ACR Troubleshooting Info
#1
#3
Well, I installed the solenoids into the heads. I also installed a wire harness from the electrical caddy to the solenoids. The harness provides power and it also had a wire that went to pin 15 on the ECM connector. My conclusion on the way it works is when you press the starter switch, pin 15 goes to ground and this completes the circuit to energize the ACR solenoid. The documentation that came with the SE ACR wire harness only depicted the harness installation, it did not discuss 'enabling' of the system. Can you provide more details on this process?
Note, that I have a T-Max ECM, Zippers told me it is compatible with the ACRs. However, I disconnected one of the ACR plugs. I inserted a piece of wire inserted into each socket to attach a voltmeter probe. I then hit the starter button (with the starter motor connector disconnected) and neither pin is going low, so I don't think pin 15 on the ECM is going low.
Note, that I have a T-Max ECM, Zippers told me it is compatible with the ACRs. However, I disconnected one of the ACR plugs. I inserted a piece of wire inserted into each socket to attach a voltmeter probe. I then hit the starter button (with the starter motor connector disconnected) and neither pin is going low, so I don't think pin 15 on the ECM is going low.
Last edited by harley_jeff; 05-12-2012 at 10:20 AM.
#4
Well, I installed the solenoids into the heads. I also installed a wire harness from the electrical caddy to the solenoids. The harness provides power and it also had a wire that went to pin 15 on the ECM connector. My conclusion on the way it works is when you press the starter switch, pin 15 goes to ground and this completes the circuit to energize the ACR solenoid. The documentation that came with the SE ACR wire harness only depicted the harness installation, it did not discuss 'enabling' of the system. Can you provide more details on this process?
Note, that I have a T-Max ECM, Zippers told me it is compatible with the ACRs. However, I disconnected one of the ACR plugs. I inserted a piece of wire inserted into each socket to attach a voltmeter probe. I then hit the starter button (with the starter motor connector disconnected) and neither pin is going low, so I don't think pin 15 on the ECM is going low.
Note, that I have a T-Max ECM, Zippers told me it is compatible with the ACRs. However, I disconnected one of the ACR plugs. I inserted a piece of wire inserted into each socket to attach a voltmeter probe. I then hit the starter button (with the starter motor connector disconnected) and neither pin is going low, so I don't think pin 15 on the ECM is going low.
#5
I didn't see any place to enable ACRs in the t-max s/w.
That is for the return. That is one mystery. On the power side, the new ACR +V leads gets power from the fuse energized from the system relay, which is only closed for a few seconds after the run switch is closed. I was taught that you close the 'run' switch, wait for the fuel pump to stop/light to go out and then hit the starter button. That does not lok like that is going to work with ACRs due to the 3 second window that have power. What is the correct sequence for starting the engine with ACRs? Is that how the system relay works?
That is for the return. That is one mystery. On the power side, the new ACR +V leads gets power from the fuse energized from the system relay, which is only closed for a few seconds after the run switch is closed. I was taught that you close the 'run' switch, wait for the fuel pump to stop/light to go out and then hit the starter button. That does not lok like that is going to work with ACRs due to the 3 second window that have power. What is the correct sequence for starting the engine with ACRs? Is that how the system relay works?
#6
I wish I could give you more info. I am running the factory computer w/sepst and the acr's were installed and enabled as per instructions that came with them. Mine seem to be opened with the start button but I never investigated as they worked as designed and have not failed to open.....yet. I will sometimes wait as you described and sometimes not wait for pump and it all seems to work fine.
#7
I wish I could give you more info. I am running the factory computer w/sepst and the acr's were installed and enabled as per instructions that came with them. Mine seem to be opened with the start button but I never investigated as they worked as designed and have not failed to open.....yet. I will sometimes wait as you described and sometimes not wait for pump and it all seems to work fine.
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#8
#9
I didn't understand that either - if they are not "enabled" pin 15 on the ECM is going to stay electrically 'open,' right? I disconnected the harness going to the rear ACR and with 12V placed across the two pins the solenoid closed and made a very distinctive sharp sound. So, I know the solenoid itself is working. The problem I believe I have is pin 15 on the ECM is never going to ground. The other question I have has to do with how the system relay works and why the ACR hot leads only stays at 12V for 3 seconds.
#10
I just looked at the sheet and it refers to pin 19 not 15 but this is the sheet I just read so I don't know if it is applicable to you or not. http://www.harley-davidson.com/en_US...ts/-J04441.pdfMaybe I am reading it incorrectly?