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Terminals Of Ecu

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU) 
    Fig 1: Instrument Panel Junction Block (Main Body ECU, Front View)
    G04490724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Instrument Panel Junction Block (Main Body ECU, Rear View)
    G04490725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the connectors.
      CONNECTOR TERMINALS VOLTAGE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      HRLY (E15-20) - GND1 (IE-17) BR - W-B Headlight Relay (HEAD signal) Light control switch is OFF or TAIL 10 to 14 V
      HRLY (E15-20) - GND1 (IE-17) BR - W-B Headlight Relay (HEAD signal) Light control switch is HEAD Below 1 V
      DIM (E16-3) - GND1 (IE-17) LG - W-B Daytime running light Relay
      (High beam signal)      		 Light control switch is HEAD Below 1 V
      DIM (E16-3) - GND1 (IE-17) LG - W-B Daytime running light Relay
      (High beam signal)      		 Light control switch is HEAD 10 to 14 V
      TAIL (E15-21) - GND1 (IE-17) W - W-B Taillight relay
      (TAIL signal)      		 Light control switch is OFF Below 1 V
      TAIL (E15-21) - GND1 (IE-17) W - W-B Taillight relay
      (TAIL signal)      		 Light control switch is TAIL 10 to 14 V
      ILE (IK-2) - GND1 (IE-17) W - W-B Illumination signal
      • Room light switch position is DOOR
      • Door closed
      		 10 to 14 V
      ILE (IK-2) - GND1 (IE-17) W - W-B Illumination signal
      • Room light switch position is DOOR
      • Door open
      		 Below 1 V
      FSPT (E15-2) - GND1 (IE-17) V - W-B Foot light illumination (Illumination signal) Foot light illumination OFF 10 to 14 V
      FSPT (E15-2) - GND1 (IE-17) V - W-B Foot light illumination (Illumination signal) Foot light illumination ON Below 1 V
      HU (IJ-4) - GND1 (IE-17) O - W-B Headlight dimmer switch (HIGH signal) Light control switch is HEAD
      Headlight dimmer switch is LOW      		 10 to 14 V
      HU (IJ-4) - GND1 (IE-17) O - W-B Headlight dimmer switch (HIGH signal) Light control switch is HEAD
      Headlight dimmer switch is HIGH      		 Below 1 V
      LCTY (E15-8) - GND1 (IE-17) SB - W-B Courtesy switch
      (Rear left door circuit)      		 Rear left door is closed Below 1 V
      LCTY (E15-8) - GND1 (IE-17) SB - W-B Courtesy switch
      (Rear left door circuit)      		 Rear left door is open 10 to 14 V
      FFGO (E17-17) - GND1 (IE-17) G - W-B Front fog relay
      (Front fog circuit)      		 Front fog light is OFF 10 to 14 V
      FFGO (E17-17) - GND1 (IE-17) G - W-B Front fog relay
      (Front fog circuit)      		 Front fog light is ON Below 1 V
      DCTY (IA-21) - GND1 (IE-17) W - W-B Courtesy switch
      (Front left door circuit)      		 Front left door is open Below 1 V
      DCTY (IA-21) - GND1 (IE-17) W - W-B Courtesy switch
      (Front left door circuit)      		 Front left door is closed 10 to 14 V
      RRCY (ID-7) - GND1 (IE-17) LG - W-B Courtesy switch
      (Rear right door circuit)      		 Rear right door is open Below 1 V
      RRCY (ID-7) - GND1 (IE-17) LG - W-B Courtesy switch
      (Rear right door circuit)      		 Rear right door is closed 10 to 14 V
      HF (E15-22) - GND1 (IE-17) R - W-B Headlight dimmer switch
      (FLASH signal)      		 Headlight dimmer switch is OFF 10 to 14 V
      HF (E15-22) - GND1 (IE-17) R - W-B Headlight dimmer switch
      (FLASH signal)      		 Headlight dimmer switch is FLASH Below 1 V
      FFOG (E17-13) - GND1 (IE-17) GR - W-B Front fog light switch
      (Front fog light signal)      		 Light control switch is TAIL Fog light switch is OFF 10 to 14 V
      FFOG (E17-13) - GND1 (IE-17) GR - W-B Front fog light switch
      (Front fog light signal)      		 Light control switch is TAIL Fog light switch is ON Below 1 V
      PCTY (IC-14) - GND1 (IE-17) BR - W-B Courtesy switch
      (Front right door circuit)      		 Front right door is open Below 1 V
      PCTY (IC-14) - GND1 (IE-17) BR - W-B Courtesy switch
      (Front right door circuit)      		 Front right door is closed 10 to 14 V
      BCTY (IA-7) - GND1 (IE-17) LG - W-B Courtesy switch
      (Back door)      		 Back door is open Below 1 V
      BCTY (IA-7) - GND1 (IE-17) LG - W-B Courtesy switch
      (Back door)      		 Back door is closed 10 to 14 V
      LSWP (E15-10) - GND1 (IE-17) Y - W-B Door lock position switch
      (Front right door)      		 Front right door is in unlock position 10 to 14 V
      LSWP (E15-10) - GND1 (IE-17) Y - W-B Door lock position switch (Front right door) Front right door is in lock position Below 1 V
      LSWD (E15-25) - GND1 (IE-17) Y - W-B Door lock position switch (Front left door) Front left door is in unlock position 10 to 14 V
      LSWD (E15-25) - GND1 (IE-17) Y - W-B Door lock position switch (Front left door) Front left door is in lock position Below 1 V

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

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