940se OBD diagnostic problem

Discussion in 'Volvo 940' started by Bilko, Aug 3, 2003.

  1. Bilko

    Bilko Guest

    1993 2.0l model... my father-in-law's car.

    Car wouldn't start so decided to read the ECU codes for a clue.

    When he ran the OBD diagnostics, he got a 1-1-1 on port 6 but when he tried
    on port 2 he got nothing -- no flashes at all. The red LED lights up when
    the button is pressed but there are no subsequent flashes.

    Anyone came across this before.... is this symptomatic of a faulty ECU?
    Bilko, Aug 3, 2003
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  2. Bilko

    Tim.. Guest

    i would say...the ecu isnt powered up...main relay?

    Tim.., Aug 3, 2003
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  3. Bilko

    Bilko Guest

    But surely if the ECU returns flashes for the port 6 (ignition) diagnostic,
    it must be powered up?
    Bilko, Aug 3, 2003
  4. Bilko

    Mike F Guest

    This happened to my brother in his 1990 740 Turbo - the car quit on the
    highway with no warning. The ignition returned 1-1-1, and there was no
    response from the fuel. The ECU was dead. Of course if the ECU wasn't
    getting power, you'd have a similar situation.
    Mike F, Aug 5, 2003
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