TOHATSU MD 70-90C2 Service Manual page 306

O
Troubleshooting
K
PTT Unit
State 1 PTT unit will not operate.
Check operation of PTT
motor.
Operating
noise heard?
YES
Check that manual valve is
closed.
Closed?
9-30
NO
Check battery and fuse.
Check electrical conductivity
of PTT switch.
Check electrical conductivity
of PTT solenoid.
Check wire harness between
battery, PTT solenoid and
PTT switch.
Disassemble PTT motor
to check.
YES
Go to next page.
NO
Normal?
YES
NO
Conductive?
YES
NO
Conductive?
YES
NO
Conductive?
YES
NO
Repair or replace
defective parts.
Replace PTT switch.
Replace PTT solenoid.
Repair or replace
defective parts.
Close manual valve.
TLDI 75/90C2 2010