WIRELESS DOOR LOCK CONTROL SYSTEM TERMINALS OF ECU


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

    A0004O4E02

    1. Disconnect the MB and H9 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
      H9-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MB-30 (BECU) - Body ground - Auxiliary battery power supply Power switch off 11 to 14 V
      MB-29 (ACC) - Body ground - ACC power supply Power switch on (ACC) 11 to 14 V
      MB-29 (ACC) - Body ground - ACC power supply Power switch off Below 1 V
      MB-31 (ALTB) - Body ground - Auxiliary battery power supply Power switch off 11 to 14 V
      MB-32 (IG) - Body ground - IG power supply Power switch on (IG) 11 to 14 V
      MB-32 (IG) - Body ground - IG power supply Power 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 H9 main body ECU (multiplex network body ECU) connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      3C-11 (ACT-) - Body ground B - Body ground Door lock motor unlock drive output (except driver door) Multiplex network master switch assembly or driver door key cylinder off Below 1 V
      3C-11 (ACT-) - Body ground B - Body ground Door lock motor unlock drive output (except driver door) Multiplex network master switch assembly or driver door key cylinder unlocked 11 to 14 V
      3C-12 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (all doors) Multiplex network master switch assembly or driver door key cylinder off Below 1 V
      3C-12 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (all doors) Multiplex network master switch assembly or driver door key cylinder locked 11 to 14 V
      3B-4 (ACTD) - Body ground GR - Body ground Driver door lock motor unlock drive output Multiplex network master switch assembly or driver door key cylinder off Below 1 V
      3B-4 (ACTD) - Body ground GR - Body ground Driver door lock motor unlock drive output Multiplex network master switch assembly 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
      3B-14 (FRCY) - Body ground Y - Body ground Front door RH courtesy light switch input Front door RH open Below 1 V
      3B-14 (FRCY) - Body ground Y - Body ground Front door RH courtesy light switch input Front door RH closed 11 to 14 V
      H11-3 (LCTY) - Body ground G - Body ground Rear door LH courtesy light switch input Rear door LH open Below 1 V
      H11-3 (LCTY) - Body ground G - Body ground Rear door LH courtesy light switch input Rear door LH closed 11 to 14 V
      H10-6 (RCTY) - Body ground B - Body ground Rear door RH courtesy light switch input Rear door RH open Below 1 V
      H10-6 (RCTY) - Body ground B - Body ground Rear door RH courtesy light switch input Rear door RH closed 11 to 14 V
      H10-7 (LSFL) - Body ground L - Body ground Front door LH unlock detection switch input Front door LH unlocked Below 1 V
      H10-7 (LSFL) - Body ground L - Body ground Front door LH unlock detection switch input Front door LH locked Pulse generation
      H10-18 (LSFR) - Body ground W - Body ground Front door RH unlock detection switch input Front door RH unlocked Below 1 V
      H10-18 (LSFR) - Body ground W - Body ground Front door RH unlock detection switch input Front door RH locked Pulse generation
      3A-53 (LSR) - Body ground GR - Body ground Rear door RH unlock detection switch input Rear door RH or LH unlocked Below 1 V
      3A-53 (LSR) - Body ground GR - Body ground Rear door RH unlock detection switch input Rear door RH and LH locked Pulse generation
      3C-17 (LSR) - Body ground GR - Body ground Rear door LH unlock detection switch input Rear door LH or RH unlocked Below 1 V
      3C-17 (LSR) - Body ground GR - Body ground Rear door LH unlock detection switch input Rear door LH and RH locked Pulse generation
      3D-22 (BZR) - Body ground BE - Body ground Wireless door lock buzzer signal Wireless door lock buzzer off Below 1 V
      3D-22 (BZR) - Body ground BE - Body ground Wireless door lock buzzer signal Wireless door lock buzzer on Pulse generation

      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 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A0003JFE02

    1. Disconnect the A72 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 connectors disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A72-11 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A72-2 (+B) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      A72-10 (CUTB) - Body ground L - Body ground Stand-by power current cut fuse pin input signal Power switch off 11 to 14 V

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

    3. Reconnect the A72 certification ECU (smart key ECU assembly) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H194-5 (IG) - A72-11 (E) LG - W-B IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      Q37-6 (CSEL) - A72-11 (E) R - W-B Communication channel switching circuit Power switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed → electrical key transmitter sub-assembly switch released Below 1 V → 4.5 to 6.0 V → Below 1 V
      Q37-17 (RDAM) - A72-11 (E) Y - W-B RF Signal input circuit Power switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed 11 to 14 V pulse generation at regular intervals
      Q37-5 (RCO) - A72-11 (E) G - W-B Wireless tuner power supply output circuit Power switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed Below 1 V → 4.5 to 5.5 V

      • If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.

  3. CHECK DOOR CONTROL RECEIVER (Door Control Receiver with 12 Pin Connector)

    A0004P2E05

    1. Disconnect the P29 door control receiver 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 connectors disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P29-7 (+B) - Body ground W - Body ground Auxiliary battery (power supply) Power switch off 10 to 16 V
      P29-12 (GND) - Body ground W-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 P29 door control receiver connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P29-6 (CSEL) - P29-12 (GND) V - W-B Smart system receiving channel switching signal input Power switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed → electrical key transmitter sub-assembly switch released Below 1 V → 4.5 to 6.0 V → Below 1 V
      P29-9 (DATA) - P29-12 (GND) Y - W-B Smart system recovery code output Power switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed → electrical key transmitter sub-assembly switch released Below 1 V → 10 to 16 V → Below 1 V
      P29-10 (+5) - P29-12 (GND) G - W-B Receive mode switching signal input Power switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed Below 1 V → 4.5 to 5.5 V

      • If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.

  4. CHECK DOOR CONTROL RECEIVER (Door Control Receiver with 5 Pin Connector)

    A0006RYE02

    1. Disconnect the P30 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.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P30-1 (GND) - Body ground W-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 P30 door control receiver connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P30-2 (CSEL) - P30-1 (GND) V - W-B Smart system receiving channel switching signal input Power switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed → electrical key transmitter sub-assembly switch released Below 1 V → 4.5 to 6.0 V → Below 1 V
      P30-5 (DATA) - P30-1 (GND) Y - W-B Smart system recovery code output Power switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed → electrical key transmitter sub-assembly switch released Below 1 V → 10 to 16 V → Below 1 V
      P30-4 (+5) - P30-1 (GND) G - W-B Receive mode switching signal input Power switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed Below 1 V → 4.5 to 5.5 V

      • If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.