02-03-2018, 02:50 AM
Preliminary to a further reply by Max:
1. The ECM has an internal 5 vdc poower supply for sensors. The black/yellow output is going to be less with engine off for two reasons:
a. With key on, but engine not running, there is electrical drain, especially from the headlight, sagging the voltage.
b. With engine running, the 3 phase alternator is recharging the battery at 13.8 to 14.8 volts.
2. I am remain concerned about a vacuum leak, such as the two vacuum hose fittings or a poor electrical connection. However, a poor connection should result in a DTC:
12-1 for fuel injector 1
13-1 for fuel injector 2
14-1 for fuel injector 3
15-1 for fuel injector 4
29-1 for IACV, etc.
3. The earlier suggestion about the evap canister purge is worth considering. Max may have a different approach, but I would be inclined to unplug the "evap purge control solenoid valve". Wires are bl/w to junction and bl/y to ECM A29. That position is labeled PCS on the factory schematics. No clue as to when the ECM triggers a purge (definitely engine running and full operating temperature, maybe minimum RPM?), but be interesting to take that out of the picture. This thread has a clue as to its location (easily seen in front of airbox from right side-easy to unplug electrical connection) and another clue for this saga: http://cb1100forum.com/forum/showthread.php?tid=2819. Dave, what was the result of post 5 (2 May 2014)?
The bl/w wire is switched power from a 12 wire, 14 position junction, so the purge solenoid has power to it with the key on. The bl/y goes from the purge solenoid to the ECM, which must close the circuit, for the solenoid to operate. If the bl/y is grounded (rubbing on metal?) it would operate the purge without the ECM. Unprogrammed operation or stuck open would create a vacuum leak/lean operation. When unplugged, power to it should result in an audible click...no click if stuck open.
The canister itself is so buried, I thought I did not have one, but with the center stand down, looking up forward and higher than the voltage regulator, popgun educated me on its location.
To take the evap system completely out of operation, for testing, you may want to simply block off the vacuum line from the purge valve to the throttle body assembly, by removing the hose towards the left side of the bike and blocking it. It goes 90 degrees from horizontal to vertical and I cannot see its ultimate connection, without removing my fuel tank.
Will email a photo to Max and Peter, if they want to post.
1. The ECM has an internal 5 vdc poower supply for sensors. The black/yellow output is going to be less with engine off for two reasons:
a. With key on, but engine not running, there is electrical drain, especially from the headlight, sagging the voltage.
b. With engine running, the 3 phase alternator is recharging the battery at 13.8 to 14.8 volts.
2. I am remain concerned about a vacuum leak, such as the two vacuum hose fittings or a poor electrical connection. However, a poor connection should result in a DTC:
12-1 for fuel injector 1
13-1 for fuel injector 2
14-1 for fuel injector 3
15-1 for fuel injector 4
29-1 for IACV, etc.
3. The earlier suggestion about the evap canister purge is worth considering. Max may have a different approach, but I would be inclined to unplug the "evap purge control solenoid valve". Wires are bl/w to junction and bl/y to ECM A29. That position is labeled PCS on the factory schematics. No clue as to when the ECM triggers a purge (definitely engine running and full operating temperature, maybe minimum RPM?), but be interesting to take that out of the picture. This thread has a clue as to its location (easily seen in front of airbox from right side-easy to unplug electrical connection) and another clue for this saga: http://cb1100forum.com/forum/showthread.php?tid=2819. Dave, what was the result of post 5 (2 May 2014)?
The bl/w wire is switched power from a 12 wire, 14 position junction, so the purge solenoid has power to it with the key on. The bl/y goes from the purge solenoid to the ECM, which must close the circuit, for the solenoid to operate. If the bl/y is grounded (rubbing on metal?) it would operate the purge without the ECM. Unprogrammed operation or stuck open would create a vacuum leak/lean operation. When unplugged, power to it should result in an audible click...no click if stuck open.
The canister itself is so buried, I thought I did not have one, but with the center stand down, looking up forward and higher than the voltage regulator, popgun educated me on its location.
To take the evap system completely out of operation, for testing, you may want to simply block off the vacuum line from the purge valve to the throttle body assembly, by removing the hose towards the left side of the bike and blocking it. It goes 90 degrees from horizontal to vertical and I cannot see its ultimate connection, without removing my fuel tank.
Will email a photo to Max and Peter, if they want to post.