Kohler ECV940 Service Manual page 52

EFI SYSTEM-ELECTRONIC THROTTLE BODY (ETB)
Fault Code MIL Blinks
Code P0230 10/5/4/3
Component: Fuel Pump
Fault: Circuit Low Voltage or Open
Condition: Shorted or open connection.
Conclusion: Fuel Pump Related
● Fuel pump module open or shorted
internally.
Engine Wiring Harness related
● Broken or shorted wire in harness.
ECU pin Black 9 or Grey 17.
ECU Related
● ECU is damaged.
Fault Code MIL Blinks
Code P0232 10/5/4/3
Component: Fuel Pump
Fault: Circuit High Voltage
Condition: Shorted connection.
Conclusion: Fuel Pump Related
● Fuel pump module damaged internally.
Charging Output System Too High.
Fault Code MIL Blinks
Code P0336 10/2/7/12
Component: Crankshaft Position Sensor
Fault: Crankshaft Position Sensor Noisy Signal
Condition: Loose sensor, faulty/bad battery, shorted
or faulty connection, faulty sensor or
faulty sensor grounding.
Conclusion: Crankshaft Position Sensor Related
● Sensor connector or wiring.
● Sensor loose.
Crankshaft Position Sensor Wheel
Related
● Damaged teeth.
● Gap section not registering.
Engine Wiring Harness Related
● Pin circuit wiring or connectors.
ECU pin Black 4 and Black 13 may be
routed near noisy signal (coils, stator,
etc.).
● ECU-to-harness connection problem.
Ignition System Related
● Non-resistor spark plug(s) used.
● Faulty or disconnected ignition coil or
secondary lead.
52
SPN FMI
1347 5
SPN FMI
1347 6
SPN FMI
636 2
KohlerEngines.com
Fault Code MIL Blinks
Code P0337 10/2/7/12
NOTE: If fault code P0337 is present and engine does
not start/run, proceed to step 1 of Crankshaft
Position Sensor earlier in this section. If P0337
is present and engine operates, clear codes and
retest.
Component: Crankshaft Position Sensor
Fault: Crankshaft Position Sensor No Signal
Condition: Loose sensor, open or shorted
connection (sensor connector or battery
connections) or faulty sensor.
Conclusion: Crankshaft Position Sensor Related
● A false fault code P0337 is triggered by
a voltage drop with key ON and engine
off . Voltage drop may be caused by a
poor/inadequate battery connection,
battery charger connected or
disconnected, or any event that may
interrupt voltage signal to ECU like a
power interruption or heavy load from
equipment that results in a recordable
voltage drop.
● Sensor connector or wiring.
● Sensor loose.
Crankshaft Position Sensor Wheel
Related
● Damaged teeth.
Engine Wiring Harness Related
● Pin circuit wiring or connectors.
ECU pin Black 4 or Black 13.
● ECU-to-harness connection problem.
If code is stored in fault history and starts
normally. Clear code, no other service
required.
SPN FMI
636 8
62 690 05 Rev. H