Mechanic talk

[iamupser]

Does anybody here know the cure for the "retarder" fault with the Wabco ABS on Workhorse?

I would replace the complete ABS unit (hydraulic and electronic module). I think I've had that before. The district manager has to put in a special parts requisition to get parts otherwise they switch the order over to the ABS pump motor automatically.

 

[1BROWNWRENCH]

Already tried that and the computer. Somehow the computer says it detects a load on the pin for the nonexistent retarder and
"learns" it, so from then on it expects it to be there and throw the light. I think actually a reflash of the computer is in order. ABS still works, of course.

 

[1BROWNWRENCH]

I get notices on the Allison TCU all the time about the filter, but it's just the "prognostics" function an I just reset it with the SBDT.

 

[1BROWNWRENCH]

We have a lot of retarders working in our building. The only thing to fix that is to fire them all.

Believe me, if I was in charge...

 

[Gear]

We never got our Meritor Wabco software back after our laptop was updated. We got all those ABS green codes, I refuse to use telematics codes for troubleshooting. Give me the proper software for diagnostics or friend!$k off.

 

[iamupser]

I can't stand it when TSG takes our computer for "updates". It takes another 6 months to get it to work again. I feel like telling them it's lost or can't find it when they come looking for it.

 

[1BROWNWRENCH]

I can't stand it when TSG takes our computer for "updates". It takes another 6 months to get it to work again. I feel like telling them it's lost or can't find it when they come looking for it.

It took a year and a half to even get one at my new center. Another 9 months after that and it is finally fully functional.

 

[1BROWNWRENCH]

We never got our Meritor Wabco software back after our laptop was updated. We got all those ABS green codes, I refuse to use telematics codes for troubleshooting. Give me the proper software for diagnostics or friend!$k off.

Telematics these days tells me something accurate and useful maybe 50% of the time.

 

[1BROWNWRENCH]

I just really don't give a rip about the telematics. There's so many other more important things to deal with in my 8 hours.

 

[Alexcross774]

Already tried that and the computer. Somehow the computer says it detects a load on the pin for the nonexistent retarder and
"learns" it, so from then on it expects it to be there and throw the light. I think actually a reflash of the computer is in order. ABS still works, of course.

Try this. Works some of the time.

 

[Alexcross774]

I get notices on the Allison TCU all the time about the filter, but it's just the "prognostics" function an I just reset it with the SBDT.

You probably know this, but you can reset both the filter and fluid alerts without the SBDT. There is a sequence with the shifter that clears it. It's in the troubleshooting guide and the owners manual I believe.

 

[iamupser]

You probably know this, but you can reset both the filter and fluid alerts without the SBDT. There is a sequence with the shifter that clears it. It's in the troubleshooting guide and the owners manual I believe.

I like carrying the laptop over to the package cars, makes it look high tech!

 

[iamupser]

Try this. Works some of the time.

Great tip! Good find!

 

[1BROWNWRENCH]

I've been dying to stomp out this issue. Hope it works.

 

[wayfair]

Do you work with the CNG 144xxx series?

Issue with mine is that when accelerating and approaching 30 mphs, the pc acts like it's not getting enough fuel, and loses power until it shifts to the next gear.

my mechanic tells me he can't "replicate the problem"

 

[1BROWNWRENCH]

Do you work with the CNG 144xxx series?

Issue with mine is that when accelerating and approaching 30 mphs, the pc acts like it's not getting enough fuel, and loses power until it shifts to the next gear.

my mechanic tells me he can't "replicate the problem"

Sorry, I do not. Perhaps it needs a new filter for the fuel. They do exist.

 

[1BROWNWRENCH]

You probably know this, but you can reset both the filter and fluid alerts without the SBDT. There is a sequence with the shifter that clears it. It's in the troubleshooting guide and the owners manual I believe.

Who has time to read the owners manual?

 

[Gear]

Sorry, I do not. Perhaps it needs a new filter for the fuel. They do exist.

I agree. And if it has 2 filters, replace them both. I see guys replace the (diesel engine) secondary (davco) filter and never replace the primary filter.

 

[1BROWNWRENCH]

Getting the 904 to restart after changing both can be a PITA.

 

[1BROWNWRENCH]

Strange there doesn't seem to be an SIRD for a lot of cars when it comes to fuel filters. I've acquired some from other centers that hadn't gotten one in nearly 6 years. Wouldn't go over 50 mph unloaded.