Here I am

Help! on the road need TPS adjustment info

Attention: TDR Forum Junkies
To the point: Click this link and check out the Front Page News story(ies) where we are tracking the introduction of the 2025 Ram HD trucks.

Thanks, TDR Staff

No overdrive issue!

KSB Temp Sensor Wiring?

Status
Not open for further replies.
We left on our annual Thanksgiving vacation yesterday. Drove 400 miles into the high Sierra's. About an hour into the drive the transmission kept dropping out od OD. It was intermintent the whole way up but enough of a problem I need to remedy it if I can. The cruise control, speedo etc works fine so I'm guessing its the TPS. This is the original TPS and I have never touched it. I have a volt meter and tools but I need an quick explanation in how to check and adjust. If there is anything else I should check or do let me know.



Thanks,



Jay
 
Go across the white and dark brown with your meter set on low voltage. The reading at idle should be from . 75 to 1. 0.



Check the connections on the TPS. Bend the small tabs back out to touch the pins in the TPS.



Also check the RPM sensor connections to. This will drop OD also. The female side of the connection has small tabs that are supposed to touch the male pins. But these little tabs like to bend in and not make contact properly. Use something small and bend the tabs back out. They are small and hard to see.



As a last resort. Check the plug on the PCM. The TPS wire is the 2nd terminal in the middle row from the front of the truck. The female socket likes to go out of round and cause a bad connection. If memory serves me right. It takes a 3/8's or a 10MM to remove the hold down bolt for the PCM plug.



I'll be watching. Let us know.
 
Thanks guys. I hope to be able to get to that today. Some friends showed up yesterday at noon and made us all Bloody Marys. Needless to say I never made it under the hood. :D



I'll let you know how it goes.
 
A lot of times the TPS is just dirty. you could probably just tap on it with the handle of a screwdriver and clear up the problem, or you can take it off and spray it with electric cleaner . it's worth a try anyway... .
 
Update.



I had a chance to work on the truck yesterday. The TPS at low throttle was 0. 83v and at full 3. 24v. There were no irratic spots so it appears the TPS is working properly at least with the engine off. I cleaned the TPS & CPS connectors and coated them with dielectric grease. I also set the low throllte position to 1. 1v. Not sure if that was the correct way to go but so far so good. I put 200 miles on yesterday with no problems.



J
 
How about the cruse ? the brake switch was making both my cruse and overdrive quit driving over bumps, so I tried lifting the brake pedle with foot and everything worked so when I got home I adjusted the sw. mount , 1 yr. later everything works fine. Just one more thing to check.
 
The higher the TPS voltage "at rest" the later the OD shift will happen. You should have an at rest value of "whatever" you choose and the overall increase above that value should be between 2. 25 vdc and 2. 75 vdc higher... . (that's over and above the value you set at rest)



pb...
 
Status
Not open for further replies.
Back
Top