If you lower the 1.0 volt setting by pressing Down Key to .7 volts, the engine rpm
will drop to about 1420 and hold reasonably steady.
(If you perform this test on the water on the fly, it should hold very steady at
about 1730).
If the RPM does not hold at 1730 the “RQST” line may not be connected. Either
the Request Line or the VGOV Line has lost continuity.
If the engine holds RPM at approximately 1730, but the S does not appear on
screen, then check continuity of the Status Line. Voltage Testing in Control Test
Mode. If the test fails, perform voltage checks.
Voltage Test (Control Test Mode)
These measurements are taken in Control Test Mode with system ON and R
must be on screen. This test will confirm whether PerfectPass and the ECM are
properly connected.
Locate the 14-pin engine connector on the PerfectPass Module or ideally the 9-
pin MAT N LOK connector on PerfectPass harness. You will need to apply test
tee connectors or insert small test pins beside the wires as they exit the
connector to be able to measure the voltage present on each wire. These are
taken while in Control Test, with “R” on screen.
- Measure the voltage on the RQST (request line) which should measure
less than 1 volt. (0 to 1 volt) Engine running or not running.
- Measure voltage on VGOV (vgov line) which should measure about 1 volt.
(.8 to 1.2 volts) Engine running or not running.
- Measure voltage on STAT (stat line) which will be 10 + volts when S is not
on display. (When engaged and working properly this pin at ECM is
grounded and voltage will be less than 1 volt.) Engine must be running for any
measurement on STAT line.
- Press the OFF key and the “R” will disappear. Now measure voltage on
RQST wire again which should now measure more than 4.5 volts, this
confirms proper operation of PerfectPass Request driver and ECM
connection.
Other Measurements:
With control OFF and R not on Screen:
RQST Line – 4.5 V
VGOV Line – 4 V +
STAT Line – 10 V +
PerfectPass Control Systems (902) 468-2150 Page 4
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