Join Date: Jun 2018
Location: Sumter, SC
Model: Goldwing GL1500 Aspencade
Performed CAJ2 and CAJ3 test according to pages 4-50 and 4-51 of the maintenance manual. Refer to the two attachments for your reference.
I performed an individual vacuum test of AJ2 and AJ3 solenoids, and both hold vacuum as required. HOWEVER, when performing the tests according to pages 4-50 and 4-51, AJ2 solenoid is OPEN while at 800 RPM (IDLE) when it should be closed. When I apply at least 7.9 InHg to the ECU, AJ2 then closes and no vacuum is lost. However, while at idle, and since I am below 1,000 feet above sea level (about 383 feet ASL), according to the chart, AJ2 and AJ3 should be closed with 0 InHg applies to the ECM. Mind you this is with the bike at idle 800 RPM, both valves should be closed since I am below 1,000 feet ASL, although the manual states this depends on the altitude pressures.
I place my hand on AJ2 and shut off the bike, I do not feel a change. I place my hand on AJ2 and start the bike, I feel a slight click but not too heavy as it does when I apply 7.9 InHG to the ECU. Run the RPM to 2,000 RPM and both AJ2 and AJ3 click (as in open), when according to the manual, AJ3 shouldn't open at all. So both AJ2 and AJ3 are opening nearly at the same time between 7.9 InHg and 15 InHg applied to the ECU or when RPM is increased to 2,000 RPM.
The test is somewhat confusing. But in a nutshell, my problem appears to be AJ2 is opening at all times while at idle (800 RPM's) even though the valve itself is not actually clicking open. Yet apply a little pressure to the ECU (7.9 InHg), and then AJ2 snaps/clicks closed when even at idle it is supposed to be closed. But when it closes, vacuum pressure is still lost. Shut down the bike, and all of a sudden AJ2 is fully closed and vacuum pressure is maintained.
To make it easier to understand, AJ2 should ONLY OPEN with 7.9 InHg applied to ECU and RPM reaches 2,000, this according to both charts. AJ3 should always be closed since I believe 1,000 feet ASL (I believe this is correct; correct me if I'm wrong). Thus, AJ2 should only open when RPM reaches 2,000 on both charts, respective of their vacuum applications to the ECU.
Unless I'm in error, it sounds as though AJ2 is receiving a faulty signal for some reason to slightly open although not all of the way until RPM reach 2,000, or the ECU vacuum reaches at least 7.9 InHg.
Could this be my problem? Or could this be related to a possible vacuum leak somewhere and the ECU is not getting enough vacuum for proper operation.