Kohler Aegis ELH775 Service Manual page 49

Code 0174
Component: Fuel System
Fault: Lean fuel condition
Condition: Fuel inlet screen/fi lter plugged, low
pressure at high pressure fuel line, TPS
malfunction, shorted connection or faulty
sensor.
Conclusion: TPS Learn Incorrect
● Lean condition (check oxygen sensor
signal with VOM and see Oxygen
Sensor).
Engine Wiring Harness Related
● Pin circuit wiring or connectors.
ECU pin Black 10, 12, 16 and 17.
Low Fuel Pressure
● Plugged fi lters.
● Fuel pressure regulator malfunction.
● Fuel pump malfunction.
Oxygen Sensor Related
● Sensor connector or wiring problem.
● Exhaust leak.
● Poor ground.
Poor system ground from ECU to engine,
causing rich running while indicating lean.
Fuel pump connection. See Fuel
Components.
Code 0201
Component: Fuel Injector
Fault: Injector 1 Circuit Malfunction
Condition: Injector damaged or faulty, shorted or
open connection.
Conclusion: Injector Related
● Injector coil shorted or opened.
Engine Wiring Harness Related
● Broken or shorted wire in harness.
ECU pin Black 5.
● Wiring from Ignition.
ECU Related
● Circuit controlling injector #1 damaged.
66 690 14 Rev. A
Code 0202
Component: Fuel Injector
Fault:
Condition:
Conclusion: Injector Related
Code 0230
Component: Fuel Pump
Fault:
Condition:
Conclusion: Fuel Pump Related
Code 0232
Component: Fuel Pump
Fault:
Condition:
Conclusion: Fuel Pump Related
KohlerEngines.com
Injector 2 Circuit Malfunction
Injector damaged or faulty, shorted or
open connection.
● Injector coil shorted or opened.
Engine Wiring Harness Related
● Broken or shorted wire in harness.
ECU pin Black 6.
● Wiring from Ignition.
ECU Related
● Circuit controlling injector #2 damaged.
Circuit Low Voltage or Open
Shorted or open connection.
● Fuel pump 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.
Circuit High Voltage
Shorted connection.
● Fuel pump damaged internally.
Charging Output System Too High.
EFI System
49