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Thread Title:

Series 60 codes


Created On Thursday September 03, 2015 16:27 Diesel Talk
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edroelle
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Joined: Feb 2010

Note Thursday September 03, 2015 16:27 View thread in raw text format
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I continue to have problems with my 97 Series 60, ECM III, in a motorcoach. (High coolant temperature or loss of boost.)

I will start with the question first. Suspecting a problem ECM, can I do a trial run by exchanging with a similar ECM ?? A friend has a similar 470 HP, 1997 engine, 1998 coach. The difference between the two is one has, and is programmed, for a jake brake, and the other has a transmission retarder. Can I switch ECMs and see if I get any codes, as would happen, with my ECM?

As background, the following describes the problems.

Most sensors have been replaced.

The problems are intermittent.

I use a Silver Leaf which takes ECM data every second shows it and records it. I have analyzed the info in detail. (1.5 million pieces of data !)
On occasion (once per day roughly), air inlet, coolant, and oil temp go bad (not accurate) together for 5-20 seconds
Example - Coolant temperature goes from 195 to 161 to 180 to 159 to 232 in 15 seconds. Mechanically, this is impossible - thus I expect I have an electrical problem
Oil pressure data appears OK (common ground with coolant temp +)
Transmission temp appears OK but readings fluctuate within 1.7 degrees constantly, not just when other temps show problem.

2nd problem, appears unrelated, is throttle position sensor or turbo boost
Example - 50% TPS with only 2 PSI turbo boost and no acceleration. I am dead in the water. (Keying off will correct.)
Occasionally, throttle does not show a return to 0, but rather 6% TPS, and keeps jake from operating. We can see no explanation for this.
While cruising with 0 TPS, TPS changes to 4% TPS - no throttle input. Temps and boost appear OK
With no throttle, I have driven, accelerated, and decelerated using cruise control.

Ed Roelle
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stump
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Note Saturday September 05, 2015 19:03 View thread in raw text format
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Ed, check the wire harness off if the ecm for any chafing . usually you will find a spot within about 18 inches.Your issue seems like it could be a connection issue.
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edroelle
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Note Wednesday September 09, 2015 15:32 View thread in raw text format
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Thanks,

I have installed an ECM that was built a month before mine. I plan a couple of 4 hour trips to see if I have a indication of problems. Based on that, I will disect the wiring harness. I will respond.

Ed
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heavyhaulerss
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Note Wednesday September 09, 2015 15:59 View users profile View thread in raw text format
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sounds like a ground wire issue. find the ground that is common to the sensors that are throwing sporadic codes.

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HEAVYHAULERSS
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