2797 7
UnclassifiedFuel
What This Code Means
Short circuit to Battery (SCB); Short circuit to Ground (SCG); Overload error; Positive deviation between required and measured position; Jammed Valve; Hardware errors in the injectors; Hardware errors in ECM power stages; Over current; Command collision; RAM error; Short circuit; Overload failure
Possible Causes
- •Electric failure in the Power stage of electric EGR Valve actuator (H-Bridge)
- •Failure near the actuator with a wiring length > 1m
- •Blocked EGR Valve actuator
- •Injector hardware malfunction
- •ECM power stage hardware malfunction
- •Electric failure in H-Bridge power stage of electric EGR Valve actuator
- •Wiring length > 1m with failure occurring near the actuator
- •Blocked actuator
- •Hardware errors in the injectors
- •Hardware errors in the respective ECM power stages
Suggested Actions
- 1Perform a plausibility check by closing the switch (Low side in case of SCB, High side in case of SCG). If the Short Circuit failure disappears, clear it and activate the Overload failure.
- 2System attempts to automatically unblock the actuator by closing or opening it rapidly
- 3Use diagnostic pattern detection (bit mask) to identify specific errors and trigger appropriate substitute reactions
- 4System performs a plausibility check by closing the switch (low side in case of SCB, high side in case of SCG) to clear the short circuit and activate the overload failure
- 5System attempts to unblock the actuator by opening or closing it rapidly
- 6Diagnostic procedure uses pattern detection (matching measured and reference patterns in a bit mask) to identify specific errors
- 7Trigger appropriate substitute reaction
Related Winco Fault Codes
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