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Terminals Of Ecu

  1. CHECK SEAT BELT CONTROL ECU 
    Fig 1: Identifying E41 And E42 Connector End Views Terminals
    G05635288Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E41 and E42 seat belt control ECU connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      VOLTAGE AND RESISTANCE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E42-8 (IG1) - Body ground G - Body ground Seat belt control ECU power source line Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      E41-7 (+B) - Body ground R - W-B Seat belt control ECU power source line Always 11 to 14 V
      E41-8 (PGND) - Body ground W-B - Body ground Seat belt control ECU ground line Always Below 1 Ω

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

    3. Reconnect the E41 and E42 seat belt control ECU connectors.
    4. Measure the voltage according to the value (s) in the table below.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E41-2 (MOR+) - E41-8 (PGND) L - W-B Passenger side seat belt motor power source line Engine switch on (IG) 4 to 8 5 V
      E41-3 (MOL+) - E41-8 (PGND) GR - W-B Driver side seat belt motor power source line Engine switch on (IG) 4 to 8 5 V
      E41-1 (MOR-) - Body ground B - Body ground Passenger side seat belt motor ground line Engine switch on (IG) 4 to 8 5 V
      E41-4 (MOL-) - Body ground W - Body ground Driver side seat belt motor ground line Engine switch on (IG) 4 to 8 5 V

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

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