Cummins/Onan GST30 G-Drive / QST30 G-Drive — Simulate an overspeed condition that causes a fault
Testing & diagnosis · Fault Simulation - Overspeed tab
For the Cummins/Onan GST30 G-Drive / QST30 G-Drive, from the Cummins/Onan service manual.
Applies to: Cummins/Onan QST30 G-Drive engine
Before you start
- Fault simulation temporarily overrides the engine's actual fault sensors; exit normally or sensors remain disabled.
Procedure
- Adjust the Shutdown Threshold spin box to the desired test point.
- Click an up or down arrow to activate Rated Speed Override.
- Change speed in 10 RPM increments (auto-sent to ECM), or type a value and click Send.
Source: Cummins/Onan 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.