Inspection And Verification

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices.

Fig 1: High-Current Battery Junction Box Connector - C1617B

Courtesy of FORD MOTOR CO.

CONNECTOR PIN REFERENCE (HARNESS SIDE)

Circuit	Pin
B+ (Battery Positive Voltage) - SBF02	1 (YELLOW/RED)

Fig 2: PSCM-A Connector - C2368A

Courtesy of FORD MOTOR CO.

CONNECTOR PIN REFERENCE (HARNESS SIDE)

Circuit	Pin
CAN- (Controller Area Network) - VDB05	6 (WHITE)
CAN+ (Controller Area Network) - VDB04	2 (WHITE/BLUE)
IGN START/RUN (Ignition START/RUN) - CBP21	5 (BLUE/GRAY)

Fig 3: PSCM-B Connector - C2368B

Courtesy of FORD MOTOR CO.

CONNECTOR PIN REFERENCE (HARNESS SIDE)

Circuit	Pin
GND (Ground) - GD114	1 (BLACK/BLUE)

Fig 4: PSCM-C Connector - C2368C

Courtesy of FORD MOTOR CO.

CONNECTOR PIN REFERENCE (HARNESS SIDE)

Circuit	Pin
B+ (Battery Positive Voltage) - SBF02	1 (YELLOW/RED)

IV1: VISUAL INSPECTION

NOTE: If equipped, the Lane Keeping System (LKS) can interfere with accurate EPAS diagnostics. Disable the Lane Keeping System (LKS) before test driving the vehicle to diagnose EPAS concerns. For information on disabling the Lane Keeping System (LKS), refer to the Owner's Literature.

Verify the customer concern. Diagnose all PSCM DTCs before diagnosing any steering symptoms.
Visually inspect the EPAS system for obvious signs of mechanical or electrical damage.

NOTE: When inspecting the bellows boots make sure to use a strong light source and an inspection mirror.

VISUAL INSPECTION CHART

Mechanical	Electrical
Tire pressure	High-current BJB fuse 2 (60A)
Tire condition and wear	SJB fuse 21 (7.5A)
Binding or misaligned steering column	Wiring, terminals or connectors
Loose steering column shaft bolts
Steering column shaft couplings and U-joints
Steering column shaft dash seal
Steering gear
Steering gear bellows boots
Inner tie rod ends
Outer tie rod ends

Is an obvious cause for an observed or reported concern found?

Yes	No
REPAIR as necessary.	Go to KNOWN CONCERNS

IV2: DAMAGED STEERING GEAR BELLOWS BOOT

Was a damaged steering gear bellows boot identified during the visual inspection?

Yes	No
Go to IV3.	REPAIR the concern identified during the visual inspection.

IV3: ISOLATE THE DAMAGED BOOT(S) AS THE CONCERN

Review the repair order and verify there are no customer concerns (such as a message on the message center or NVH steering system concern) in addition to the damaged boot(s).

Are any other customer concerns present?

Yes	No
Make note of the damaged boot(s). Go to KNOWN CONCERNS After diagnosis is complete, if a new EPAS gear or bellows boot has not been installed, Go to PINPOINT TEST K .	Go to PINPOINT TEST K .