Kohler Command Pro EFI ECH940 Service Manual page 50

EFI SYSTEM
Code 0336
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.
● ECU-to-harness connection problem.
Ignition System Related
● Non-resistor spark plug(s) used.
● Faulty or disconnected ignition coil or
secondary lead.
Code 0337
Component: Crankshaft Position Sensor
Fault: Crankshaft Position Sensor No Signal
Condition: Loose sensor, open or shorted
connection or faulty sensor.
Conclusion: Crankshaft Position Sensor Related
● 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.
Code 0351
Component: Ignition Coil
Fault: Cylinder 1 Ignition Coil Malfunction
Condition: Broken wire in harness (may not be
visible), shorted connection or faulty
sensor.
Conclusion: Engine Wiring Harness Related
● Connection to ignition or fuse.
● Pin circuit wiring or connectors.
● ECU pin Black 1.
● ECU-to-harness connection problem.
Ignition System Related
● Incorrect spark plug(s) used.
● Poor connection to spark plug.
50
Code 0352
Component: Ignition Coil
Fault:
Condition:
Conclusion: Engine Wiring Harness Related
Code 0562
Component: System Voltage
Fault:
Condition:
Conclusion: Corroded Connections
Code 0563
Component: System Voltage
Fault:
Condition:
Conclusion: Faulty Rectifi er-Regulator
Code 0650
Component: MIL Circuit
Fault:
Condition:
Conclusion: Bad ECU.
Code 1693
Component: Tach Output (ECU)
Fault:
Condition:
Conclusion: Bad Tach Wire (grounded).
KohlerEngines.com
Cylinder 2 Ignition Coil Malfunction
Broken wire in harness (may not be
visible), shorted connection or faulty
sensor.
● Connection to ignition or fuse.
● Pin circuit wiring or connectors.
ECU pin Grey 10.
● ECU-to-harness connection problem.
Ignition System Related
● Incorrect spark plug(s) used.
● Poor connection to spark plug.
System Voltage Low
Faulty voltage regulator, bad fuse or
shorted connection.
Bad Stator
Bad Battery
● Low output charging system.
● Poor magnet in fl ywheel.
● Bad or missing fuse.
System Voltage High
Faulty voltage regulator or shorted
connection.
Bad Stator.
Bad Battery.
MIL Circuit Malfunction
Failure in MIL circuit detected.
Bad Connection.
Broken Wire.
Tach Circuit Low
Tachometer output circuit short to ground.
GCU circuit short to ground.
62 690 13 Rev. A