mikec03 Posted December 30, 2015 Share Posted December 30, 2015 The duty c solenoid has started to fail on my 95 with 150K miles. It stops for awhile and I get the dreaded 16 flashes on the AT Temp light. But it then starts to work for a while. This has been going on for a 1 1/2 months. It's working now for example. I've put in the fuse and it's illuminating the FWD light, for example. I verified that it's trouble with the duty c by pulling the code [which is not easy by the way] Does this sound like a mechanical or electrical problem? I'v changed the trans fluid enough so that the fluid now is pristine. Any ideas. Link to comment Share on other sites More sharing options...
wtdash Posted December 30, 2015 Share Posted December 30, 2015 (edited) With the FWD fuse installed/inserted in fuse holder, do you have FWD ONLY or does the torque bind go away (assuming it has TB)? If so, it's mechanical. If the fuse makes NO difference in the AWD funtion than it's electrical. TD codes: Trouble Code Table Trouble Code 11 Duty solenoid A 12 Duty solenoid B 13 Shift solenoid 3 14 Shift solenoid 2 15 Shift solenoid 1 21 ATF temp sensor 22 Atmospheric sensor 23 Engine revolution signal 24 Duty solenoid C 25 Engine torque control signal 31 Throttle sensor 32 Vehicle speed sensor 1 33 Vehicle speed sensor 2 Edited December 30, 2015 by wtdash Link to comment Share on other sites More sharing options...
CNY_Dave Posted December 30, 2015 Share Posted December 30, 2015 The computer can't detect a mechanical problem with the solenoid valve, it can only detect a short or open connection. It could be a bad connection, there's a the connector at the TCU, then the one at the back of the engine right near the dogbone link. Link to comment Share on other sites More sharing options...
mikec03 Posted December 31, 2015 Author Share Posted December 31, 2015 I found a post in 2011 on this forum where a guy had the same problem [an intermittent FWD failure]. The guy changed his duty c solenoid but the intermittent FWD failure wasn't fixed! One of the posters said that he found a lot of the TCM's had a transistor failure for the wiring to the duty c solenoid. So I bought a used TCM which I will install in a week. Of course the problem still could be in the external wiring or the solenoid itself. PS The trouble code for the duty c only shows an electrical problem. There is nothing in the wiring to the duty c that would allow the TCM to diagnose a stuck or plugged valve. So its got to be an electrical problem. Link to comment Share on other sites More sharing options...
CNY_Dave Posted January 1, 2016 Share Posted January 1, 2016 A burnt TCU solenoid drive transistor is usually visible, you can open it and look. Link to comment Share on other sites More sharing options...
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