I have a 1994 SHO 3.2ATX. Recently when starting the car the O/D light is on which means the O/D is off. When I push the O/D button it the light stays on and when I drive it there is NO O/D. But after driving a while I can push the button and the light will go out and the car will then go into O/D. Seems like it needs to warm up or needs to be driven a few miles. Sometimes I just start it and let it sit in the driveway and the light will stay on and after about 10 minutes I can push the button and it will go out. Sometimes when driving for a little while the light will go out by it's self and the O/D will work. Any suggestions? No codes.
Overdrive light on when cold
- Thread starter bluemoney
- Start date
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did you pull codes or are you just guessing there are no codes because the cel is not on?
it is possible you have a short in the little wire that runs up the shifter to the o/d off switch.
it is possible you have a short in the little wire that runs up the shifter to the o/d off switch.
msteiny
Active Member
What RPM's are you running and at what speeds? Sounds like its your tranny warming up then locking the torque converter.
More Problems
More problems. The overdrive light does not go off now at all. No CEL and tried to check codes with 2 different code scanners, they work on all my other Taurus SHO's but for some reason I don't know why the code scanners don't even start to read codes just sits there, never seen that before. The car starts and runs OK but of course no overdrive. Maybe ECU is bad or something pulling to much power. It is due for smog and might see if it passes but still cannot drive without OD. I have a California car and cannot find an ECU with my calibration code. Will a federal work and on this year were they different from fed to ca? Please any suggestions?
More problems. The overdrive light does not go off now at all. No CEL and tried to check codes with 2 different code scanners, they work on all my other Taurus SHO's but for some reason I don't know why the code scanners don't even start to read codes just sits there, never seen that before. The car starts and runs OK but of course no overdrive. Maybe ECU is bad or something pulling to much power. It is due for smog and might see if it passes but still cannot drive without OD. I have a California car and cannot find an ECU with my calibration code. Will a federal work and on this year were they different from fed to ca? Please any suggestions?
Cannot Get Codes
Thanks I'll try the paper clip, just need to remember how to do it. My cal. code is LJG. The wiring on the button is OK. Never did the paper clip will that just give me the codes and/or turn on the solenoids and fan? I guess it might be time to get the breakout box out.
Thanks I'll try the paper clip, just need to remember how to do it. My cal. code is LJG. The wiring on the button is OK. Never did the paper clip will that just give me the codes and/or turn on the solenoids and fan? I guess it might be time to get the breakout box out.
http://web.archive.org/web/20090917070939/http://www.shophoenixproject.com/eec/eec.htm
When the SPP site is up, direct link:
http://www.shophoenixproject.com/eec/eec.htm
When the SPP site is up, direct link:
http://www.shophoenixproject.com/eec/eec.htm
Found Code problem
Well one thing at a time. Tried paper clip still nothing. Found no continuity from brown wire at STI to pin 48 at ECU. Now need to run another wire or find out where broken in harness. I'll do that then go back to OD light on all the time problem. I work 3rd shift in California. Thanks I'll do this then OD.
Well one thing at a time. Tried paper clip still nothing. Found no continuity from brown wire at STI to pin 48 at ECU. Now need to run another wire or find out where broken in harness. I'll do that then go back to OD light on all the time problem. I work 3rd shift in California. Thanks I'll do this then OD.
Bad ECU
Found the problem with the OD light and not being able to get the codes the ECU is bad. I have a code LJG ECU in it now. I found a D4U1 and installed it and the OD light toggles great now and I can get the codes. I now need to figure out code 551 and the other thing is to figure out if the D4U1 is OK for California so it will pass smog. Does anyone know that or know how to find a LJG code ECU. I think the 551 is for the solenoid for the secondary's on the plenum.
Found the problem with the OD light and not being able to get the codes the ECU is bad. I have a code LJG ECU in it now. I found a D4U1 and installed it and the OD light toggles great now and I can get the codes. I now need to figure out code 551 and the other thing is to figure out if the D4U1 is OK for California so it will pass smog. Does anyone know that or know how to find a LJG code ECU. I think the 551 is for the solenoid for the secondary's on the plenum.
Ongoing Fun
I don't know either for 1994 ATX but I am going to use this one and I'll find out in about two weeks. I bought the car new. Anyway on both my 1990 MTX SHO's and my 92 they have 49 state/federal code ECU's and one for Calif. I have found the California coded ECU before for them. Maybe by 1994 Ford made the ECU's the same for all states. Now on to the IMRL 551 problem when I get home this morning.
I don't know either for 1994 ATX but I am going to use this one and I'll find out in about two weeks. I bought the car new. Anyway on both my 1990 MTX SHO's and my 92 they have 49 state/federal code ECU's and one for Calif. I have found the California coded ECU before for them. Maybe by 1994 Ford made the ECU's the same for all states. Now on to the IMRL 551 problem when I get home this morning.
Ongoing Fun Stuff
I bought the car new in CA. I am going to use the D4U1 and see how it works and if it passes smog in two weeks. I don't know if the 94 ATX ECU is the same for all states or not, maybe by 1994 Ford made them the same and not a special one for CA. cars. I do know on both my 1990 SHO MTX's the code is different for CA. and the other 49 states, also same thing for my 89 MXT and my totaled 92, but I have been able to find them. Anyway on to the IMRL code 551 problem when I get home this morning.
I bought the car new in CA. I am going to use the D4U1 and see how it works and if it passes smog in two weeks. I don't know if the 94 ATX ECU is the same for all states or not, maybe by 1994 Ford made them the same and not a special one for CA. cars. I do know on both my 1990 SHO MTX's the code is different for CA. and the other 49 states, also same thing for my 89 MXT and my totaled 92, but I have been able to find them. Anyway on to the IMRL code 551 problem when I get home this morning.
Ongoing More Fun
Well found another issue. My code 551 is IMRC. I checked the solenoid and good. The wiring from the solenoid to the breakout box pin 34 does not have continuity. My other SHO's have lg/p wire and a red wire on the plug and that is what the diagrams show. This plug for the solenoid has a y/w and a black or brown. Interesting enough the plug/connector for the ECU pin 34 has a lg/p. I cut back the wire loom as far as I wanted to and still no lg/p. Any suggestions might help. As a last resort I could cut the connector off and run/slice a wire from it to pin 34. I find it odd that the Ford factory diagrams and both my car manuals would be wrong. Is there another connector that is plugged in wrong? Thanks
Well found another issue. My code 551 is IMRC. I checked the solenoid and good. The wiring from the solenoid to the breakout box pin 34 does not have continuity. My other SHO's have lg/p wire and a red wire on the plug and that is what the diagrams show. This plug for the solenoid has a y/w and a black or brown. Interesting enough the plug/connector for the ECU pin 34 has a lg/p. I cut back the wire loom as far as I wanted to and still no lg/p. Any suggestions might help. As a last resort I could cut the connector off and run/slice a wire from it to pin 34. I find it odd that the Ford factory diagrams and both my car manuals would be wrong. Is there another connector that is plugged in wrong? Thanks
Self Inflicted
Well given enough time and patience, I like it when a plan comes together. I have four SHO's but only one ATX. Rebuilt the trans. then engine spun a rod bearing, rebuilt that and have only driven it a little to break-in. The OD light was a problem and no codes. All these problems were caused by me. I am 65 years old and have done a lot of work on SHO's, they are a challenge. Anyway I found the problem I connected the power steering connector to the IMRC solenoid and the IMRC connector to the power steering pressure sender. Well that caused the ECU to fail and gave me a 551 code. After looking at the prints and using the breakout box finally found it. Now no codes and secondary's open. Might have to get a new power steering pressure switch, we'll see. Anyway just goes to show you all that reading and testing, that you can do it. Hope this might help someone. Pay attention when removing things and take the time to make things.
Well given enough time and patience, I like it when a plan comes together. I have four SHO's but only one ATX. Rebuilt the trans. then engine spun a rod bearing, rebuilt that and have only driven it a little to break-in. The OD light was a problem and no codes. All these problems were caused by me. I am 65 years old and have done a lot of work on SHO's, they are a challenge. Anyway I found the problem I connected the power steering connector to the IMRC solenoid and the IMRC connector to the power steering pressure sender. Well that caused the ECU to fail and gave me a 551 code. After looking at the prints and using the breakout box finally found it. Now no codes and secondary's open. Might have to get a new power steering pressure switch, we'll see. Anyway just goes to show you all that reading and testing, that you can do it. Hope this might help someone. Pay attention when removing things and take the time to make things.
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