POWER DOOR LOCK CONTROL SYSTEM TERMINALS OF ECU


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

    A01EWY1E21
    Text in Illustration
    *A for LHD *B for RHD

    1. Disconnect the MB and I12 main body ECU (multiplex network body ECU) 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
      I12-3 (GND2) - Body ground W-B - 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-31 (ALTB) - Body ground - Battery power supply Always 11 to 14 V
      MB-32 (IG) - Body ground - IG power supply Ignition switch ON 11 to 14 V
      MB-32 (IG) - Body ground - IG 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 and I12 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
      3A-45 (GSW) - Body ground B - Body ground Airbag sensor signal (collision detection signal) ignition switch ON with airbag sensor assembly connector disconnected 2.8 to 4.3 V
      3B-8 (ACT-) - Body ground

      V - Body ground*1

      GR - Body ground*2

      		 Door lock motor unlock drive output (except driver door) Door control switch (multiplex network master switch) or driver door key cylinder off Below 1 V
      3B-8 (ACT-) - Body ground

      V - Body ground*1

      GR - Body ground*2

      		 Door lock motor unlock drive output (except driver door) Door control switch (multiplex network master switch) or driver door key cylinder unlocked 11 to 14 V
      3B-3 (ACT+) - Body ground W - Body ground Door lock motor lock drive output (all doors) Door control switch (multiplex network master switch) or driver door key cylinder off Below 1 V
      3B-3 (ACT+) - Body ground W - Body ground Door lock motor lock drive output (all doors) Door control switch (multiplex network master switch) or driver door key cylinder locked 11 to 14 V
      3B-4 (ACTD) - Body ground

      GR - Body ground*1

      V - Body ground*2

      		 Driver door lock motor unlock drive output Door control switch (multiplex network master switch) or driver door key cylinder off Below 1 V
      3B-4 (ACTD) - Body ground

      GR - Body ground*1

      V - Body ground*2

      		 Driver door lock motor unlock drive output Door control switch (multiplex network master switch) or driver door key cylinder unlocked 11 to 14 V
      I13-19 (FRCY) - Body ground Y - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V
      I13-19 (FRCY) - Body ground Y - Body ground Front door courtesy light switch RH input Front door RH closed 11 to 14 V
      3C-15 (FLCY) - Body ground L - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V
      3C-15 (FLCY) - Body ground L - Body ground Front door courtesy light switch LH input Front door LH closed 11 to 14 V
      I13-1 (LCTY) - Body ground P - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      I13-1 (LCTY) - Body ground P - Body ground Rear door courtesy light switch LH input Rear door LH closed Pulse generation
      I13-6 (RCTY) - Body ground B - Body ground Rear door courtesy light switch RH input Rear door RH open Below 1 V
      I13-6 (RCTY) - Body ground B - Body ground Rear door courtesy light switch RH input Rear door RH closed Pulse generation
      I13-11 (L2) - Body ground R - Body ground Front door key-linked lock input Front door key cylinder turned to lock Below 1 V
      I13-11 (L2) - Body ground R - Body ground Front door key-linked lock input Front door key cylinder off Pulse generation
      I13-24 (UL3) - Body ground

      GR - Body ground*1

      Y - Body ground*2

      		 Driver door key-linked unlock input Driver door key cylinder turned to unlock Below 1 V
      I13-24 (UL3) - Body ground

      GR - Body ground*1

      Y - Body ground*2

      		 Driver door key-linked unlock input Driver door key cylinder off Pulse generation
      I13-7 (LSFL) - Body ground V - Body ground Front door LH unlock detection switch input Front door LH unlocked Below 1 V
      I13-7 (LSFL) - Body ground V - Body ground Front door LH unlock detection switch input Ignition switch off, all doors closed and front door LH locked Pulse generation
      I13-18 (LSFR) - Body ground W - Body ground Front door RH unlock detection switch input Front door RH unlocked Below 1 V
      I13-18 (LSFR) - Body ground W - Body ground Front door RH unlock detection switch input Ignition switch off, all doors closed and front door RH locked Pulse generation
      3A-53 (LSR) - Body ground Y - Body ground Rear door RH unlock detection switch input Rear door RH or LH unlocked Below 1 V
      3A-53 (LSR) - Body ground Y - Body ground Rear door RH unlock detection switch input Ignition switch off, all doors closed, rear door RH and LH locked Pulse generation
      3C-17 (LSR) - Body ground LG - Body ground Rear door LH unlock detection switch input Rear door LH or RH unlocked Below 1 V
      3C-17 (LSR) - Body ground LG - Body ground Rear door LH unlock detection switch input Ignition switch off, all doors closed, rear door LH and RH locked Pulse generation
      3C-9 (LGCY) - Body ground W - Body ground Luggage compartment door courtesy light switch input Luggage compartment door open Below 1 V
      3C-9 (LGCY) - Body ground W - Body ground Luggage compartment door courtesy light switch input Luggage compartment door closed 11 to 14 V

      • *1: for LHD

      • *2: for RHD

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