I'm trouble shooting why my CC is not functioning.
Has anyone had this issue that has ended up with a bad circuit in the retarder control?
No codes are coming up on the Allison diagnostics laptop.
Thanks, pc
Maybe your brake lights are on. That would keep the cc off.
If you have a vmspc, you can query the cruise status.
+1 on Tom's answer.
When we bought our coach, the CC was inop. The PO told us to check if the floor mat was stuck under the brake pedal.
It was (which kept the pedal "applied" just enough to light the brake lights).
Moved floor mat, problem solved!
pc,
I had intermittent CC for a year. Eventually traced to a bad connection at the engine.
Mike
2003 u295 6063
What year/engine. Depends on control system. Mechanical cummins use old air throttle or king controls.
A reference was made to a CC sensor(?) in the compartment under the driver seat (i'm still looking for it.)
I have replaced both pneumatic brake relays (left front compartment.)
Replaced parking sensor and horn relay sensor (behind the dash.)
No.. brake lights function properly.
Replaced the throttle and cam position sensor and picked up spare's.
Loose wire on the engine, mine is the M11 (which one was loose?)
I have not replaced the idle circuit sensor because it is not something that has
a history of being troublesome and it's not throwing a code (but it is next.)
The ECM is freshly rebuilt and the Allison is flawless (no codes.)
Just no CC and Hi-Idle. Everything thing else is thumbs up. pc
When my cruise control wasn't working, it coincided with the first time I used my VMSpc.
Not thinking that the VMSpc could actually tell my cruise control to disengage, I went so far as to attempt to make an appointment up near Sacramento, CA to get it fixed. They couldn't accommodate us, so we just dealt with it. Then, on a short trip, without the VMSpc connected, the cruise worked. During the trip home, we tested it with the VMSpc connected, and only after I deleted that gauge from the VMSpc, the cruise worked.
VMS.. you might be on to something. The PO must have had issues, mine is completely (cut) out of the loop.
Wonderful that all of the wiring to the thing is missing!!
Back to the schematic. pc