Troubleshooting Guide
System Diagnosis
6
6-10
HD-R10doc072619
Troubleshooting Guide
Check DTC Code history for
Engine ECU fault codes
If there are any Main Relay or Actua-
tor Relay errors inspect the relays
Replace as necessary.
Contact Crosspoint(Yanmar)
Blown fuse
Check Engine Harness Power
fuse(F7)
Check Engine Harness Ignition
fuse(F12)
Engine Harness fuses:
Main Relay fuse(F1)
Replace fuses if necessary
Faulty Main Relay
Inspect for debris, relay connectors
should have dielectric grease in them
to prevent debris from entering and
corrosion. Clean out debris if neces-
sary, grease if necessary.
Replace if necessary
Faulty Actuator Relay
Inspect for debris, relay connectors
should have dielectric grease in them
to prevent debris from entering and
corrosion. Clean out debris if neces-
sary, grease if necessary.
Replace if necessary
Engine Harness J5 Connec-
tor(Large Round 21-pin Con-
nector)
Inspect for proper connection and
debris.
Low Battery
Bad connection on oil pressure
switch
This can cause the EGR valve to run
after the engine has been turned off
Key switch was left on for an
extended period with the engine not
running
Defective battery, replace
Accelerator Pedal Position
Sensor “A” errors
Throttle ECU Issue
See Throttle ECU Communication
Loss
Blade Speed setting
Blade speed can be set between
2840-5800 ft/min. If the setting gets
below 2840 it can cause the Engine
ECU to display this fault
PROBLEM
CAUSE
SOLUTION
