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Ok, I'm back (foot is still in the cast, but I can walk)
Here are the pictures of the ECU removed. HS.2 (not 27.1 )
Visual examination doesn't suggest anything wrong.
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What am I suppose to check?
If needed right click on picture then open in another page, it gives double size.
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Throttle body cleaning issues EPIC Volvo saga...RESOLVED!!
Re: Throttle body cleaning issues
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S60 2002 180K miles looks and runs like new (except when sulking)
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precopster
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CRC make an electrical contact cleaner. If you use throttle body or brake parts cleaner you risk breaking down plastics so I would definitely go for the CRC product.
The aim here is to check that each and every pin is protruding by the same amount and has no corrosion. As they are difficult to look at properly I would just give them all (males and females) a good scrub with a toothbrush soaked in the CRC product then give them all a final spray.
Also putting the controller in and out repeatedly will help to scrape any corrosion especially on the females you can't reach.
The aim here is to check that each and every pin is protruding by the same amount and has no corrosion. As they are difficult to look at properly I would just give them all (males and females) a good scrub with a toothbrush soaked in the CRC product then give them all a final spray.
Also putting the controller in and out repeatedly will help to scrape any corrosion especially on the females you can't reach.
Current cars VW Transporter 2.5TDI, 2010 XC90 D5 R Design
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precopster
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That's the transmission computer. Won't hurt to clean it also.
I just had a customer come back with a 2004 XC 70 after battling P2111, P0221, P0121. P2135, P0638 (all throttle body codes) We had already replaced MAF and TB with new Bosch units.
One thing was peculiar; her car also reported a CEM-1D04 which is ECM faulty software. The ECM software had already been reloaded by an indie garage.
Just today I removed her ECM and cleaned the contacts thoroughly as per jimmy's recommendation for this type of problem.
The CEM-1D04 is now GONE!! I drove it for half an hour and stopped/started it at least 10 times and rescanned; no codes. This looks promising for you also. Hope it works for you as well.
Just watch for bent pins before placing it back in the car as the toothbrush can be a little physical with the pins.
I've attached a really bad 2 dimensional impression I drew of an ECM pin. The yellow area is the scrape area or contact area of the female spade connector. This is typically where the factory coating gets scraped to reveal the brass/copper metal pin. As you can't see this side of all the pins you are mostly guessing at whether they have corrosion. The females on the car are of course totally hidden by the plastic housing, so the strategy is to try and use the toothbrush as well as spray them.
I just had a customer come back with a 2004 XC 70 after battling P2111, P0221, P0121. P2135, P0638 (all throttle body codes) We had already replaced MAF and TB with new Bosch units.
One thing was peculiar; her car also reported a CEM-1D04 which is ECM faulty software. The ECM software had already been reloaded by an indie garage.
Just today I removed her ECM and cleaned the contacts thoroughly as per jimmy's recommendation for this type of problem.
The CEM-1D04 is now GONE!! I drove it for half an hour and stopped/started it at least 10 times and rescanned; no codes. This looks promising for you also. Hope it works for you as well.
Just watch for bent pins before placing it back in the car as the toothbrush can be a little physical with the pins.
I've attached a really bad 2 dimensional impression I drew of an ECM pin. The yellow area is the scrape area or contact area of the female spade connector. This is typically where the factory coating gets scraped to reveal the brass/copper metal pin. As you can't see this side of all the pins you are mostly guessing at whether they have corrosion. The females on the car are of course totally hidden by the plastic housing, so the strategy is to try and use the toothbrush as well as spray them.
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- ECM Pin jpeg.JPG (33.04 KiB) Viewed 2232 times
Current cars VW Transporter 2.5TDI, 2010 XC90 D5 R Design
Done
I cleaned both male /female. It looked like new, bery clean.
I installed the CMU back. Started the engine (after a 1 minute key on no ignition )
A lot of bing bang (as if you have some sheets of metal colliding) then the same oscillating rev story!
NO CHANGE.
Here are the readings
Something is wrong with ME.
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I cleaned both male /female. It looked like new, bery clean.
I installed the CMU back. Started the engine (after a 1 minute key on no ignition )
A lot of bing bang (as if you have some sheets of metal colliding) then the same oscillating rev story!
NO CHANGE.
Here are the readings
Something is wrong with ME.
.
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Unselected CRC 06-19 .pdf- Unselected CRC
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S60 2002 180K miles looks and runs like new (except when sulking)
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precopster
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Obvious question but necessary. Was battety disconnected while removing/re-inserting the ECM?
Do you now have more errors than before?
You have a lot of CEM errors.
Do you now have more errors than before?
You have a lot of CEM errors.
Current cars VW Transporter 2.5TDI, 2010 XC90 D5 R Design
Yes, the battery is disconnected almost all the time. Except when I am ready to ignite the engine.
And yes I realized I had more errors then before.
And all I wanted was to clean the PCV and why not, while I'm there, clean the TB as well.
Two months without a car!
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And yes I realized I had more errors then before.
And all I wanted was to clean the PCV and why not, while I'm there, clean the TB as well.
Two months without a car!
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S60 2002 180K miles looks and runs like new (except when sulking)
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precopster
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Did you have the key at Pos II when reconnecting the battery? Most Volvo modules (especially CEM) don't start properly unless you follow this procedure.
Current cars VW Transporter 2.5TDI, 2010 XC90 D5 R Design
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Yes the key is in position II before the jolt runs.
As I said, it starts with couple of bangs then goes into that oscillation rev or it dies after 3-5 seconds.
I tried to record the sound /video I can't upload mp4 format.
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Yes the key is in position II before the jolt runs.
As I said, it starts with couple of bangs then goes into that oscillation rev or it dies after 3-5 seconds.
I tried to record the sound /video I can't upload mp4 format.
.
S60 2002 180K miles looks and runs like new (except when sulking)
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precopster
- Posts: 7543
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The codes/errors are more crucial than how it sounds, and it's not a known way to diagnose unless you have no codes.
Try another reconnect of the battery to see if the CEM didn't start properly. Next I would pull ECM and check for proper seating and/or bent pins.
I've heard of corrupted/faulty CEMs causing no-start or poor running situations. After trying above I would try a reconnect of CEM (behind dash panel) to see if it's a corrosion issue. Failing that CEM may need replacement.
You could send to XeModex. Call them and see if they will assess it/test it before repair for a nominal fee.
Try another reconnect of the battery to see if the CEM didn't start properly. Next I would pull ECM and check for proper seating and/or bent pins.
I've heard of corrupted/faulty CEMs causing no-start or poor running situations. After trying above I would try a reconnect of CEM (behind dash panel) to see if it's a corrosion issue. Failing that CEM may need replacement.
You could send to XeModex. Call them and see if they will assess it/test it before repair for a nominal fee.
Current cars VW Transporter 2.5TDI, 2010 XC90 D5 R Design
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