LIGHTING SYSTEM TERMINALS OF ECU


  1. INSTRUMENT PANEL JUNCTION BLOCK (w/ Illuminated Entry System)


    1. Disconnect the 5E, 5G, and 5M instrument panel junction block connectors.

      A01BCWTE01
      Text in Illustration
      *A for LHD *B for RHD

    2. Measure the voltage and resistance between the wire harness side connectors and body ground.

      Voltage
      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B (5G-1) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      ECUB (5E-17) - Body ground W-R - Body ground Battery power supply Always 11 to 14 V
      Resistance
      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (5E-12) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND (5M-7) - 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 5E, 5G, and 5M instrument panel junction block connectors.

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

      Resistance
      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CLTE (H7-24) - GND (5E-12)*1 W - W-B Ground Always Below 1 Ω
      Voltage (for LHD)
      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      RCTY (5A-9) - GND (5E-12)

      W - W-B*3

      G - W-B*4

      		 Back door courtesy switch signal Back door open Below 1 V
      RCTY (5A-9) - GND (5E-12)

      W - W-B*3

      G - W-B*4

      		 Back door courtesy switch signal Back door closed

      11 to 14 V*7

      Pulse generation*7
      RCTY (5A-18) - GND (5E-12) W - W-B Rear door courtesy switch RH signal Rear door RH open Below 1 V
      RCTY (5A-18) - GND (5E-12) W - W-B Rear door courtesy switch RH signal Rear door RH closed

      11 to 14 V*7

      Pulse generation*7
      RCTY (5A-30) - GND (5E-12)*2 W - W-B Rear door courtesy switch LH signal Rear door LH open Below 1 V
      RCTY (5A-30) - GND (5E-12)*2 W - W-B Rear door courtesy switch LH signal Rear door LH closed

      11 to 14 V*7

      Pulse generation*7
      PCTY (5E-10) - GND (5E-12) R-L - W-B Front passenger side door courtesy switch signal Front passenger side door open Below 1 V
      PCTY (5E-10) - GND (5E-12) R-L - W-B Front passenger side door courtesy switch signal Front passenger side door closed

      11 to 14 V*7

      Pulse generation*7
      DCTY (5E-27) - GND (5E-12) R-G - W-B Driver side door courtesy switch signal Driver side door open Below 1 V
      DCTY (5E-27) - GND (5E-12) R-G - W-B Driver side door courtesy switch signal Driver side door closed

      11 to 14 V*7

      Pulse generation*7
      TRLY (5H-3) - GND (5E-12)*1 R - W-B Headlight dimmer switch signal Headlight dimmer switch OFF 11 to 14 V
      TRLY (5H-3) - GND (5E-12)*1 R - W-B Headlight dimmer switch signal Headlight dimmer switch AUTO Below 1 V
      LP (5H-5) - GND (5E-12) R-Y - W-B Ignition key cylinder light signal Ignition key cylinder light on using illuminated entry system Below 1 V
      LP (5H-5) - GND (5E-12) R-Y - W-B Ignition key cylinder light signal Ignition key cylinder light off using illuminated entry system 11 to 14 V
      LP (5K-2) - GND (5E-12) LG - W-B Interior light signal Interior light on using illuminated entry system Below 1 V
      LP (5K-2) - GND (5E-12) LG - W-B Interior light signal Interior light off using illuminated entry system 11 to 14 V
      AUTO (H7-10) - GND (5E-12)*1 BE - W-B Headlight dimmer switch signal Headlight dimmer switch OFF 11 to 14 V
      AUTO (H7-10) - GND (5E-12)*1 BE - W-B Headlight dimmer switch signal Headlight dimmer switch AUTO Below 1 V
      HRLY (H7-14) - GND (5E-12)*1 R-Y - W-B HEAD relay drive signal Headlight dimmer switch OFF 11 to 14 V
      HRLY (H7-14) - GND (5E-12)*1 R-Y - W-B HEAD relay drive signal Headlight dimmer switch AUTO (when headlights are on) Below 1 V
      LSWD (H7-20) - GND (5E-12) W - W-B Driver side door unlock detection switch signal Driver side door unlocked Below 1 V
      LSWD (H7-20) - GND (5E-12) W - W-B Driver side door unlock detection switch signal Driver side door locked

      11 to 14 V*7

      Pulse generation*7
      CLTS (H7-25) - GND (5E-12)*1 B - W-B Automatic light control sensor signal Ignition switch OFF Below 1 V
      CLTS (H7-25) - GND (5E-12)*1 B - W-B Automatic light control sensor signal

      Ignition switch ON

      Headlight dimmer switch AUTO

      Pulse generation

      (see waveform 1)
      CLTB (H7-26) - GND (5E-12)*1 P - W-B Automatic light control sensor signal Always 11 to 14 V
      EHW (5S-17) - GND (5E-12) G-W - W-B Hazard warning switch signal Hazard warning switch OFF 11 to 14 V
      EHW (5S-17) - GND (5E-12) G-W - W-B Hazard warning switch signal Hazard warning switch ON Below 1 V
      Voltage (for RHD)
      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      RCTY (5A-9) - GND (5E-12)

      W - W-B*3

      G - W-B*4

      		 Back door courtesy switch signal Back door open Below 1 V
      RCTY (5A-9) - GND (5E-12)

      W - W-B*3

      G - W-B*4

      		 Back door courtesy switch signal Back door closed

      11 to 14 V*7

      Pulse generation*7
      RCTY (5A-18) - GND (5E-12)*2 W - W-B Rear door courtesy switch RH signal Rear door RH open Below 1 V
      RCTY (5A-18) - GND (5E-12)*2 W - W-B Rear door courtesy switch RH signal Rear door RH closed

      11 to 14 V*7

      Pulse generation*7
      RCTY (5A-30) - GND (5E-12) W - W-B Rear door courtesy switch LH signal Rear door LH open Below 1 V
      RCTY (5A-30) - GND (5E-12) W - W-B Rear door courtesy switch LH signal Rear door LH closed

      11 to 14 V*7

      Pulse generation*7
      PCTY (5E-10) - GND (5E-12) R-G - W-B Front passenger side door courtesy switch signal Front passenger side door open Below 1 V
      PCTY (5E-10) - GND (5E-12) R-G - W-B Front passenger side door courtesy switch signal Front passenger side door closed

      11 to 14 V*7

      Pulse generation*7
      DCTY (5E-27) - GND (5E-12) R-L - W-B Driver side door courtesy switch signal Driver side door open Below 1 V
      DCTY (5E-27) - GND (5E-12) R-L - W-B Driver side door courtesy switch signal Driver side door closed

      11 to 14 V*7

      Pulse generation*7
      TRLY (5H-3) - GND (5E-12)*1 R - W-B Headlight dimmer switch signal Headlight dimmer switch OFF 11 to 14 V
      TRLY (5H-3) - GND (5E-12)*1 R - W-B Headlight dimmer switch signal Headlight dimmer switch AUTO Below 1 V
      LP (5H-5) - GND (5E-12) R-Y - W-B Ignition key cylinder light signal Ignition key cylinder light on using illuminated entry system Below 1 V
      LP (5H-5) - GND (5E-12) R-Y - W-B Ignition key cylinder light signal Ignition key cylinder light off using illuminated entry system 11 to 14 V
      LP (5T-2) - GND (5E-12)

      LG - W-B*5

      Y - W-B*6

      		 Interior light signal Interior lights on using illuminated entry system Below 1 V
      LP (5T-2) - GND (5E-12)

      LG - W-B*5

      Y - W-B*6

      		 Interior light signal Interior light off using illuminated entry system 11 to 14 V
      AUTO (H7-10) - GND (5E-12)*1 BE - W-B Headlight dimmer switch signal Headlight dimmer switch OFF 11 to 14 V
      AUTO (H7-10) - GND (5E-12)*1 BE - W-B Headlight dimmer switch signal Headlight dimmer switch AUTO Below 1 V
      HRLY (H7-14) - GND (5E-12)*1 R-Y - W-B HEAD relay drive signal Headlight dimmer switch OFF 11 to 14 V
      HRLY (H7-14) - GND (5E-12)*1 R-Y - W-B HEAD relay drive signal Headlight dimmer switch AUTO (when headlights are on) Below 1 V
      LSWD (H7-20) - GND (5E-12) W - W-B Driver side door unlock detection switch signal Driver side door unlocked Below 1 V
      LSWD (H7-20) - GND (5E-12) W - W-B Driver side door unlock detection switch signal Driver side door locked

      11 to 14 V*7

      Pulse generation*7
      CLTS (H7-25) - GND (5E-12)*1 B - W-B Automatic light control sensor signal Ignition switch OFF Below 1 V
      CLTS (H7-25) - GND (5E-12)*1 B - W-B Automatic light control sensor signal

      Ignition switch ON

      Headlight dimmer switch AUTO

      Pulse generation

      (see waveform 1)
      CLTB (H7-26) - GND (5E-12)*1 P - W-B Automatic light control sensor signal Always 11 to 14 V
      EHW (5S-17) - GND (5E-12) G-W - W-B Hazard warning switch signal Hazard warning switch OFF 11 to 14 V
      EHW (5S-17) - GND (5E-12) G-W - W-B Hazard warning switch signal Hazard warning switch ON Below 1 V

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

      *1: w/ Automatic Light Control System

      *2: for 5-Door

      *3: for 6 Speakers

      *4: except 6 Speakers

      *5: w/ Personal Light Assembly

      *6: w/o Personal Light Assembly

      Tech Tips

      *7: The specified value changes depending on vehicle conditions.


      1. A01BDLOE01

        Waveform 1

        Item Description
        Terminal CLTS (H7-25) - GND (5E-12)
        Gauge 5 V/DIV, 5 ms/DIV
        Condition Ignition switch ON, Headlight dimmer switch AUTO

        Tech Tips

        If the ambient light becomes brighter, width A becomes narrower.