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Terminals Of Ecu

WARNING: This page is about a different car, the 2009 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 
    1. Disconnect the 2B, 2E, 2F and 2G junction block and E51 ECU connectors.
      Fig 1: Identifying 2B, 2E, 2F And 2G Junction Block And E51 ECU Connectors (Front Side)
      G06010910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Identifying 2B, 2E, 2F And 2G Junction Block And E51 ECU Connectors (Rear Side)
      G06010911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      2B-30 (BECU) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      2F-5 (ACC) - Body ground W - Body ground(1)
      L - Body ground(2)      		 ACC power supply Engine switch on (ACC) 11 to 14 V
      2G-1 (IG) - Body ground W - Body ground Battery power supply Engine switch on (IG) 11 to 14 V
      2E-17 (GND1)-Body ground W-B - Body ground Ground Always Below 1 Ω
      E51-4 (GND2)-Body ground W-B - Body ground Ground Always Below 1 Ω
      (1) for TMC Made
      (2) for NUMMI, TMMC Made

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

    3. Reconnect the 2B, 2E, 2F and 2G junction block and E51 ECU connectors.
    4. Measure the pulse according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      2C-12 (LIN1) - E51-4 (GND2) V-W-B LIN Communication line Engine switch on (IG) Pulse generation

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

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    Fig 3: Identifying E36 ECU Connector
    G06010912Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E36 ECU connector.
    2. Measure the voltage and resistance according to the value (s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E36-1 (+B) - E36-17 (E) W - W-B(1)
      BR - W-B(2)      		 Battery power supply Always 11 to 14 V
      E36-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      (1) for TMC Made
      (2) for NUMMI, TMMC Made

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

    3. Reconnect the E36 ECU connector.
    4. Measure the voltage and pulse according to value (s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E36-18 (IG) - E36-17 (E) L - W-B(1)
      B - W-B(2)      		 Engine switch power supply Engine switch on (IG) 11 to 14 V
      E36-18 (IG) - E36-17 (E) L-W-B(1)
      B - W-B(2)      		 Engine switch power supply Engine switch off Below 1 V
      E36-10 (LIN) - E36-17 (E) V-W-B LIN Communication line Engine switch on (IG) Pulse generation
      (1) for TMC Made
      (2) for NUMMI, TMMC Made

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

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU) 
    Fig 4: Identifying E22 ECU Connector
    G06010913Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E22 ECU connector.
    2. Measure the voltage and resistance according to the value (s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E22-1 (+B) - E22-8 (GND) W - BR(1)
      BR - BR(2)      		 Battery power supply Always 11 to 14 V
      E22-8 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
      (1) for TMC Made
      (2) for NUMMI, TMMC Made

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

    3. Reconnect the E22 ECU connector.
    4. Measure the pulse according to value (s) in the table below.
    CONNECTOR TERMINAL WIRING COLOR REFERENCE

    Tester Connection Wiring Color Terminal Description Condition Specified Condition
    E22-3 (LIN1) - E22-8 (GND) V-BR LIN Communication line Engine switch on (IG) Pulse generation

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

  4. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) 
    Fig 5: Identifying E39 ECU Connector
    G06010914Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E39 ECU connector.
    2. Measure the voltage and resistance according to the value (s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E39-7 (B) - E39-1 (GND) L-W-B Battery power supply Always 11 to 14 V
      E39-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E39-6 (IG2) - E39-1 (GND) B-W-B Engine switch power supply Engine switch on (IG) 11 to 14 V
      E39-6 (IG2) - E39-1 (GND) B-W-B Engine switch power supply Engine switch off Below 1 V

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

    3. Reconnect the E39 ECU connector.
    4. Measure the pulse according to value (s) in the table below.
CONNECTOR TERMINAL WIRING COLOR REFERENCE

Tester Connection Wiring Color Terminal Description Condition Specified Condition
E39-5 (LIN) - E39-1 (GND) V-W-B LIN Communication line Engine switch on (IG) Pulse generation

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

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