LIGHTING SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

    A01EL3SE04

    1. Disconnect the 2A and 2F main body ECU (driver side junction block assembly) connectors.

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

      Symbols Wiring Color Terminal Description Condition Specified Condition
      2A-1 - Body ground B - Body ground Battery power supply Always 11 to 14 V
      2F-16 - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the 2A and 2F main body ECU (driver side junction block assembly) connectors.

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

      Symbols Wiring Color Terminal Description Condition Specified Condition
      2F-5 (LSR) - Body ground Y - Body ground Rear door unlock detection switch LH or RH input Rear door LH and RH locked Pulse generation
      Rear door LH or RH unlocked Below 1 V
      2K-9 (ILE)*1 - Body ground R - Body ground Transponder key amplifier illumination drive output Illumination on Below 1 V
      Illumination off 11 to 14 V
      2O-5 (LSR) - Body ground BR - Body ground Rear door unlock detection switch LH or RH input Rear door LH and RH locked Pulse generation
      Rear door LH or RH unlocked Below 1 V
      2O-19 (LCTY) - Body ground R - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      Rear door LH closed Pulse generation
      2R-5 (ILE) - Body ground P - Body ground Interior lights drive output Interior lights on Below 1 V
      Interior lights off 11 to 14 V
      2R-7 (DOMR) - Body ground W - Body ground DOME CUT relay drive output DOME CUT relay off Below 1 V
      DOME CUT relay on 11 to 14 V
      D49-7 (RCTY) - Body ground GR - Body ground Rear door courtesy light switch RH input Rear door RH open Below 1 V
      Rear door RH closed Pulse generation
      D49-21 (PCTY) - Body ground V - Body ground Front passenger side door courtesy light switch input Front passenger side door open Below 1 V
      Front passenger side door closed Pulse generation
      D49-25 (BCTY) - Body ground GR - Body ground Back door courtesy switch input Back door open Below 1 V
      Back door closed Pulse generation
      D49-27 (LSWP) - Body ground P - Body ground Front passenger side door unlock detection switch input Front passenger side door locked Pulse generation
      Front passenger side door unlocked Below 1 V
      D50-9 (LSWD) - Body ground P - Body ground Driver side door unlock detection switch input Driver side door locked Pulse generation
      Driver side door unlocked Below 1 V
      D50-24 (DCTY) - Body ground V - Body ground Driver side door courtesy light switch input Driver side door open Below 1 V
      Driver side door closed Pulse generation

      If the result is not as specified, the main body ECU (driver side junction block assembly) may have a malfunction.


      • *1: w/o Smart Entry and Start System