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


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

    A01EWY1E23
    Text in Illustration
    *A for LHD *B for RHD

    1. Disconnect the MB, I12 and I13 main body ECU (multiplex network body ECU) connector.

    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
      I13-17 (KSW) - Body ground G - Body ground Unlock warning switch signal No key in ignition key cylinder 10 kΩ or higher
      I13-17 (KSW) - Body ground G - Body ground Unlock warning switch signal Key in ignition key cylinder Below 1 Ω

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

    3. Reconnect the MB, I12 and I13 main body ECU (multiplex network body ECU) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      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
      3C-15 (FLCY) - Body ground L - Body ground Front door LH courtesy light switch input Front door LH open Below 1 V
      3C-15 (FLCY) - Body ground L - Body ground Front door LH courtesy light switch input Front door LH closed 11 to 14 V
      I13-19 (FRCY) - Body ground Y - Body ground Front door RH courtesy light switch input Front door RH open Below 1 V
      I13-19 (FRCY) - Body ground Y - Body ground Front door RH courtesy light switch input Front door RH closed 11 to 14 V
      I13-1 (LCTY) - Body ground P - Body ground Rear door LH courtesy light switch input Rear door LH open Below 1 V
      I13-1 (LCTY) - Body ground P - Body ground Rear door LH courtesy light switch input Rear door LH closed Pulse generation
      I13-6 (RCTY) - Body ground B - Body ground Rear door RH courtesy light switch input Rear door RH open Below 1 V
      I13-6 (RCTY) - Body ground B - Body ground Rear door RH courtesy light switch input Rear door RH closed 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 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 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 and 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 and rear door LH and RH locked Pulse generation
      2D-22 (BZR) - Body ground BE - Body ground Wireless door lock buzzer signal Wireless door lock buzzer off Below 1 V
      2D-22 (BZR) - Body ground BE - Body ground Wireless door lock buzzer signal Wireless door lock buzzer on Pulse generation
      I13-4 (PRG) - Body ground P - Body ground Signal output to door control receiver Key inserted in ignition key cylinder → key pulled out of ignition key cylinder 11 to 14 V → Pulse generation → 11 to 14 V
      I13-16 (RDA) - Body ground L - Body ground Signal input from door control receiver Ignition switch off, all doors closed and door control transmitter module sub-assembly switch not pressed 11 to 14 V
      Ignition switch off, all doors closed and door control transmitter module sub-assembly switch pressed Pulse generation
      I13-17 (KSW) - Body ground G - Body ground Key unlock warning switch input No key in ignition key cylinder Pulse generation
      I13-17 (KSW) - Body ground G - Body ground Key unlock warning switch input Key in ignition key cylinder Below 1 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.

  2. CHECK DOOR CONTROL RECEIVER

    A01EX19E04

    1. Disconnect the O24 door control receiver connector.

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

      Tech Tips

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      O24-5 (+B) - Body ground W - Body ground Battery (power supply) Always 11 to 14 V
      O24-1 (GND) - Body ground B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the O24 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
      O24-3 (PRG) - O24-1 (GND) P - BR Signal input from main body ECU (multiplex network body ECU) Key inserted in ignition key cylinder → key pulled out of ignition key cylinder 11 to 14 V → Pulse generation → 11 to 14 V
      O24-2 (RDA) - O24-1 (GND) L - BR Signal output to main body ECU (multiplex network body ECU) Ignition switch off, all doors closed and door control transmitter module sub-assembly switch not pressed 11 to 14 V
      Ignition switch off, all doors closed and door control transmitter module sub-assembly switch pressed Pulse generation

      • If the result is not as specified, the door control receiver may have a malfunction.