POWER DOOR LOCK CONTROL SYSTEM(for Sedan) TERMINALS OF ECU


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


    1. Disconnect the MB main body ECU (multiplex network body ECU) connector.

      A01TCEWC01
      *A Main Body ECU (Multiplex Network Body ECU) with 1 Connector - -
      *1 Main Body ECU (Multiplex Network Body ECU) - -
      *a 1 Connector - -
      A01TD3KC67
      *A Main Body ECU (Multiplex Network Body ECU) with 2 Connectors - -
      *1 Main Body ECU (Multiplex Network Body ECU) - -
      *a 2 Connectors - -

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

      Tech Tips

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
      MB-30 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      MB-29 (ACC) - Body ground - ACC power supply Ignition switch ACC 11 to 14 V
      MB-29 (ACC) - Body ground - ACC power supply Ignition switch off Below 1 V
      MB-32 (IG) - Body ground - Ignition switch power supply Ignition switch ON 11 to 14 V
      MB-32 (IG) - Body ground - Ignition switch power supply Ignition switch off Below 1 V

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

    3. Reconnect the MB main body ECU (multiplex network body ECU) connector.

    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 SB - 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 SB - 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
      3C-5 (ACT-) - Body ground SB - 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
      3C-5 (ACT-) - Body ground SB - 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
      3E-2 (ACT-) - Body ground SB - 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-2 (ACT-) - Body ground SB - 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
      3C-4 (ACT-) - Body ground LG - 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
      3C-4 (ACT-) - Body ground LG - 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
      3C-13 (ACT+) - Body ground BE - 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
      3C-13 (ACT+) - Body ground BE - 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
      3C-14 (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
      3C-14 (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-8 (ACT+) - Body ground BE - 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-8 (ACT+) - Body ground BE - 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-9 (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-9 (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
      E22-19 (FRCY) - Body ground V - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V
      E22-19 (FRCY) - Body ground V - Body ground Front door courtesy light switch RH input Front door RH closed Pulse generation
      3E-25 (FLCY) - Body ground W - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V
      3E-25 (FLCY) - Body ground W - Body ground Front door courtesy light switch LH input Front door LH closed Pulse generation
      E22-24 (LCTY) - Body ground SB - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      E22-24 (LCTY) - Body ground SB - Body ground Rear door courtesy light switch LH input Rear door LH closed Pulse generation
      E22-6 (RCTY) - Body ground LG - Body ground Rear door courtesy light switch RH input Rear door RH open Below 1 V
      E22-6 (RCTY) - Body ground LG - Body ground Rear door courtesy light switch RH input Rear door RH closed Pulse generation
      E22-9 (L1) - Body ground L - Body ground Door control switch input Door control switch locked Below 1 V
      E22-9 (L1) - Body ground L - Body ground Door control switch input Door control switch off Pulse generation
      E22-10 (UL1) - Body ground Y - Body ground Door control switch input Door control switch unlocked Below 1 V
      E22-10 (UL1) - Body ground Y - Body ground Door control switch input Door control switch off Pulse generation
      E22-11 (L2) - Body ground SB - Body ground Driver door key-linked lock input Driver door key cylinder turned to lock position Below 1 V
      E22-11 (L2) - Body ground SB - Body ground Driver door key-linked lock input Driver door key cylinder off Pulse generation
      E22-12 (UL2) - Body ground P - Body ground Driver door key-linked unlock input Driver door key cylinder turned to unlock position Below 1 V
      E22-12 (UL2) - Body ground P - Body ground Driver door key-linked unlock input Driver door key cylinder off Pulse generation
      E22-7 (LSFL) - Body ground*1 Y - Body ground Front door LH unlock detection switch input Front door LH unlocked Below 1 V
      E22-7 (LSFL) - Body ground*1 Y - Body ground Front door LH unlock detection switch input Front door LH locked Pulse generation
      E22-18 (LSFR) - Body ground*2 LG - Body ground Front door RH unlock detection switch input Front door RH unlocked Below 1 V
      E22-18 (LSFR) - Body ground*2 LG - Body ground Front door RH unlock detection switch input Front door RH locked Pulse generation
      3E-22 (LSR) - Body ground*3 Y - Body ground Rear door RH unlock detection switch input Rear door RH or LH unlocked Below 1 V
      3E-22 (LSR) - Body ground*3 Y - Body ground Rear door RH unlock detection switch input Rear door RH and LH locked Pulse generation
      3E-37 (LSR) - Body ground*3 Y - Body ground Rear door LH unlock detection switch input Rear door LH or RH unlocked Below 1 V
      3E-37 (LSR) - Body ground*3 Y - Body ground Rear door LH unlock detection switch input Rear door LH and RH locked Pulse generation
      3E-34 (BCTY) - Body ground LG - Body ground Luggage compartment door courtesy light switch input Luggage compartment door open Below 1 V
      3E-34 (BCTY) - Body ground LG - Body ground Luggage compartment courtesy light switch input Luggage compartment door closed 11 to 14 V
      3E-39 (TR+) - Body ground P - Body ground Luggage compartment door lock motor unlock drive output Luggage door opening switch (open switch) pushed 11 to 14 V
      3E-39 (TR+) - Body ground P - Body ground Luggage compartment door lock motor unlock drive output Luggage door opening switch (open switch) not pushed Below 1 V
      E22-17 (KSW) - Body ground*4 V - Body ground Key unlock warning switch input No key in ignition key cylinder Pulse generation
      E22-17 (KSW) - Body ground*4 V - Body ground Key unlock warning switch input Key in ignition key cylinder Below 1 V

      • *1: for LHD or with Entry and Start System

      • *2: for RHD or with Entry and Start System

      • *3: w/ Entry and Start System

      • *4: w/o Entry and Start System

      If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may be malfunctioning.