Pinpoint Test B: P0563

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Wiring Diagrams TRANSMISSION CONTROLS - 10R80 for schematic and connector information.

Normal Operation and Fault Conditions

The GSM requires an operating voltage between 9 and 16 volts. The GSM is supplied voltage through a fused circuit from the BCM and has a single ground circuit. An inoperative charging system or overcharging condition may result in the GSM setting a DTC.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
GSM P0563: 00	System Voltage High: No Sub Type Information	This DTC indicates the voltage supplied to the GSM rose above 16 volts. This DTC may set during battery charging and jump starting events.

Possible Sources

Charging system concern
Battery charging or jump starting event
Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
GSM

B1 CHECK FOR HIGH VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) IN OTHER MODULES
- Using a diagnostic scan tool, retrieve all continuous memory diagnostic trouble codes (CMDTCs) from all modules.
Are any high voltage diagnostic trouble codes (DTCs) present in other modules?

Yes DIAGNOSE the vehicle charging concern. REFER to: Charging System - 2.7L EcoBoost (238kW/324PS)/3.5L EcoBoost (BM) .

No GO to B2

B2 CHECK THE BATTERY VOLTAGE
- Using a diagnostic scan tool, clear all GSM diagnostic trouble codes (DTCs).
- Turn off all interior lights, exterior lights and accessories.
- NOTE: Do not allow the engine speed to increase above 2, 000 RPM while performing this step or the generator may self-excite and result in default charging system output voltage. If engine speed goes above 2, 000 RPM, turn the engine off and restart the engine before performing this step.
  
  Start and run the engine at approximately 1, 500 RPM for 3 minutes while monitoring the battery voltage.
Does the battery voltage stay between 13 and 15.2 volts?

Yes GO to B3

No DIAGNOSE the overcharging condition. REFER to: Charging System - 2.7L EcoBoost (238kW/324PS)/3.5L EcoBoost (BM) .

B3 RECHECK THE GSM (GEAR SHIFT MODULE) FOR DTC (DIAGNOSTIC TROUBLE CODE) P0563

NOTE: If a GSM self-test is carried out, the driver door must be fully closed. A false P166B DTC may set if the driver door is not fully closed during the self-test.

Ignition OFF.

Ignition ON.

Using a diagnostic scan tool, carry out the GSM self-test.

Is DTC P0563 present?

Yes

GO to B4

No	The system is operating properly at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

B4 CHECK FOR CORRECT GSM (GEAR SHIFT MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the GSM connector.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Connect the GSM connector. Make sure it seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK for an applicable TSB, GSB, SSM, or FSA. If a service bulletin exists for this concern, discontinue this test and follow bulletin instructions. If none address this concern, INSTALL a new GSM. REFER to: Gear Shift Module (GSM) - Vehicles With: Column Shift .

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.