Troubleshooting - Kohler ECV940 Service Manual

Table of Contents

b. Test light conﬁ rmation: Turn key oﬀ . Disconnect DVOM. Connect 12 volt test light across terminals in plug. Key

needs to remain oﬀ for a minimum of 30 seconds before proceeding. Turn key on. Conﬁ rm test light illuminates

for approximately 6 seconds. After approximately 6 seconds, test light will remain oﬀ unless another prime

cycle is initiated.

5. If battery voltage is not present and/or test light does not illuminate, connect red lead of DVOM to red wire of plug

and black lead to a battery ground while key is still ON.

6. If battery voltage is present, turn key switch OFF and connect an ohmmeter between terminals on FPM to check

for continuity. If battery voltage at plug was conﬁ rmed, and there was continuity across FPM terminals, reconnect

plug to FPM, making sure you have a good connection. Turn on key switch and listen for FPM to activate.

a. If FPM starts, repeat steps 2 and 3 to verify correct pressure.

b. If FPM still does not operate, replace it.

7. If battery voltage was not present at connector inspect fuse and wiring harness.

High Pressure Fuel Line

High pressure fuel line is mounted to intake manifold. No speciﬁ c servicing is required unless operating conditions

indicate that it needs replacement. Thoroughly clean area around all joints and relieve any pressure before starting

any disassembly. Detach by removing two mounting screws, wire ties, and injector retaining clips.

Purge Port and Vent Hose Assembly

No speciﬁ c servicing is required for vent hose assembly or purge port unless operating conditions indicate

replacement is required. All components are serviced individually. Abrasion sleeves on hoses should be reused

or replaced when servicing vent hoses. Please note vent hose routing and replicate after service or component

replacement to prevent pinching or abrasion of vent hoses. Only Kohler replacement parts can be used because

ﬁ tting is speciﬁ c to system and must be maintained. Visit KohlerEngines.com for recommended Kohler replacement

parts.

Electronic Throttle Body (ETB)/Intake Manifold Assembly

NOTE: ECU Reset is required if electronic throttle body is replaced.

Electronic throttle body (ETB) is serviced as an assembly, with throttle shaft, TPS, and throttle plate installed. Throttle

shaft rotates on needle bearings (non-serviceable), capped with seals to prevent air leaks.

ETB can be tested using KOHLER

Test and follow instructions in help (?) area of test.