WIRELESS DOOR LOCK CONTROL SYSTEM TERMINALS OF ECU


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

    B006MFRC01
    *1 Junction Block Assembly LH - -
    B006Q2ZC04
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU) from the junction block assembly LH.

      Click here

    2. Reconnect the junction block assembly LH connectors.

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

      Tech Tips

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
      MB-31 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      MB-30 (ACC) - Body ground - ACC power supply Engine switch on (ACC) 11 to 14 V
      MB-30 (ACC) - Body ground - ACC power supply Engine switch off Below 1 V
      MB-32 (IG) - Body ground - IG power supply Engine switch on (IG) 11 to 14 V
      MB-32 (IG) - Body ground - IG power supply Engine switch off Below 1 V

    4. Install the main body ECU (multiplex network body ECU) to junction block assembly LH.

      Click here

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      4H-12 (ACT-) - Body ground R - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder off Below 1 V
      4H-12 (ACT-) - Body ground R - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder unlocked 11 to 14 V
      4D-4 (ACT-) - Body ground R - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder off Below 1 V
      4D-4 (ACT-) - Body ground R - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder unlocked 11 to 14 V
      4H-7 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (except driver door) Door control switch or driver door key cylinder off Below 1 V
      4H-7 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (except driver door) Door control switch or driver door key cylinder locked 11 to 14 V
      4D-5 (ACT+) - Body ground W - Body ground Door lock motor lock drive output (except driver door) Door control switch or driver door key cylinder off Below 1 V
      4D-5 (ACT+) - Body ground W - Body ground Door lock motor lock drive output (except driver door) Door control switch or driver door key cylinder locked 11 to 14 V
      G63-27 (FRCY) - Body ground L - Body ground Front door courtesy light switch assembly RH input Front door RH open Below 1 V
      G63-27 (FRCY) - Body ground L - Body ground Front door courtesy light switch assembly RH input Front door RH closed 11 to 14 V or Pulse generation
      G63-6 (FLCY) - Body ground GR - Body ground Front door courtesy light switch assembly LH input Front door LH open Below 1 V
      G63-6 (FLCY) - Body ground GR - Body ground Front door courtesy light switch assembly LH input Front door LH closed 11 to 14 V or Pulse generation
      4H-23 (LCTY) - Body ground L - Body ground Rear door courtesy light switch assembly LH input Slide door LH open Below 1 V
      4H-23 (LCTY) - Body ground L - Body ground Rear door courtesy light switch assembly LH input Slide door LH closed 11 to 14 V or Pulse generation
      4D-18 (RCTY) - Body ground LG - Body ground Rear door courtesy light switch assembly RH input Slide door RH open Below 1 V
      4D-18 (RCTY) - Body ground LG - Body ground Rear door courtesy light switch assembly RH input Slide door RH closed 11 to 14 V or Pulse generation
      4H-22 (LSFL) - Body ground SB - Body ground Front door LH unlock detection switch input Front door LH unlocked Below 1 V
      4H-22 (LSFL) - Body ground SB - Body ground Front door LH unlock detection switch input Front door LH locked 11 to 14 V or Pulse generation
      4A-38 (LSFR) - Body ground Y - Body ground Front door RH unlock detection switch input Front door RH unlocked Below 1 V
      4A-38 (LSFR) - Body ground Y - Body ground Front door RH unlock detection switch input Front door RH locked 11 to 14 V or Pulse generation
      G62-2 (LSWR) - Body ground V - Body ground Slide door RH unlock detection switch input Slide door RH unlocked Below 1 V
      G62-2 (LSWR) - Body ground V - Body ground Slide door RH unlock detection switch input Slide door RH locked 11 to 14 V or Pulse generation
      4H-35 (LSWL) - Body ground SB - Body ground Slide door LH unlock detection switch input Slide door LH unlocked Below 1 V
      4H-35 (LSWL) - Body ground SB - Body ground Slide door LH unlock detection switch input Slide door LH locked 11 to 14 V or Pulse generation
      4H-36 (BCTY) - Body ground L - Body ground Back door courtesy light switch input Back door open Below 1 V
      4H-36 (BCTY) - Body ground L - Body ground Back door courtesy light switch input Back door closed 11 to 14 V or Pulse generation
      4F-29 (BZR) - Body ground BE - Body ground Wireless door lock buzzer signal Wireless door lock buzzer off Below 1 V
      4F-29 (BZR) - Body ground BE - Body ground Wireless door lock buzzer signal Wireless door lock buzzer on Pulse generation

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    B006OMYE18

    1. Disconnect the G22 certification ECU (smart key ECU assembly) connector.

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

      Tech Tips

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G22-11 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G22-10 (+B) - Body ground GR - Body ground Battery power supply Always 11 to 14 V

    3. Reconnect the G22 certification ECU (smart key ECU assembly) connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G21-18 (RCO) - G22-11 (E) V - W-B

      Output to door control receiver

      (Power supply for door control receiver. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.)

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      3. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

      Pulse generation

      (See waveform 1)
      G21-19 (CSEL) - G22-11 (E) GR - W-B Communication channel switching circuit

      Procedure:


      1. Engine switch off

      2. All doors closed

      		 Below 1 V → 4.5 to 6 V → Below 1 V
      G21-20 (RDAM) - G22-11 (E) P - W-B

      Door control receiver verifies data received from electrical key transmitter sub-assembly.

      Door control receiver sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Door control receiver intermittently grounds 12 V signal from certification ECU (smart key ECU assembly)).

      Procedure:


      1. Engine switch off

      2. All doors locked

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      5. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

      Pulse generation

      (See waveform 2)
    5. B006QP8C12
      *a Before lock or unlock switch of electrical key transmitter sub-assembly pressed
      *b After lock or unlock switch of electrical key transmitter sub-assembly pressed

      Using an oscilloscope, check waveform 1.

      Tech Tips

      The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      Waveform 1 (Reference)
      Item Content
      Tester connection G21-18 (RCO) - G22-11 (E)
      Tool setting 2 V/DIV., 500 ms./DIV.
      Condition

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      3. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed
    6. B006QW7C12
      *a Before lock or unlock switch of electrical key transmitter sub-assembly pressed
      *b After lock or unlock switch of electrical key transmitter sub-assembly pressed

      Using an oscilloscope, check waveform 2.

      Tech Tips

      The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      Waveform 2 (Reference)
      Item Content
      Tester connection G21-20 (RDAM) - G22-11 (E)
      Tool setting 5 V/DIV., 500 ms./DIV.
      Condition

      Procedure:


      1. Engine switch off

      2. All doors locked

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      5. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed