P071D: Manual-override input consistency is separate from a high or low signal

P071D is broadly described as a transmission mode-switch B circuit in the generic dictionary. Ford's TR9070 table gives a more specific role: consistency of the manual-override switch input. The exact transmission therefore matters before the code is mapped to a physical switch.

An in-window signal can still need a consistency check

The table separates P071D from P071E and P071F, which are the manual-override input's out-of-window low and high categories. That distinction means a voltage that avoids a simple range fault does not by itself establish that the input is consistent with the controller's expected state.

The source does not publish the complete consistency algorithm or a numeric legal-state window here. Those missing values should not be invented from the neighboring codes.

Do not confuse manual override with a shift paddle

The same page lists upshift and downshift paddle inputs in separate diagnostic rows, with their own stuck, illegal-voltage and out-of-window codes. The manual-override classification cannot automatically be assigned to one of those paddles just because both affect manual shifting.

Preserve the full module result and available input-state information, then use the matching TR9070 procedure to establish the consistency comparison. The table does not identify a failed switch, connector or controller and supplies no universal external activation test. The useful evidence is the specific input role and failure category, bounded to this architecture.

Source and applicability

Ford 2024–2025 gasoline OBD summary, TR9070 DCT manual-override switch table only. The full consistency algorithm and vehicle-specific wiring are not provided by this summary. Ford PDF, page 164.