WIRELESS DOOR LOCK CONTROL SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU


    1. Disconnect the 4M, 4K, 4A, G50, G49 and G48 main body ECU connectors.

      A01CFPHE05

    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 connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      4M-1 (IG) - Body ground W - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      4A-26 (ACC) - Body ground GR - Body ground ACC power supply Engine switch on (ACC) 11 to 14 V
      4K-1 (BECU) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      4K-9 (BATB) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      G50-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      4A-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G48-24 (DCTY) - Body ground W - Body ground Driver side door courtesy switch input Driver side door open → closed Below 1 Ω → 10 kΩ or higher
      G49-21 (PCTY) - Body ground L - Body ground Front passenger side door courtesy switch input Front passenger side door open → closed Below 1 Ω → 10 kΩ or higher
      4A-4 (LCTY) - Body ground R - Body ground Rear door LH courtesy light switch input Rear door LH open → closed Below 1 Ω → 10 kΩ or higher
      G49-7 (RCTY) - Body ground LG - Body ground Rear door RH courtesy light switch input Rear door RH open → closed Below 1 Ω → 10 kΩ or higher
      G49-25 (BCTY) - Body ground W - Body ground Back door courtesy light switch input Back door open → closed Below 1 Ω → 10 kΩ or higher

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

    3. Reconnect the 4M, 4K, 4A, G50, G49 and G48 main 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
      G48-24 (DCTY) - Body ground W - Body ground Driver side door courtesy switch input Driver side door open → closed Below 1 V → 11 to 14 V
      G49-21 (PCTY) - Body ground L - Body ground Front passenger side door courtesy switch input Front passenger side door open → closed Below 1 V → 11 to 14 V
      4A-4 (LCTY) - Body ground R - Body ground Rear door LH courtesy light switch input Rear door LH open → closed Below 1 V → Pulse generation
      G49-7 (RCTY) - Body ground LG - Body ground Rear door RH courtesy light switch input Rear door RH open → closed Below 1 V → Pulse generation
      G49-25*1 (BCTY) - Body ground W - Body ground Back door courtesy light switch input Back door open → Luggage compartment light switch off and back door closed Below 1 V → Pulse generation
      Back door open → Luggage compartment light switch on and back door closed Below 1 V → 11 to 14 V
      G49-25*2 (BCTY) - Body ground W - Body ground Back door courtesy light switch input Back door open → closed Below 1 V → 11 to 14 V
      G48-1 (TR+) - Body ground W - Body ground Back door opener motor input Back door closed (locked) → open (unlocked) Below 1 V → 11 to 14 V
      G50-4 (HAZ) - Body ground GR - Body ground Turn signal flasher relay signal Any transmitter switch is pressed → not pressed Below 1 V → 11 to 14 V

      • *1: w/o Back Door Closer

      • *2: w/ Back Door Closer

      If the result is not as specified, the main body ECU may have a malfunction.

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Disconnect the G20 certification ECU (smart key ECU assembly) connector.

      A01CCEFE01

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G20-1 (+B) - Body ground R - Body ground +B power supply Always 11 to 14 V
      G20-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

      • If the result is not as specified, the wire harness side may have a malfunction.

    3. Reconnect the G20 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
      G20-18 (IG) - Body ground R - Body ground Ignition power supply Engine switch off Below 1 V
      G20-18 (IG) - Body ground R - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      G20-19 (ACC) - Body ground GR - Body ground ACC power supply Engine switch off Below 1 V
      G20-19 (ACC) - Body ground GR - Body ground ACC power supply Engine switch on (ACC) 11 to 14 V
      G20-29 (RC0) - G20-17 (E) P - W-B Supply battery to door control receiver Engine switch off, all doors closed and transmitter switch pressed Pulse generation → 4.6 to 5.4 V → Pulse generation
      G20-38 (RDA) - G20-17 (E) V - Body ground Door control receiver output signal Engine switch off, all doors closed and transmitter switch not pressed → switch pressed → switch not pressed 4.6 to 14 V (pulse generation) → Below 2 V → 4.6 to 14 V (pulse generation)
      G20-39 (RSSI) - G20-17 (E) SB - W-B Door control receiver output signal Engine switch off, all doors closed and transmitter switch not pressed → pressed 4.6 to 14 V → Below 1 V
      G20-21 (BZR)* - Body ground SB - Body ground Wireless door lock buzzer output Wireless door lock buzzer ON → OFF 11 to 14 V (pulse generation) → Below 1 V

      • *: w/ Wireless Buzzer Function

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