P0694: Fan2 high-control monitoring reports a short-to-power category

P0694 is the high circuit classification for fan 2 in Ford’s diesel monitor. The source specifically associates it with a short-to-power condition detected by the secondary electric cooling-fan relay. The word “high” describes electrical fault direction, not excessive fan speed or high coolant temperature.

The relay check can register a short event

Monitoring is continuous and the published typical duration is 0.5 second. A later normal relay or fan response therefore does not demonstrate that the earlier eligible electrical event did not occur.

The adjacent P0693 entry covers an open or short-to-ground category. Keeping that difference intact matters when selecting a circuit investigation: the two codes cannot be treated as interchangeable evidence merely because they concern the same secondary fan.

Relate the report to the commanded state

Preserve the code, fan/relay identity, requested operation and available electrical status. Observing fan movement alone does not localize the short-to-power classification, and a temperature complaint does not establish the control fault’s origin.

Ford does not provide a universal voltage threshold or connector pin in this summary. The actual circuit procedure is needed to distinguish wiring, relay, connected-load and control-electronics evidence. The monitor description cannot independently justify a fan replacement or identify a particular physical short from the code title.

Source and applicability

Ford 2023–2024 diesel OBD summary, August 25, 2023 revision; only the described monitor examples. Confirm the engine and calibration before applying values. The monitor explanation does not identify a failed part or replace the applicable service procedure. Ford PDF, page 117.