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Topic: Check engine light on for seconds, engine idles and comes back to no (Read 616 times) previous topic - next topic
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Check engine light on for seconds, engine idles and comes back to no

Yahoo Message Number: 78509
Cummins 400 ISL 14000 miles, check engine light goes on for seconds, the engine goes into idle, no throttle, but comes back as soon the check engine light goes off.
The engine diagnostic system shows no error code.
Using the cummins software we found

error code 132 - Low voltage detected at throttle position signal pin 30 of the OEM harness error code 431 - Idle validation signals on pins 25 and 26 of the OEM harness indicate voltage detected simultaneously on both pins or no voltage detected on both pins error code 432 - Idle validation signal at pin 26 of the OEM harness indicates that throttle is at the idle position when the throttle position signal at pin 30 is not at the the idle position ... or... idle valiadtioin signal at pin 26 of the OEM harness indicates the throttle is not at the idle position when the throttle position signal at pin 30 of the OEM harness indicates is at the idle position.
error code 241 - vehicle speed signal on pins 8 and 18 of the OEM harness has been lost.

Did somebody have a similar problem? Show the different error codes for the same problem that the ECM goes crazy? Or is it a simple wiring connection problem?

Hermann Robels

2007 Inspire # 52006

Re: Check engine light on for seconds, engine idles and comes back t

Reply #1 –
Yahoo Message Number: 78560
Have had this happen to many of my Cat Diesels! Learnd this the hard way, First look for green corrosion and Battery Tremibnals and all wiring harness connectors clean up as needed, Sonetime the fix was unplug and re pulg connectoer using the laptop. Keep us Pusted! Ken Retired Cat tech! 99Allure 30356.
 

Re: Check engine light on for seconds, engine idles and comes back t

Reply #2 –
Yahoo Message Number: 78564
Hermann- I'm guessing you have Teleflex adjustable pedals; the fuel rate command for the 'gas' pedal on this fuel/brake pedal assembly requires full clean signal, so previous posts about checking wiring is to the point. One truly obscure posibility is when CC made up the OEM harness plug that goes to ECM that the relevant pins are not fully seated (they have to fully 'snap' into place to assure constant positive contact); only way to check this is unplug OEM plug & inspect.
However, if no joy there you will need to do some diagnosis on the pedal itself. See http://www.irv2.com/forums/f104/accl-position-error-99481.html for info on diagnosing the Teleflex 6 wire setup.
Mike



"Hermann" wrote:

Cummins 400ISL 14000mi, check engine light on for seconds, the engine goes to idle, no throttle, comes back as soon the check engine light goes off. Engine diagnostic system shows no error code. Using the cummins software we found error code 132 - Low voltage detected at throttle position signal pin 30 of the OEM harness error code 431 - Idle validation signals on pins 25 and 26 OEM harness indicate voltage detected simultaneously on both pins or no voltage detected on both pinserror code 432 - Idle validation signal at pin 26 OEM harness indicates that throttle at idle position when the throttle position signal at pin

30 is not at the the idle position ... or... idle validation signal @ pin 26 OEM harness indicates the throttle is not at the idle position when the throttle position signal at pin 30 of the OEM harness indicates is at the idle position.error code 241 - vehicle speed signal on pins 8