transmission codes
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1st Gear
Joined: Jun 2023
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transmission codes
Hi everyone, first time posting on here. I have a 95 300 efi. After clearing codes no cel while in park but cel comes on after driving. Just checked the codes and got a 622, 626, 629, and 654. Ive read that it could be a pcm problem or transmission issue. Anyone know where i should start to diagnose it?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,730
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From: SE Florida
You should start by disconnecting the harness at the PCM and the transmission passenger side.
Probe the BACK of each connector to check the circuits for each shift solenoid and the coast clutch solenoid (those are the ones with codes) for continuity from one connector to the other, and for continuity from each of those wires to the positive battery post and separately to the negative battery post.
There should be continuity from one connector to the other, but now to positive or negative.
Probe the BACK of each connector to check the circuits for each shift solenoid and the coast clutch solenoid (those are the ones with codes) for continuity from one connector to the other, and for continuity from each of those wires to the positive battery post and separately to the negative battery post.
There should be continuity from one connector to the other, but now to positive or negative.
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