PCM and TAC module
Thread Starter
1st Gear
Joined: Jul 2016
Posts: 1
Likes: 0
PCM and TAC module
loss of comm when tac module and PCM are both connected. Have replaced TAC module, tested tac module on another vehicle, have replaced pcm, have load tested PAGS. Really at a loss here. can unplug tac and vehicle will start, but no throttle(obviously) but as soon as the two comm lines and ground are connected i lose comm and engine dies.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Well,,,,,,,,,,,,,,,,, If it were me,,, I would take the wiring harness and connectors apart and look for shorted/damaged wires/pins.
Go from there..
Do a continuity check on the serial data wire between the tac and PCM
BC
Go from there..
Do a continuity check on the serial data wire between the tac and PCM
BC
Last edited by Bill Curlee; Jul 29, 2016 at 02:44 PM.
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
Follow Bills instruction. HE can get you up and running!!!
