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Terminals Of Ecu

  1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 
    1. Disconnect the 2A, 2B, 2E, 2F, 2G and 2J junction block connectors and main body ECU connector.
      Fig 1: Identifying Instrument Panel Junction Block Connector Terminal (1 Of 2)
      G06036504Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Identifying Instrument Panel Junction Block Connector Terminal (2 Of 2)
      G06036505Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.
      TESTER CONNECTION SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      2A-21 (DCTY) - Body ground V - Body ground Driver side door courtesy light switch input Driver side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      2B-30 (BECU) - Body ground W - Body ground +B power supply Always 11 to 14 V
      2E-19 (RCTY) - Body ground Y - Body ground Rear courtesy light switch input Rear door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      2E-20 (PCTY) - Body ground BE - Body ground Passenger side courtesy light switch input Passenger side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      2F-5 (ACC) - Body ground L - Body ground Ignition power supply (ACC signal) Ignition switch ACC → off 11 to 14 V → Below 1 V
      2G-1 (IG) - Body ground W - Body ground Ignition power supply (IG signal) Ignition switch ON → off 11 to 14 V → Below 1 V
      2J-1 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      HINT:

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

  2. CHECK THEFT WARNING ECU ASSEMBLY 
    1. Disconnect the E72 theft warning ECU assembly connector.
      Fig 3: Identifying E72 Theft Warning ECU Assembly Connector Terminal
      G06036506Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance between each terminal of the wire harness side connectors and body ground.
      TESTER CONNECTION SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E72-7 (KSW) - E72-16 (E) L-W-B Unlock warning switch input No key in ignition key cylinder (OFF) → Key inserted (ON) 10 kΩ or higher → Below 1 Ω
      E72-9 (IG) - E72-16 (E) L-W-B Ignition power supply (IG signal) Ignition switch ON → off 11 to 14 V → Below 1 V
      E72-11 (+B1) - E72-16 (E) R-W-B +B power supply Always 11 to 14 V
      E72-16 (E) - 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 E72 theft warning ECU assembly connector.
    4. Measure the voltage between each terminal of the connector.
      TESTER CONNECTION SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E72-24 (BRK+) - E72-16 (E) LG - W-B Alarm BERKES communication Theft deterrent system is in alarm sounding state Pulse generation (1.5 V ↔ Below 1.2 V)
      E72-25 (BRK-) - E72-16 (E) W-W-B Alarm BERKES communication All doors are locked using key (Theft deterrent system is in arming preparation state) Pulse generation (1.5 V ↔ Below 1.2 V)
      E72-29 (IND) - E72-16 (E) Y-W-B Security indicator output Security indicator light assembly in on (It comes on only in arming preparation state or alarm sounding state. It flashes when Immobilizer is operating.) 3 to 6 V
      E72-3 (GBS) - E72-16 (E) BE - W-B Glass breakage sensor ECU communication Armed state → Alarm sounds (on glass breakage detection) Below 1 V → Pulse generation
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