Kohler ECV940 / ECV980 — ECU Reset Procedure (non-ETB)
Testing & diagnosis · Electronic Control Unit (ECU)
For the Kohler ECV940 / ECV980, from the Kohler service manual.
Applies to: Kohler ECV940, Kohler ECV980
Before you start
- This system will NOT reset when battery is disconnected.
Procedure
- Turn key/ignition OFF.
- Install Red wire jumper from Kohler EFI service kit to service port (connect white to black wire in 4 way diagnostic port).
- Turn key ON then OFF, count 10 seconds.
- Turn key ON then OFF, count to 10 seconds a second time.
- Remove Red wire jumper. Turn key ON then OFF, count 10 seconds a third time. ECU is reset.
- A TPS Learn Procedure must be performed after ECU reset.
Tools required
- Red wire jumper (Kohler EFI service kit) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.