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Pinpoint Test C : DTC (Diagnostic Trouble Code) P1780: Notes

WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to TRANSMISSION CONTROLS for schematic and connector information.

Normal Operation 

The transmission control switch is a momentary contact switch located on the selector lever. When the switch is pressed the contacts close sending a voltage signal to the PCM and notifies the module to disable the overdrive gear. The PCM sends a message over the MS-CAN to the IPC which illuminates the tow haul indicator light in the IPC. When the switch is depressed again sportmode is enabled, a third button push enables the overdrive gear in the transmission and sends a message to the IPC extinguishing the tow haul light.

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
P1780 Transmission Control Switch (O/D Cancel) Circuit Out of Self-Test Range This DTC sets when the transmission control switch circuit self test is out of range (runs during KOER on-demand self-test only).

Possible Sources 

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