Lexus IS250 · Service Manual BODY

TERMINALS OF ECU

System information


CHECK MAIN BODY ECU RH
  1. Disconnect the RD and RK junction block connectors.

  2. Disconnect the J75 ECU connector.
    B107423E04

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

    Symbols (Terminal No.)
    Wiring Color
    Terminal Description
    Condition
    Specified Condition
    BECU (RK-5 ) - Body ground
    G-R - Body ground
    Battery (power supply)
    Always
    10 to 14 V
    GND1 (RD-17) - Body ground
    W-B - Body ground
    Ground
    Always
    Below 1 Ω
    GND2 (RD-7) - 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.

  4. Reconnect the RD and RK junction block connectors.

  5. Reconnect the J75 ECU connector.

  6. Measure the voltage according to the value(s) in the table below.

    Symbols (Terminal No.)
    Wiring Color
    Terminal Description
    Condition
    Specified Condition
    TSW (J75-2) - Body ground
    LG - Body ground
    Luggage compartment door main opener switch signal input
    Luggage compartment door main opener switch OFF
    10 to 14 V
    Luggage compartment door main opener switch ON
    Below 1 V
    TKUL (J75-3) - Body ground
    P - Body ground
    Luggage compartment door opener switch signal input
    Luggage compartment door opener switch OFF
    10 to 14 V
    Luggage compartment door opener switch ON
    Below 1 V
    If the result is not as specified, the ECU may have a malfunction.

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