1 MONITOR CONTROLLER AND DISPLAY CIRCUIT DIAGNOSTIC PROCEDURES
IMPORTANT: Do not disconnect electrical connectors while the engine is running. Damage to Engine and
Pump Controller or other components may result. Disconnect connectors only when instructed during a
test or check.
NOTE: Before troubleshooting the circuits, clean all pins in the monitor controller and harness connectors using a
non-conductive lubricating contact cleaner, then try the circuit operation again before proceeding. TY16324 Contact
Cleaner can be used.
Remove fuse block cover.
YES: Fuse is OK.
AND DISPLAY 5 AMP
FUSE (F6) CHECK
Remove fuse from fuse block.
NO: Replace Fuse. If
fuse blows again, check
YES: Go to next check.
AND DISPLAY (A5)
NO: Repair harness.
Turn key switch OFF.
Disconnect 20-pin harness connector from monitor controller and display.
Measure voltage on pins 30, 39 and 40 of harness connector.
Is 24 volts measured?