ECU, Digifant II - Damage/Failure Prevention
89VW02SUBJECT:
Digifant II E.C.U. failure (Supercedes 88-02, September 30, 1988)
GROUP
24
NUMBER
89-03 February 28, 1989
MODEL(S):
Golf, Jetta, M.Y. 1988
Digifant II Electronic Control Unit
Some precautions are necessary when servicing DIGIFANT II equipped vehicles. The electronic control unit (ECU) will be electronically damaged when the following conditions are present:
^ shorting out the ignition terminal # 1 to ground during engine adjustment by means of a small screwdriver, paper clip, or nail.
^ a floating ground connection to the ECU'S terminals # 13 and # 19.
(check for a good ground connection at the following locations: Intake Manifold, cooling outlet fitting at engine block, battery minus post where applicable)
^ disconnecting idle stabilizer valve when engine is running.
^ measuring current draw (mAmp) of the idle stabilizer valve with digital multimeter set on the voltage scale.