Fault code pulling - 1988 5000 TQ

[Denis]

  You said ''The diode goes "out" for a flash and "on" 
  for a pause.  ''


  Even if plug under the dash ? as SJM or Bentley mentioned it ?

  My 200TQ is very hard to start when cold, most of the tiem it does not start.
  So i plugged a led on the under dash connector and pulled 2312 code, which means coolant temperature sensor.
  On for a flash and off for a pause.

  Ðenis
    ----- Original Message ----- 
    From: Phil Payne 
    To: quattro at audifans.com 
    Sent: Friday, January 28, 2005 3:21 AM
    Subject: Re: Fault code pulling - 1988 5000 TQ


    >  Also, can anyone verify that the two terminals on the top of the FP 
    relay triggers the sequence.

    I don't know specifically about US cars, but the following is true for the 
    UK MAC-12 cars (1B and MB) and should be true for the MAC-11 cars.

    Regardless of whether diagnostic connectors are present, the fuel pump 
    fuseholder can be used to trigger codes.

    Sexy bit - if the check engine light is non-functional, you can read the 
    codes from the fuseholder using a diode check light. The only issue is that 
    light is dark and dark is light,  The diode goes "out" for a flash and "on" 
    for a pause.  

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