11-35
OVERPRIME FAULT – FAULT CODE 57
WARNING
Some genset service procedures present hazards that can result in severe personal injury
or death. Only trained and experienced persons with knowledge of fuels, electricity, and machinery
hazards should perform genset service. See Safety Precautions.
Logic: Genset priming: 3 consecutive minutes
Possible Causes: Wiring harness, faulty switch, AGS
Diagnosis & Repair:
1. Verify that Last Fault is FC 57: Yes, continue diagnosis; No, troubleshoot actual last fault.
2. Check for an object holding switch in stop position: remove object.
3. Disconnect genset control P1 connector, verify P1 pins are fully inserted and inspect pin condition per
PSB–676: insert, repair or replace pins as necessary.
4. Reconnect P1 connector and test run genset for fault occurrence: repair or replace pins in connector as
necessary.
5. Measure for continuity change across start/stop switch between neutral and stop position at switches and
P1 connector: replace switches as necessary or disconnect external stop device if so equipped.
6. Dealers contact Distributor for technical support, Distributors contact factory for technical support.
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