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cannot clear 3-2-1 computer code - aux. relay 700 1990

posted by  Arthur on  Mon Sep 8 04:40 CST 2003
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last visit: Sat Aug 2 07:35 CST 2014
[RELATED]

'90 740 auto with Rex/Regina system, 260,000 km.

Fuel pump died couple weeks ago and was replaced. Car worked fine for maybe a week, then took long (~10 seconds) cranking time to start. Diagnostic code 3-2-1 pointed to auxiliary relay, so I swapped it out, also the fuel injector relay. Problem fixed, car starts well, runs well, wife happy.

But the 3-2-1 code keeps recurring. I also noticed the up arrow indicator light (overdrive) does not come on with all the others when I first turn on the ignition. Is this related?

I've wiggled connectors and cleaned up ground connections.

Any ideas where to look next? I've got a pollution test coming next month & would like to fix this before then.

As always, thanks. The advice here is unbeatable.






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