| Author |
Message |
    
Kinger
| | Posted on Friday, August 28, 2009 - 11:28 pm: | 
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In April I followed Gowindward's great right up and installed the 3 phase system in my S3. The stator died in Sept. 2008.
I followed the write up to a T. Then removed my clock and installed an analog voltage meter.
After all of this was done. The check engine light does not come on when the key is turned on. I went to the FSM and followed the diagnostics.
ECM connectors out, key one, I have continuity to ground on terminal 4 in the data connector.
Any thoughts on where to start looking? I am at a loss. |
Kinger
| | Posted on Monday, August 31, 2009 - 11:52 pm: |
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Bump. |
Blake
| | Posted on Tuesday, September 01, 2009 - 01:00 am: |
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You just made my brain hurt. |
Blake
| | Posted on Tuesday, September 01, 2009 - 01:00 am: |
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Did you check the light bulb/LED for the check engine light? |
Kinger
| | Posted on Tuesday, September 01, 2009 - 08:30 am: |
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The light bulb appears to be fine.
A little more detail (assuming this is why your brain hurt ):
Per the Service Manual I was to check continuity to ground on the data connector. This procedure calls for the ECM connectors to be disconnected from the ECM and the key to be turned on.
I have continuity to ground on pin 4 of the data connector. Per the SM this indicates a short to ground. Pin 4 is a grey wire, and appears to go to the fuel pump.
When the key is turned on (everything connected) the fuel pump does not prime the engine.
Thanks |
Blake
| | Posted on Tuesday, September 01, 2009 - 12:32 pm: |
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Sounds like your fuel pump circuit is shorting out somewhere. Isolate that? |
Kinger
| | Posted on Monday, September 07, 2009 - 11:39 pm: |
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Was able to secure some knowledgeable help this weekend.
The short to ground on pin 4 of the data connector was due to the kick stand switch being bypassed.
There was no power to the instrument cluster. Power in to the CEL was fine, but I had power going out the ground as well. Digging deeper showed that the ground was good going into the connector for the instrument cluster, but there was a break between the connector and the instruments.
Review of the wiring diagram showed that this circuit had its own ground and tied back through the data link connector. We tested this by grounding the data link pin 4 to the frame....and there were lights!
Instead of tearing apart the wiring bundle around the neck of the bike, I added a ground from the data link connector to the frame.
Thanks for your help. A couple more items to reinstall, and I can test ride! |
Blake
| | Posted on Tuesday, September 08, 2009 - 01:27 am: |
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Excellent diagnosis. Thanks for the follow-up. |
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'00 S3 No check engine light at key on