Pinpoint Test Ah: The AWD (All-Wheel Drive) Module Does Not Respond To The Diagnostic Scan Tool

Refer to Module Communications Network for schematic and connector information. Refer to All Wheel Drive (AWD) for schematic and connector information.
Normal Operation and Fault Conditions

The AWD module communicates on the HS-CAN1.

Possible Sources
- Fuse
- Wiring, terminals and connector
- AWD module
Visual Inspection and Pre-checks
- Verify BJB fuses 12 (15A) and FJ-CASE (40A) and High Current BJB fuse 4 (60A) are OK.

AH1 CHECK THE AWD (ALL-WHEEL DRIVE) MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Disconnect AWD module C4379.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4379-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to AH2

No	VERIFY BJB fuses 12 (15A) and FJ-CASE (40A) and High Current BJB fuse 4 (60A) are OK. If OK, repair the circuit in question. If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

AH2 CHECK THE AWD (ALL-WHEEL DRIVE) MODULE GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect negative battery cable.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4379-46	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	CONNECT negative battery cable. GO to AH3

No	REPAIR the circuit.

AH3 CHECK THE HS-CAN1 (HIGH-SPEED CONTROLLER AREA NETWORK 1) CIRCUITS BETWEEN THE AWD (ALL-WHEEL DRIVE) MODULE AND THE GWM (GATEWAY MODULE A) FOR AN OPEN

Disconnect GWM C2431.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4379-9	Courtesy of FORD MOTOR COMPANY	C2431-20
C4379-8	Courtesy of FORD MOTOR COMPANY	C2431-19

Are the resistances less than 3 ohms?

Yes	CONNECT the GWM, GO to AH4

No	REPAIR the circuit in question.

AH4 CHECK FOR CORRECT AWD (ALL-WHEEL DRIVE) MODULE OPERATION

Ignition OFF.

Disconnect and inspect the AWD module 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

Reconnect the AWD module 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 OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new AWD module. REFER to: All-Wheel Drive (AWD) Module

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.