Yamaha WaveRunner FZR-GX1800 Service Manual page 392

TRBL
SHTG
Symptom 1: Engine will not start (engine cranks).
Symptom 2
Throttle valve does
not move properly.
Discharged battery
ECM does not
operate
Spark plug does not
spark (all cylinders)
WD: Refer to the wiring diagram.
Engine unit troubleshooting
Cause
Throttle lever squeezed
Throttle cable installed
incorrectly
APS mulfunction
TPS mulfunction
Throttle valve malfunction
Battery performance dec-
rement
Stator coil assembly mal-
function
Short, open, or loose con-
nection in charging circuit
Blown fuse
Main and fuel pump relay
malfunction
Short, open, or loose con-
nection in ECM circuit
ECM malfunction
Engine shut-off cord (lan-
yard) clip not installed
Engine stop switch mal-
function
Pickup coil malfunction
Short, open, or loose con-
nection in pickup coil cir-
cuit
Short, open, or loose con-
nection in ignition coil cir-
cuit
ECM malfunction
Checking step
Check that the throttle lever is in
the fully closed position.
Adjust the throttle lever free play.
Measure the APS 1 and 2
resistance.
Check the throttle valve opening.
Check the throttle body assembly.
Check the battery voltage and
specific gravity.
Check the stator coil assembly.
Check the battery cable and
terminal for proper connection.
Check the wiring harness.
Check the fuse for continuity.
Check the main and fuel pump
relay.
Measure the ECM input voltage.
Check the ECM circuit for
continuity.
Replace the ECM.
Check that the engine shut-off cord
(lanyard) clip is installed properly.
Check the engine stop switch
continuity. (left handlebar switch)
Measure the pickup coil output
peak voltage.
Measure the pickup coil resistance.
Check the white/black (W/B) and
black/orange (B/O) pickup coil
wiring harness leads for continuity.
Measure the ignition coil input
voltage (from the battery).
Check the red/yellow (R/Y), black
(B), black/red (B/R), black/white (B/
W), black/yellow (B/Y), and black/
green (B/G) ignition coil wiring
harness leads for continuity.
Measure the ECM output peak
voltage.
9-17
E
Refer
to page
1
—
3-5
7-29
2
7-26
5-37
3-19
3
7-14
8-43
WD
4
7-44
7-45
7-38
7-38
5
—
7-44
7-44
6
7-13
7-13
WD
7
7-10
WD
8
7-10