BACK DOOR CLOSER SYSTEM TERMINALS OF ECU


  1. CHECK MULTIPLEX NETWORK DOOR ECU

    A00YSA9E02

    1. Disconnect the U18 and U19 multiplex network door ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      U18-1 (ECUB) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      U18-7 (IG) - Body ground W - Body ground IG power supply Ignition switch ON 11 to 14 V
      U18-7 (IG) - Body ground W - Body ground IG power supply Ignition switch off Below 1 V
      U19-8 (B) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      U19-7 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω

    3. Reconnect the U18 and U19 multiplex network door ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      U19-10 (DC+) - U19-9 (DC-) B - R Back door lock assembly (back door lock motor) circuit Back door lock motor operating 11 to 14 V
      U19-10 (DC+) - U19-9 (DC-) B - R Back door lock assembly (back door lock motor) circuit Back door lock motor not operating Below 1 V
      U18-19 (FUL) - Body ground W - Body ground Back door lock assembly (back door courtesy switch) signal circuit Back door closed → open 11 to 14 V → Below 1 V
      U18-21 (HAF) - Body ground G - Body ground Back door lock assembly (latch switch) signal circuit Back door closed → fully open 11 to 14 V → Below 1 V
      U18-24 (POS) - Body ground GR - Body ground Back door lock assembly (sector switch) signal circuit Back door open → Back door closer operates → Back door closed Below 1 V → 11 to 14 V → Below 1 V

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Entry and Start System)

    A00YRN5E77

    1. Disconnect the G82 and G84 certification ECU (smart key ECU assembly) connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G82-2 (+B) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      G82-10 (CUTB) - Body ground P - Body ground Battery power supply Always 11 to 14 V
      G84-5 (IG) - Body ground LG - Body ground IG power supply Ignition switch ON 11 to 14 V
      G84-5 (IG) - Body ground LG - Body ground IG power supply Ignition switch off Below 1 V
      G82-11 (E) - Body ground BR - Body ground Body ground Always Below 1 Ω

    3. Reconnect the G82 and G84 certification ECU (smart key ECU assembly) connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G83-27 (TSW5) - Body ground Y - Body ground Back door opener switch assembly signal Back door opener switch assembly off Pulse generation
      G83-27 (TSW5) - Body ground Y - Body ground Back door opener switch assembly signal Back door opener switch assembly on Below 1 V

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

    A00YV0YC04
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU).

      for LHD: Click here

      for RHD: Click here

    2. Connect the instrument panel junction block assembly connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A-30 (BECU) -Body ground None - Body ground Battery power supply Always 11 to 14 V
      A-29 (ACC) -Body ground None - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      A-29 (ACC) -Body ground None - Body ground ACC power supply Ignition switch off Below 1 V
      A-32 (IG) - Body ground None - Body ground IG power supply Ignition switch ON 11 to 14 V
      A-32 (IG) - Body ground None - Body ground IG power supply Ignition switch off Below 1 V
      A-11 (GND1) - Body ground None - Body ground Body ground Always Below 1 Ω

    4. Install the main body ECU (multiplex network body ECU).

      for LHD : Click here

      for RHD : Click here

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G78-23 (BDSU) - Body ground* R - Body ground Back door opener switch assembly signal Back door opener switch assembly off Pulse generation
      G78-23 (BDSU) - Body ground* R - Body ground Back door opener switch assembly signal Back door opener switch assembly on Below 1 V

      *: w/o Entry and Start System