Crank Position Sensor Testing - Mercury 25 EFI Service Manual

Ignition

Crank Position Sensor Testing

18 1
15
32
33
34 17
a - ECM engine harness connector
b - Port CPS
c - Starboard CPS
NOTE: Reading listed are taken at 20 °C (68 °F) with a digital ohmmeter. Due to the number of different manufactures of
meters available and temperature variance, your test results may vary.
NOTE: It is not necessary to remove the crank position sensors from the powerhead for testing.
Port CPS (Single Wire)
1. Disconnect the CPS connector from the engine wire harness connector.
a
2. Connect one of the meter leads to the CPS connector and the other meter lead to engine ground.
DMT 2004 Digital Multimeter
3. Replace the CPS if out of specification.
Page 2A-18
b
a
BLK
RED/WHT
RED/YEL
b
© 2016 Mercury Marine
a - Starter
b - CPS connector
c - Vapor Separator Tank (VST)
c
9958
91‑892647A01
c
BLK
RED/WHT
22578
90-8M0105568 eng MARCH 2016