Trouble Shooting DBW
Problem – System surges in all modes, including control test.
Check – Poor ground connection for PerfectPass main ground wire.
- Perform Open circuit voltage tests on vgov, stat & rqst which may lead
you to a incorrect ECM wire location or harness issue.
Problem – Customer indicates system does not engage.
Check – Perform a CONTROL TEST. If it engages & holds properly during
control test, check the adjustable parameters (KDW, NN and Control Settings
CS/CR) If it does not engage, perform Open Circuit Tests.
Make sure there is an rpm reading on screen or PerfectPass will never operate
properly.
Problem – No speed reading on PerfectPass Display
Check – If your boat speedometer is O.K., check paddle wheel signal on green
wire coming into the Master Module on Amp Seal Connector. If paddle is spun
slowly, you should see 0 volts / 12 volts as wheel slowly turns. As wheel is spun
quickly, you will see an average of 5 volts.
(If voltage is good, perform a “System Reset”).
If MasterCraft speedometer is not reading, it must be corrected and PerfectPass
will likely then read properly.
Problem – No rpm reading on PerfectPass display
Check – The RPM signal wire at the Amp Seal connector coming into Master
Module. With engine off you should see about 9 volts. (With engine running, you
should see a normal tach pulse signal) If no signal, check the pin at ECM. The
system will never control properly in any mode without an RPM signal.
Problem – PerfectPass in Wakeboard mode is set at 22 mph and digital
speedometer shows 22, but actual speed is 24.
Check – Use Menu Key to highlight Menu Arrow Icon and press Down Key to
reach “SPEEDOMETER ADJUST”, quickly press down key several times and
lower speed by 2 mph. All Wakeboard speeds now calibrated.
Problem – Key is on, but PerfectPass screen does not become active and
show data.
Check – PerfectPass requires 12+ volts for start up. Check voltage on red wire
(12 v) power source to Master Module. If backlight is ON, check screen contrast.
Check screen contrast – Press Menu & UP Keys together, then press UP Key a
couple of times. Does data re-appear?
PerfectPass Control Systems (902) 468-2150 Page 5
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