Calling all ETM experts Topic is solved

highmiles · Post by **highmiles** » 28 Dec 2019, 11:08

2001 S60 T5 manual transmission that I am rebuilding, for a more in depth background, see here: viewtopic.php?f=9&t=91919

As noted in that thread, is was predicted the ETM's life would be short, and that appears to be the case.

There are several codes, I believe the pertinent one is ECM-902A

I have pulled the ETM, it is a yellow label with a 2003 date code, likely that it was replaced early on I am guessing.

I tested the car harness and found 12v at the green wire, so I believe the ETM is getting the power it needs.

I hooked up the ETM to a battery (green wire positive, brown negative) and get what seems to be an abnormal test run. See the video.

I took voltages across the remaining connectors, here are the results:
1=pink
2=yellow/green
3=red/blue
4=violet
5=brown (ground)
6=green (12v in)

1-3 = 0 volts
1-4 = 1.164 volts
2-3 = 0 volts
2-4 = 1.922 volts

I surmise that the 0 volt readings indicate a break in an internal circuit.

Head to the junkyard? If I understand the FCP Euro article I can use any ETM from a turbo car, I am sure there is some age cut off, but that indicates 1999-2012 at least?
Take this ETM apart and upgrade with contact less? But wouldn't be surprised if that was not the issue.

Happy to run additional tests!

Thanks! John

highmiles · Post by **highmiles** » 28 Dec 2019, 14:33

Call off the hounds!

Back to mechanics, or electrics 101 for me.

I moved on to sorting some of the under hood electrical wiring while I waited for the next bright idea and in the process found... did you guess it???... the wire for the large ground at the front of the motor was a bit loose.

Could it be? Of course, all back together and running again, no codes! Well, I have a bad blinker bulb...

Back to the garage!

Post by **abscate** » 28 Dec 2019, 15:27

Second “ bad throttle body” caused by a bad ground this week!

Georgeandkira · Post by **Georgeandkira** » 30 Dec 2019, 06:01

Please tell us (meaning ME) where this ground wire is located. It's raining torrentially now so I can't lift the hood.

Post by **abscate** » 30 Dec 2019, 06:06

Georgeandkira wrote: ↑30 Dec 2019, 06:01 Please tell us (meaning ME) where this ground wire is located. It's raining torrentially now so I can't lift the hood.

It’s the main engine ground, I think under the starter. Big blue battery cable off the B- post.

Sean did his head job, started up and ran fine, then popped a ETS light in his 1999.

Fixed with a new blue negative terminal lug.

Good grounds, very important.