Pinpoint Test Ai : The Gearshift Module (GSM) Does Not Respond To The Diagnostic Scan Tool

WARNING: This page is about a different car, the 2016 Lincoln MKX. However, it is still accessible from the selected car via links, so may be relevant.

AI1 CHECK THE GSM (GEARSHIFT MODULE) VOLTAGE SUPPLY CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect: GSM C3532 .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3532-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to AI2

No	VERIFY the BCM fuse 12 (7.5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

AI2 CHECK THE GSM (GEARSHIFT MODULE) GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3532-9	Courtesy of FORD MOTOR COMPANY	Ground
C3532-18	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to AI3

No	REPAIR the circuit.

AI3 CHECK THE HS-CAN2 (HIGH SPEED-CONTROLLER AREA NETWORK 2) CIRCUITS BETWEEN THE GSM (GEARSHIFT MODULE) AND THE DLC (DATA LINK CONNECTOR) FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3532-3	Courtesy of FORD MOTOR COMPANY	C251-3
C3532-2	Courtesy of FORD MOTOR COMPANY	C251-11

Are the resistances less than 3 ohms?

Yes

GO to AI4

No	REPAIR the circuit in question.

AI4 CHECK FOR CORRECT GSM (GEARSHIFT MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the GSM connector and related in-line connectors.

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

Reconnect the GSM connector and related in-line connectors. Make sure they seat and latch correctly.

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

Is the concern still present?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new GSM. Refer to: Gearshift Module (GSM) .

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