BACK DOOR CLOSER SYSTEM TERMINALS OF ECU


  1. CHECK BACK DOOR MOTOR UNIT (POWER BACK DOOR ECU) (w/ Power Back Door System)

    A01CG9EE10

    1. Disconnect the N18 power back door ECU connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      N18-12 (B) - Body ground B - Body ground Battery power supply Always 11 to 14 V
      N18-10 (ECUB) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      N18-8 (IG) - Body ground R - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      N18-8 (IG) - Body ground R - Body ground IG power supply Engine switch off Below 1 V
      N18-11 (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 N18 power back door ECU connector.

    4. Initialize the power back door system Click here.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      N18-2 (DC+) - N18-1 (DC-) B - R Back door lock motor circuit Back door lock motor operating 11 to 14 V
      N18-2 (DC+) - N18-1 (DC-) B - R Back door lock motor circuit Back door lock motor not operating Below 1 V
      N18-20 (FUL) - Body ground W - Body ground Back door courtesy switch circuit Back door closed 11 to 14 V
      N18-20 (FUL) - Body ground W - Body ground Back door courtesy switch circuit Back door open Below 1 V
      N18-22 (HAF) - Body ground GR - Body ground Back door lock half-latch switch signal circuit Back door open → Back door closer operates → Back door closed Below 1 V → 11 to 14 V → Below 1 V
      N18-24 (POS) - Body ground P - Body ground Back door lock position switch signal circuit Back door open → Back door closer operates → Back door closed Below 1 V → 11 to 14 V → Below 1 V

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

  2. CHECK MULTIPLEX NETWORK DOOR ECU (BACK DOOR CLOSER ECU) (w/o Power Back Door System)

    A01CBICE05

    1. Disconnect the N33 back door closer ECU connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      N33-4 (B) - Body ground B - Body ground Battery power supply Always 11 to 14 V
      N33-16 (ECUB) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      N33-15 (IG) - Body ground R - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      N33-15 (IG) - Body ground R - Body ground IG power supply Engine switch off Below 1 V
      N33-3 (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 N33 back door closer ECU connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      N33-2 (DC+) - N33-1 (DC-) B - R Back door lock motor circuit Back door lock motor operating 11 to 14 V
      N33-2 (DC+) - N33-1 (DC-) B - R Back door lock motor circuit Back door lock motor not operating Below 1 V
      N33-6 (FUL) - Body ground W - Body ground Back door courtesy switch circuit Back door closed 11 to 14 V
      N33-6 (FUL) - Body ground W - Body ground Back door courtesy switch circuit Back door open Below 1 V
      N33-5 (HAF) - Body ground GR - Body ground Back door lock half-latch switch signal circuit Back door open → Back door closer operates → Back door closed Below 1 V → 11 to 14 V → Below 1 V
      N33-7 (POS) - Body ground P - Body ground Back door lock position switch signal circuit Back door open → Back door closer operates → Back door closed Below 1 V → 11 to 14 V → Below 1 V

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

  3. CHECK MAIN BODY ECU

    A01CDWIE03

    1. Disconnect the G48, G49 and G50 connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G48-6 (AM1) - Body ground G - Body ground Battery power supply Always 11 to 14 V
      G49-1 (AM2) - Body ground G - Body ground Battery power supply Always 11 to 14 V
      G48-26 (BDSU) - Body ground LG - Body ground Back door opener switch signal circuit Back door opener switch off 10 kΩ or higher
      G48-26 (BDSU) - Body ground LG - Body ground Back door opener switch signal circuit Back door opener switch on Below 1 Ω
      G50-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G50-16 (CANP) - Body ground B - Body ground CAN Always 10 kΩ or higher
      G50-15 (CANN) - Body ground W - Body ground CAN Always 10 kΩ or higher

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

    3. Reconnect the G48, G49 and G50 connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G48-26 (BDSU) - Body ground LG - Body ground Back door opener switch signal circuit Back door opener switch off Pulse generation
      G48-26 (BDSU) - Body ground LG - Body ground Back door opener switch signal circuit Back door opener switch on Below 1 V

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