Sanity Check -Wire Harness and Code 12214 - Saab 900 Bulletin Board - Saabnet.com
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Sanity Check -Wire Harness and Code 12214
Posted by EAnderson [Email] (more from EAnderson) on Sat, 18 Jun 2016 19:18:51
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Hey all, need a sanity check before I tear into the wire harness to the LH2.4. My 91 turbo was having trouble starting and once started ran rough, CEL light came on briefly and went out, checked it and found code 12214 -Coolant temp signal incorrect. Per Bentley I checked the resistance at the coolant temp sensor and it seemed correct so I reconnected the wire and checked the signal at Pin 13 and pin 17(GND)at the LH. There was no resistance between pin 13 and pin 17. Next I checked for ground at pin 17 and that tested good, out of habit I also checked for continuity between pin 13 and 17 and the multi-meter indicated that they were connected, in effect pin 13 was grounded, I confirmed that pin 13 was grounded. Next I removed the connector at the temp sensor and found that pin 1 was not grounded and pin 2 was as it should be.(Bentley P371-67) I then checked continuity between pin 1 and 13 and got nothing, Pin 2 and 17 showed continuity as expected. So it seems that the wire between Pin 1 at the temp sensor and pin 13 at the LH has been cut at some point and is grounding on the frame, perhaps at the firewall?
So before I open up the wiring harness is this my best option at this point? Anything I overlooked? Is there a common point where this kind of break would occur like the fire wall? Any advice on getting behind the air intake?
Thanks
.
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