Kohler Command PRO EFI ECH749 [87/180] Efi system ech

Kohler Command PRO EFI ECH749 [87/180] Efi system ech
8724 690 01 Rev. O KohlerEngines.com
EFI SYSTEM-ECH
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 VOA 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.
Bad lift pump.
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 module 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.
Code 0202
Component: Fuel Injector
Fault: Injector 2 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 6.
Wiring from Ignition.
ECU Related
Circuit controlling injector #2 damaged.
Code 0230
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.
Code 0232
Component: Fuel Pump
Fault: Circuit High Voltage
Condition: Shorted connection.
Conclusion: Fuel Pump Related
Fuel pump module damaged internally.
Charging Output System Too High.

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