LIN COMMUNICATION SYSTEM > TERMINALS OF ECU

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CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)


  1. Disconnect the 2B, 2E, 2F and 2G junction block and E51 ECU connectors.


    E114510E31


    E125304E03

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

    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
    L - Body ground
    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. *: w/o Smart Key System
    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.

    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.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

B108931E23

  1. Disconnect the E36 ECU connector.

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

    Tester Connection
    Wiring Color
    Terminal Description
    Condition
    Specified Condition
    E36-1 (+B) - E36-17 (E)
    GR - W-B
    Battery power supply
    Always
    11 to 14 V
    E36-17 (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 E36 ECU connector.

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

    Tester Connection
    Wiring Color
    Terminal Description
    Condition
    Specified Condition
    E36-18 (IG) - E36-17 (E)
    B - W-B
    Engine switch power supply
    Engine switch on (IG)
    11 to 14 V
    E36-18 (IG) - E36-17 (E)
    B - W-B
    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
    If the result is not as specified, the ECU may have a malfunction.

CHECK ID CODE BOX (IMMOBILISER CODE ECU)

B113402E01

  1. Disconnect the E22 ECU connector.

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

    Tester Connection
    Wiring Color
    Terminal Description
    Condition
    Specified Condition
    E22-1 (+B) - E22-8 (GND)
    GR - W-B
    Battery power supply
    Always
    11 to 14 V
    E22-8 (GND) - 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 E22 ECU connector.

  4. Measure the pulse according to value(s) in the table below.

    Tester Connection
    Wiring Color
    Terminal Description
    Condition
    Specified Condition
    E22-3 (LIN1) - E22-8 (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.

CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

B118684E05

  1. Disconnect the E39 ECU connector.

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

    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.

    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.