Yamaha WaveRunner VX 700 Service Manual page 173

Symptom 1: Engine will not start (engine cranks).
Symptom 2
Throttle valve does
not move properly
Discharged battery
Spark plug does not
spark (all cylinders)
WD: See the wiring diagram.
Cause
Throttle cable installed
incorrectly
Throttle valve malfunction
Battery performance
decrease
Lighting coil malfunction
Rectifier regulator mal-
function
Short, open, or loose con-
nection in charging circuit
Engine shut-off cord clip
not installed
Engine stop switch mal-
function
Pickup coil malfunction
Short, open, or loose con-
nection in pickup coil cir-
cuit
CDI unit malfunction
Charge coil malfunction
Short, open, or loose con-
nection in ignition coil cir-
cuit
Engine unit troubleshooting
Checking step
Adjust the throttle lever free play.
Check the carburetor.
Check the battery voltage and spe-
cific gravity.
Measure the lighting coil output
peak voltage.
Measure the lighting coil resis-
tance.
Check the lighting coil wiring har-
ness leads for continuity.
Measure the rectifier regulator out-
put peak voltage.
Check the rectifier regulator wiring
harness leads for continuity.
Check the battery cable and termi-
nal for proper connection.
Check the wiring harness.
Check that the engine shut-off cord
clip is installed properly.
Check the engine stop switch. (left
handlebar switch)
Measure the pickup coil output
peak voltage.
Measure the pickup coil resistance.
Check the pickup coil wiring har-
ness leads for continuity.
Measure the CDI unit output peak
voltage.
Measure the CDI unit resistance.
Check the CDI unit wiring harness
leads for continuity.
Measure the charge coil output
peak voltage.
Measure the charge coil resistance.
Check the charge coil wiring har-
ness leads for continuity.
Measure the ignition coil resis-
tance.
Check the ignition coil wiring har-
ness leads for continuity.
See
page
1
3-2
4-14
3-8
2
7-9
7-9
WD
3
7-9
WD
4
7-2
WD
7-10
5
7-10
7-8
6
7-8
WD
7-6
7
7-6
WD
7-7
8
7-7
WD
9
7-6
WD
A
9-2