplex network body ECU)

      Key inserted into ignition key cylinder → Key pulled out of ignition key cylinder

      11 to 14 V → Pulse generation → 11 to 14 V

      M10-2 (CSEL) - M10-1 (GND)

      R - W-B

      Signal output to main body ECU (multiplex network body ECU)

      Ignition switch off, all doors closed and door control transmitter assembly switch not pressed

      11 to 14 V

      Ignition switch off, all doors closed and door control transmitter assembly switch pressed

      Pulse generation

      (0 to 12 V)