Trim Position Sensor Location
a - Trim position sensor magnet
b - Screws (2)
c - Trim position sensor
d - Tilt lock bracket
Port side of outboard
a - Port lower cowl
b - Trim position sensor connector
Testing the Trim Position Sensor with DMT 2004A
The trim sensor requires a 5 volt reference signal from the PCM.
Check for reference signal voltage with the ignition switch in the run position and using an appropriate probe (paper clip, etc.)
inserted in parallel at the trim sensor connector.
DMT 2004 Digital Multimeter
91‑892647A01
Meter Test Leads
Meter Scale Reading
Red Black
Purple/black Black/green VDC 5.0 ± 0.1
IMPORTANT: The 5 volt reference at the PCM can be monitored by the CDS G3. Voltage should be 5 VDC ± 0.1 VDC. Any
other voltage indicates a defective PCM. If the PCM reference voltage is correct, but voltage at the trim sensor is low or
nonexistent, inspect the sensor wiring and connections.
Check the resistance of the trim position sensor circuit harness and PCM.
DMT 2004 Digital Multimeter
91‑892647A01
Meter Test Leads Meter Scale Reading
Red Black
Yellow Black/green Ohms 210 kΩ ± 20%
Advanced Midsection (AMS) Power Trim
Page 6D-12 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018
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