4-35
TRBL
SHTG
Troubleshooting
Troubleshooting the PTT unit
Troubleshooting consists of the following 3 items:
Symptom 1: Specific trouble conditions
Symptom 2: Trouble conditions of an area or individual part
Cause: Trouble causes of symptom 2
— : Not applicable
Symptom 1: PTT unit does not operate.
Symptom 1: PTT unit does not hold the outboard motor up.
Symptom 2
Cause
Checking step
See
page
PTT relay does not oper-
ate
Blown fuse
Check the fuse.
PTT switch malfunction
Check the PTT switch.
PTT relay malfunction
Check the PTT relay.
Short, open, or loose connec-
tion of the wiring harness
Measure the PTT switch input voltage.
Measure the PTT relay input voltage.
Check for continuity between the PTT
switch and the fuse holder.
Check for wiring continuity between the
PTT switch and engine ECM.
Check for wiring continuity between the
PTT relay and engine ECM.
PTT motor does not
operate
PTT motor malfunction
Check the PTT motor.
Short, open, or loose connec-
tion of the PTT motor lead
Check for wiring continuity between the
PTT motor and the PTT relay terminal.
PTT fluid pressure does
not increase
—
Measure the PTT fluid pressure
Manual valve opened
Check the manual valve.
Insufficient PTT fluid
Add sufficient PTT fluid.
PTT fluid leakage
Check the PTT fluid leakage.
Clogged fluid passage
Disassemble and check the PTT unit.
Check the filter for dirt and obstructions.
Check the valves for damage.
Check the fluid passages for obstruc-
tions.
Gear pump malfunction
Check the gear pump assembly.
Symptom 2
Cause 1
Checking step
See
page
Decrease in PTT fluid
pressure in lower cham-
ber of PTT cylinders
Manual valve open
Check the manual valve.
Insufficient PTT fluid
Add sufficient PTT fluid.
PTT fluid leakage
Check the PTT fluid leakage.
Clogged or open fluid passage Disassemble and check the PTT unit.
Check the valves for damage.
Check the fluid passages for obstruc-
tions.
Summary of Contents for F225F
Page 1: ...SERVICE MANUAL 6CE 28197 3N 11 F L 225F F L 250D F L 300B ...
Page 4: ......
Page 54: ...1 31 SPEC Specification MEMO ...
Page 89: ...2 34 Lower unit 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 263: ...6 28 Canister 0 1 2 3 4 5 6 7 8 9 10 A j k f b ...
Page 477: ...8 98 Shimming counter rotation model 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 537: ...9 58 PTT cylinder 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 562: ...A 1 MEMO ...
Page 565: ......
Page 566: ...May 2010 1 ABE E_1 YAMAHA MOTOR CO LTD ...
Page 576: ...A 13 ...