TOHATSU 40 Service Manual page 310

If no voltage or low voltage is obtained, the trim meter or trim meter
output wiring is defective. Repair or replace as needed before
proceeding.
6. Reconnect all wiring and repeat voltage output test for 9 VDC. If
no voltage or low voltage is obtained, perform the following:
Analog trim meter- Check all wiring between trim sender (9)
1
and terminals (5), (6), (7), and (8) for shorts-to-ground.
LCD trim meter - Check all wiring between trim sender (12)
2
and connector (8) for shorts-to-ground.
If wiring is shorted, repair or replace as needed.
7. Reconnect all wiring before proceeding.
Trim Sender Output Voltage
8. Operate PT/T motor and lower engine to fully DOWN position.
9. Using a digital multimeter, connect the RED tester lead to:
Analog trim meter - terminal (7).
1
LCD trim meter - terminal (13).
2
Connect the BLACK tester lead to:
Analog trim meter - terminal (5).
1
LCD trim meter - terminal (14).
2
10. Operate the PT/T motor from DOWN to UP and verify the
following:
• DOWN voltage is between - 5 and - 15 mV.
• UP voltage is between -115 and -125 mV.
If test results vary, trim sender unit is defective and must be
replaced.
POWER TRIM/TILT
Always wear safety glasses and skin protection
when servicing power trim/tilt unit.
Never fully open the manual valve when engine is
tilted down – oil pressure is at its highest.
The following procedures apply to all PT/T models.
New style PT/T shown in photographs.
3-/ 4-Cylinder
WARNING
WARNING
NOTE
POWER TRIM/TILT
8-11