Saab 9-3 1.9 Tid 2006 - No comms, no crank - Fixed #
Posted by Glen Strachan on July 30, 2014, 5:30 pm
Year of Manufacture *: 2006 Engine Size and Code *: 19 Tid ( Optional ) Scanner Used: kTS
I have a Saab recovered in non runner having already had a new ignition switch fitted elsewhere. I had no comms with pcm , non start , no crank . I removed and tested Main Relay and starter relay and all were good. If I ground pin 86 of the starter relay it will crank but not start. Ecu lives under o/s/f wing and having checked power supply, I had no voltage to it - all the pins look a little green, but nothing horrific . So I plugged the ecu back in and all of a sudden I had communication back and the glow plug light on the IC flashes on for a second or so. Still no crank, but this time ground pin 86 and it runs. Going back to the ECU if I ground pin A70 it cranks, so I guess I am looking at an ecu fault but I am just a little nervous that I am missing the bigger picture - why didnt I have power supply ? Tbf I am going off a vauxhall vectra wiring diagram as I cant find the correct saab one *sigh* Any thoughts apreciated
Re: Saab 9-3 no coms no crank
Posted by aidan birley on July 30, 2014, 7:02 pm, in reply to "Saab 9-3 no coms no crank" Aidan Birley
Hi
I have had wires fail in the engine loom on these ( corroded through) in mine (both times ) it was the wire that controls the power relay.
symptom was non start & no comms
My be good to wiggle / load test wires to power relay
Cheers Aidan
Re: Saab 9-3 no coms no crank
Posted by Marc Roberts on August 3, 2014, 8:57 pm, in reply to "Saab 9-3 no coms no crank" Edited by board administrator August 5, 2014, 3:48 pm
Normal place for wire to be corroded/damaged is one of three places, right at ecu/where loom bends behind hp fuel pump or the most common is above bell housing.If my memory is any good the wire is brown with white trace.Hth Marc
on July 30, 2014, 7:02 pm, in reply to "