IACV explained

[SportsterDoc]

Hi Doc, thank you again for all of your help. I don't mean to sound dumb, but can you please clarify how to perform step #3? I assume the ECM is somewhere beneath the seat, and can be easily accessed, or you would have provided instructions for how to locate it. A picture of the disconnected ECM 33 pin that shows the locations of A6, A17, A16, and A7 would be worth a thousand words. Does the ECM 33 pin need to be disconnected from the ECM to perform these resistance tests?

My bike has never exhibited an error code, except when I unplugged the EOT sensor; do I need to perform step #1?

I will perform these tests, but first I would like to clean all of the connections you described in a different post (or maybe it was a PM?). I can clean each connector and perform a test separately, if this would help generate information for the team. I would have to ride the bike about 10 miles after each connector was cleaned to perform any kind of a meaningful test, so it would take me one day between each test. Please advise.

Thanks again to the entire team. I can't remember the last time I have seen such incredible team work!

3. Check continuity to ECM, from disconnected ECM 33 pin connector to disconnected IACV 4 pin connector
Positions are numbered with locking tab up:
ECM A6 black/yellow to IACV connector postion 1 (left)
A17 black/red, position 2
A16 black/blue, position 3
A7 black/orange, position 4 (right)

A sketch of ECM connector is on page 5-41 of FSM and the details of section 3, including isolating the ECM connector to IACV connector.

The ECM is under the fuel tank, per FSM 17-2 diagram.

Hi Doc, thank you again for all of your help. I don't mean to sound dumb, but can you please clarify how to perform step #3? I assume the ECM is somewhere beneath the seat, and can be easily accessed, or you would have provided instructions for how to locate it. A picture of the disconnected ECM 33 pin that shows the locations of A6, A17, A16, and A7 would be worth a thousand words. Does the ECM 33 pin need to be disconnected from the ECM to perform these resistance tests?

My bike has never exhibited an error code, except when I unplugged the EOT sensor; do I need to perform step #1?

I will perform these tests, but first I would like to clean all of the connections you described in a different post (or maybe it was a PM?). I can clean each connector and perform a test separately, if this would help generate information for the team. I would have to ride the bike about 10 miles after each connector was cleaned to perform any kind of a meaningful test, so it would take me one day between each test. Please advise.

Thanks again to the entire team. I can't remember the last time I have seen such incredible team work!

Need to, no, but it would be interesting to know if a 29-1 code was ever set

Hi Doc, thank you again for all of your help. I don't mean to sound dumb, but can you please clarify how to perform step #3? I assume the ECM is somewhere beneath the seat, and can be easily accessed, or you would have provided instructions for how to locate it. A picture of the disconnected ECM 33 pin that shows the locations of A6, A17, A16, and A7 would be worth a thousand words. Does the ECM 33 pin need to be disconnected from the ECM to perform these resistance tests?

My bike has never exhibited an error code, except when I unplugged the EOT sensor; do I need to perform step #1?

I will perform these tests, but first I would like to clean all of the connections you described in a different post (or maybe it was a PM?). I can clean each connector and perform a test separately, if this would help generate information for the team. I would have to ride the bike about 10 miles after each connector was cleaned to perform any kind of a meaningful test, so it would take me one day between each test. Please advise.

Thanks again to the entire team. I can't remember the last time I have seen such incredible team work!

When you disconnect the IACV, if it looks sanitary, you may not need to do anything. If you see any signs of corrosion or crud, then contact cleaner and perhaps a soft tooth brush would be helpful. Same with ECM connector. Both are sealed connectors...so, main concern may be a damaged/tweaked contact.

If the IACV stepper is cycling (stepping/attempting to step) then wire continuity is not likely an issue...unless a break makes contact intermittent.

First recommended step is to simply disconnect IACV, inspect wires and contacts, clean as appropriate, then reconnect and go for a ride.