Pinpoint Test B : GSM (Gearshift Module): Notes
WARNING: This page is about a different car, the 2015 Lincoln MKZ. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic Overview
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to: Diagnostic Methods .
Refer to Transmission Controls for schematic and connector information.
Normal Operation and Fault Conditions
The GSM and the TRCM communicate on the HS-CAN but use a redundant PWM hard wired system as a backup. If the HS-CAN system fails the GSM and TRCM communicate via this hard wired system.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P07F2 | Transmission Range Control Module Communication Circuit | The GSM detects a voltage signal out of calibrated range. |
| P07F3 | Transmission Range Control Module Communication Circuit Low | The GSM detects a voltage low signal. Circuit shorted to ground. |
| P07F4 | Transmission Range Control Module Communication Circuit High | The GSM detects a voltage high signal. Circuit open or shorted to power. |
Possible Sources
- Connectors damaged or pushed-out terminals, circuitry open, shorted to power or shorted to ground
- BJB fuse 76 (20A)
- BJB fuse 23 (15A)
- TRCM