[jahumphries]

I read somewhere on here that sometimes the wires that run from the throttle body back into the ECU box go faulty and are misdiagnosed as a bad throttle body. I'm about to replace a (probably) faulty throttle body so I ordered a new wiring connector, as it was only about thirty bucks. However, messing with these wires isn't something I'm totally comfortable trying to figure out on my own. Anyone replaced these before?


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[Hounddogger]

Replace the ETM before you mess with the wiring...

 

[Seamus]

The wires that go into the etm connector itself are usually the ones people replace, so check those before you replace the ETM, since those aren't cheap. I had my etm be diagnosed as faulty, and even with a new one the car will act like it is bad again, and then act totally normal when I reset the battery. It is intermittent so I suspect it is the wiring

 

[jahumphries]

I bought both parts already. How exactly do I replace those wires? I traced them back to the ECU box. Do I have to remove the ECU?


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[qaz996]

Replace the ETM before you mess with the wiring...

One might clean the ETM before replacing it as well.

 

[jahumphries]

I have done all this. I need to know how to change the wiring.


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[Seamus]

I believe there is a kit Volvo sells that you can replace the etm connector. That is where it fails, not where it goes to the ecu.

Check out this thread where someone describes it http://volvospeed.com/vs_forum/topic/171112-2002-s60-etm-issue/

 

[jahumphries]

So if I understand correctly, I just have to cut the wires of the old connector and splice in the new wires and connector?

Just cut a few inches down from the connector and splice in the new one? That sounds a hell of a lot easier than having to route them all the way back to the ECU. Just gotta remember to number each wire before cutting! Thank you, this helps me immensely

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[Shamak]

Post revival.

Having similar issues. Cleaned my ETM, cleaned connectors and added Stabillant-22 on connectors for ECU and ETM. Thinking I may need to replace the connector to the ETM. How hard is this?

 

[Shamak]

Nevermind. It appears the actual fix is to solder a new connector. But the clean and cover with Stabillant -22 may have done the trick. Drove it around and no issues yet.


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[Shamak]

So, I replaced the wiring connector by soldering the wires. Problem solved.

Edit: problem is still there.

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[AdrianC]

So, I replaced the wiring connector by soldering the wires. Problem solved.

Edit: problem is still there.

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Did you find the solution?

 

[Eric T Johnson]

Look for sign of corrosion, or oxidation, on the ETM connector. You might need to use a light source and a magnifying glass to get a good look. If oxidation is found, the connection can be opened and closed repeatedly, and also given an application of an appropriate anti-oxidation paste, and then reassembled.

 

[chefricky]

I read somewhere on here that sometimes the wires that run from the throttle body back into the ECU box go faulty and are misdiagnosed as a bad throttle body. I'm about to replace a (probably) faulty throttle body so I ordered a new wiring connector, as it was only about thirty bucks. However, messing with these wires isn't something I'm totally comfortable trying to figure out on my own. Anyone replaced these before?


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I have waited years to find out how to put in the entire harness.

 

[Eric T Johnson]

The problem with replacing an "entire harness" is that a wiring harness will typically have many branches that go to various different locations in the car. During the manufacturing process, the harness is installed after the body has been welded up and painted, but before the various systems are installed, including hvac, interior lights, engine and transmission, instrument panel, interior panels, and seats. This means that the harness is buried in the structure of the car. You can see portions of the harness, including the plug connections, but much of it is not easily accessible. It is not so hard to repair a wire, or a bad connector. I had to replace a headlamp connector a few months ago, because the old one had become oxidized, and overheated. I think it took an hour.

 

[Shamak]

Did you find the solution?

I replaced the entire throttle harness and that fixed it.


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[Shamak]

The problem with replacing an "entire harness" is that a wiring harness will typically have many branches that go to various different locations in the car. During the manufacturing process, the harness is installed after the body has been welded up and painted, but before the various systems are installed, including hvac, interior lights, engine and transmission, instrument panel, interior panels, and seats. This means that the harness is buried in the structure of the car. You can see portions of the harness, including the plug connections, but much of it is not easily accessible. It is not so hard to repair a wire, or a bad connector. I had to replace a headlamp connector a few months ago, because the old one had become oxidized, and overheated. I think it took an hour.

My son pulled one off a p80 at the yard and replaced his with it.


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[Maraschino]

has anyone replaced the entire harness from ETM to ECM?

 

[pa75vette]

has anyone replaced the entire harness from ETM to ECM?

I’m about to….

 

[pa75vette]