56
UnclassifiedLubrication
What This Code Means
Fuel pump, ignition coils, and fuel injectors will not function; Engine will not run; Fuel pump will continue to run when switch is off
Possible Causes
- •Bad fuel pump relay
- •Bad fuel pump relay (Primary side open or shorted)
- •Bad fuel pump relay (primary side functional but pin 30 to pin 87 remains open, or primary side pin 85 to pin 86 open/shorted during engine operation)
- •Bad fuel pump relay (primary side functional, but pin 30 to pin 87 remains open)
- •Broken or shorted wire in harness (ECU pin 14 to injector pin 2, ECU pin 28 to fuel pump relay pin 86, Fuel pump relay pin 87 to injector pin 1)
- •Broken or shorted wire in harness (ECU pin 15 to injector pin 2, ECU pin 28 to fuel pump relay pin 86, Fuel pump relay pin 87 to injector pin 1)
- •Broken or shorted wire in harness between ECU pin 28 to fuel pump relay pin 86
- •Broken or shorted wire in harness between Ignition switch to fuel pump relay pin 85
- •Circuit controlling fuel pump relay damaged
- •Circuit controlling injector #1 damaged
- •Circuit controlling injector #2 damaged
- •ECU circuit controlling fuel pump relay damaged
- •Fuel pump fuse F1 open
- •Fuel pump open or shorted internally
- •Fuel pump relay circuit open, shorted to ground, or shorted to battery
- •Fuel pump relay primary side pin 85 to pin 86 open or shorted during engine operation
- •Injector coil shorted or opened
- •Open main fuse F1
- •Opened main fuse F1
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Get a diagnosis walkthrough for 56 on your specific KOHLER CO. unit — cited to the OEM manual, not a forum guess.
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