Title: 98 u295 unit 5219 Allison retarder issue-not functioning
Post by: mwagner2004 on March 12, 2025, 12:46:56 pm
Post by: mwagner2004 on March 12, 2025, 12:46:56 pm
8.3 manual p-pump
Allison mh-3000
D12112 Allison code for tps, king throttle with filter wire cut and unit sealed by I think Keith, and unable to clear code, no trans retarder operation, everything else works including cruise
This coach was Dave Cobb coach that many of you will recognize as a mid-entry 36' model
Allison mh-3000
D12112 Allison code for tps, king throttle with filter wire cut and unit sealed by I think Keith, and unable to clear code, no trans retarder operation, everything else works including cruise
This coach was Dave Cobb coach that many of you will recognize as a mid-entry 36' model
Title: Re: 98 u295 unit 5219 Allison retarder issue-not functioning
Post by: Michelle on March 12, 2025, 02:49:33 pm
Post by: Michelle on March 12, 2025, 02:49:33 pm
Take a look at this post and then see whether or not you have the same bolt
Q about throttle position sensor (https://www.foreforums.com/index.php?topic=44775.msg454172#msg454172)
Q about throttle position sensor (https://www.foreforums.com/index.php?topic=44775.msg454172#msg454172)
Title: Re: 98 u295 unit 5219 Allison retarder issue-not functioning
Post by: Michelle on March 12, 2025, 02:57:00 pm
Post by: Michelle on March 12, 2025, 02:57:00 pm
A slightly different problem, but again a sheared bolt on the TPS was the cause
Inland Truck Parts Company, Fargo, ND, for Allison Problem (https://www.foreforums.com/index.php?topic=21413.0)
Inland Truck Parts Company, Fargo, ND, for Allison Problem (https://www.foreforums.com/index.php?topic=21413.0)
Title: Re: 98 u295 unit 5219 Allison retarder issue-not functioning
Post by: Michelle on March 12, 2025, 02:59:40 pm
Post by: Michelle on March 12, 2025, 02:59:40 pm
D12112 Allison code for tps,
Likely 21-12, THROTTLE POSITION SENSOR, FAILED LOW
Allison Transmission Help Files (https://wiki.foreforums.com/technical:transmission:start)
Allison Codes:
Same code as Dave Stevens posts about in the Inland Truck Parts thread
Title: Re: 98 u295 unit 5219 Allison retarder issue-not functioning
Post by: Barry & Cindy on March 12, 2025, 06:58:14 pm
Post by: Barry & Cindy on March 12, 2025, 06:58:14 pm
Not following this problem, but wanted to share that King Throttle Control usually has an electronic Allison Throttle Position Sensor built in, where one of the King Control cable plugs connects to the Allison computer to notify Allison were the throttle is positioned. In this case there is no mechanical Allison TPS installed.
Title: Re: 98 u295 unit 5219 Allison retarder issue-not functioning
Post by: Doug W. on March 12, 2025, 07:05:49 pm
Post by: Doug W. on March 12, 2025, 07:05:49 pm
Yes, if coach is operating with King throttle control no mechanical TPS.
I cleared similar codes by replacing retarder 12 volt relay switch behind driver side lower kick panel.
Might want to contact Brent Delfel @ Advance Diagnostics #501-500-3611 he is the go to guy for King Control.
I cleared similar codes by replacing retarder 12 volt relay switch behind driver side lower kick panel.
Might want to contact Brent Delfel @ Advance Diagnostics #501-500-3611 he is the go to guy for King Control.