Pinpoint Test C : Transmission Control Switch: Notes
WARNING: This page is about a different car, the 2015 Ford C-Max. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic Overview
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
Refer to SHIFT INTERLOCK for schematic and connector information.
Transmission Control Switch
Normal Operation and Fault Conditions
The TCS is a momentary contact switch located on the selector lever knob. Pressing the TCS will engage or disengage the Grade Assist function of the transmission. When Grade Assist is engaged, the Grade Assist icon will illuminate on the IPC.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P1780 | Transmission Control Switch (O/D Cancel) Circuit Out Of Self-Test Range | The TCS/Grade Assist switch or circuit failed during the self-test. |
Possible Sources
- Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
- Fuse 85 (7.5A)
- TCS/Grade Assist switch
- PCM