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Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK MAIN BODY ECU 
    Fig 1: Identifying Terminals Of ECU
    G05160601Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DD and DB ECU connectors.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      MAIN BODY ECU RESISTANCE AND VOLTAGE

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      DD-62 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DB-13 (BECU) - DD-62 (GND1) GR - W-B BECU power supply Always 11 to 14 V

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

    3. Reconnect the DD and DB ECU connectors.
    4. Measure the voltage and resistance according to the value(s) in the table below.
      MAIN BODY ECU VOLTAGE AND RESISTANCE

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      J1-5 (KSW) - DD-62 (GND1) LG - W-B Key unlock warning switch signal Key inserted in the ignition key Cylinder Below 1 Ω
      No key in the ignition key cylinder 10 kΩ or higher
      J4-24 (DCTY) - Body ground BR - Body ground Front door courtesy light switch LH signal Front door LH open Below 1 V
      Front door LH closed Pulse generation
      J3-21 (PCTY) - Body ground O - Body ground Front door courtesy light switch RH signal Front door RH open Below 1 V
      Front door RH closed Pulse generation
      DC-2 (LCTY) - Body ground* 1, *2 B - Body ground Rear door courtesy light switch LH signal Rear door LH open Below 1 V
      Rear door LH closed Pulse generation
      J3-25 (RRCY) - Body ground*1, *2 L - Body ground Rear door courtesy light switch RH signal Rear door RH open Below 1 V
      Rear door RH closed Pulse generation
      DD-53 (L2) - Body ground V - Body ground Front door lock key switch LH input Front door key cylinder LH to LOCK Pulse generation
      Ignition switch OFF, all doors closed and front door key cylinder LH to neutral position Below 1 V
      J4-10 (UL3) - Body ground B - Body ground Front door lock key switch LH input Front door key cylinder LH to UNLOCK Pulse generation
      Ignition switch OFF, all doors closed and front door key cylinder LH to neutral position Below 1 V
      J4-5 (ACTD) - Body ground P - Body ground Front door lock motor LH unlock activation output Master switch (door control switch) or front door key cylinder LH to LOCK Below 1 V
      Master switch (door control switch) or front door key cylinder LH to UNLOCK Pulse generation
      DD-3 (ACT+) - Body ground W - Body ground Door lock motor lock activation output Master switch (door control switch) or front door key cylinder LH to UNLOCK Below 1 V
      Master switch (door control switch) or front door key cylinder LH to LOCK Pulse generation
      J4-9 (LSWD) - Body ground P - Body ground Front door unlock detection switch LH input Front door LH UNLOCK Below 1 V
      Front door LH LOCK Pulse generation
      DD-2 (ACT-) - Body ground L - Body ground Door lock motor unlock activation output Master switch (door control switch) or front door key cylinder LH to LOCK Below 1 V
      Master switch (door control switch) or front door key cylinder LH to UNLOCK Pulse generation
      DC-24 (ACT+) - Body ground*1, *2 W - Body ground Rear door lock motor LH lock activation output Master switch (door control switch) or front door key cylinder LH to UNLOCK Below 1 V
      Master switch (door control switch) or front door key cylinder LH to LOCK Pulse generation
      DC-23 (ACT-) - Body ground*1, *2 L - Body ground Rear door lock motor LH unlock activation output Master switch (door control switch) or front door key cylinder LH to UNLOCK Below 1 V
      Master switch (door control switch) or front door key cylinder LH to LOCK Pulse generation
      J3-27 (LSWP) - Body ground V - Body ground Front door unlock detection switch RH input Front door RH UNLOCK Below 1 V
      Front door RH LOCK Pulse generation
      J3-27 (LSWL) - Body ground*1, *2 GR - Body ground Rear door unlock detection switch LH input Rear door LH UNLOCK Below 1 V
      Rear door LH LOCK Pulse generation
      J3-27 (LSWR) - Body ground*1, *2 Y - Body ground Rear door unlock detection switch RH input Rear door RH UNLOCK Below 1 V
      Rear door RH LOCK Pulse generation
      J3-10 (PRG) - Body ground SB - Body ground Door control receiver output Transmitter switch ON → OFF (No key in ignition key cylinder, all doors closed) Pulse generation
      J3-12 (RDA) - Body ground V - Body ground Door control receiver input Transmitter switch ON → OFF (No key in ignition key cylinder, all doors closed) Pulse generation
      J2-4 (HAZ) - Body ground O - Body ground Hazard warning light signal Answer-back ON Pulse generation
      Answer-back OFF Below 1 V
      J1-7 (BZR) - Body ground R - Body ground Wireless door lock buzzer signal Answer-back ON Pulse generation
      Answer-back OFF Below 1 V
      J1-6 (SH) - Body ground W - Body ground Security horn signal Panic switch OFF Below 1 V
      Panic switch ON Pulse generation
      DB-1 (HORN) - Body ground V - Body ground Vehicle's horn signal Panic switch OFF Below 1 V
      Panic switch ON Pulse generation
      HINT:
      • *1: for Double Cab
      • *2: for CrewMax

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

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