Troubleshooting Procedure (Trouble Code Not Detected); Troubleshooting The Power Unit - Yamaha F30B 2018 Service Manual

Troubleshooting procedure (trouble code not detected)

Troubleshooting consists of the following 5 items:
Symptom 1: Specific trouble conditions
Symptom 2: Trouble conditions of an area or individual part
Cause: Trouble causes of symptom 2
Checking steps: Method for checking
See page: Reference page
—: Not applicable

Troubleshooting the power unit

Symptom 1: Engine does not crank.
Symptom 2
Starter motor does
not operate
Starter motor oper-
ates, but the engine
does not crank
Symptom 1: Engine will not start (engine cranks).
Symptom 2
Engine ECM does not
operate
Cause
Gear shift not in the N posi-
tion
Blown fuse
Starter relay malfunction
Engine start switch mal-
function
Neutral switch malfunction
Short, open, or loose con-
nection in starter motor cir-
cuit
Starter motor malfunction
Stuck piston or crankshaft
Stuck drive shaft
Cause
Blown fuse
Main relay malfunction
Short, open, or loose con-
nection in the engine ECM
circuit
Outboard motor troubleshooting
Checking steps
Set the gear shift to the N position.
Check the fuse.
Check the starter relay.
Check the engine start switch.
Check the neutral switch.
Check the starter relay input voltage.
Check the wire harness for continui-
ty.
Disassemble and check the starter
motor.
Disassemble and check the power
unit.
Check the drive shaft bushing.
Disassemble and check the lower
unit.
Checking steps
Check the fuse.
Check the main relay.
Check for wire harness continuity
between the main relay and the en-
gine ECM.
Check for continuity between the en-
gine ECM and ground.
4-7
See
page
10-4
5-1
5-34
5-35
—
5-34
A-16
5-36
7-49
9-16
8-11
See
page
5-3
5-17
A-15
5-18