Yamaha WaveRunner VXR VX1800A, Service Manual

Page: 307 / 318

Engine unit troubleshooting
9-16
Discharged battery
Battery performance de-
crease Check the battery voltage and spe-
cific gravity.
3-6
Stator coil malfunction Check the stator coil 7-13
Short, open, or loose con-
nection in charging circuit
Check the battery lead and terminal
for proper connection.
3-6
Check the wire harness. A-2
ECM does not oper-
ate
Blown fuse Check the fuse for continuity.
7-3
7-31
Main relay malfunction Check the main relay. 7-31
Short, open, or loose con-
nection in ECM circuit
Measure the ECM input voltage. 7-27
Check the ECM circuit for continuity. 7-27
ECM malfunction Replace the ECM. —
Spark plug does not
spark (all cylinders)
Engine shut-off cord clip
not installed Check that the engine shut-off cord
clip is installed properly.
7-31
Engine stop switch mal-
function Check the engine stop switch conti-
nuity. [handlebar switch (left)]
7-31
Pickup coil malfunction
Measure the pickup coil output peak
voltage.
7-12
Measure the pickup coil resistance. 7-12
Short, open, or loose con-
nection in pickup coil circuit
Check the white/black (W/B) and
black/orange (B/O) pickup coil leads
for continuity.
A-2
Short, open, or loose con-
nection in ignition coil cir-
cuit
Measure the ignition coil input volt-
age (from the battery).
7-11
Check the red/yellow (R/Y),
black/red (B/R), black/white (B/W),
black/yellow (B/Y), and black/green
(B/G) ignition coil leads for continui-
ty.
A-2
Ignition coil malfunction
Exchange the ignition coil with a dif-
ferent one, and then check the igni-
tion spark.
—
ECM malfunction
Measure the ECM output peak volt-
age.
7-11
Symptom 2 Cause Checking step
See
page