Pinpoint Test S : The Hill Descent Control™ System Is Inoperative Or Cannot Be Disabled

WARNING: This page is about a different car, the 2017 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

S1 CHECK FOR IPC (INSTRUMENT PANEL CLUSTER) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON.

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

Are there any Diagnostic Trouble Codes (DTCs) in the IPC?

Yes	DIAGNOSE all IPC Diagnostic Trouble Codes (DTCs). Refer to: Instrumentation, Message Center and Warning Chimes .

No	If the IPC does not communicate with the diagnostic scan tool, Refer to: Communications Network . If the IPC does communicate with the diagnostic scan tool and there are no Diagnostic Trouble Codes (DTCs) present, GO to S2

S2 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, carry out the ABS module self-test.
Are there any "lost communication" or "invalid data" Diagnostic Trouble Codes (DTCs) other than U0401:86 present in the ABS module?

Yes DIAGNOSE all ABS module "lost communication" and "invalid data" Diagnostic Trouble Codes (DTCs)

No GO to S3

S3 CHECK THE HILL DESCENT CONTROL™ SWITCH

Ignition OFF.

Disconnect center stack switch assembly C2114 .

Measure component side while pressing and releasing the Hill Descent Control™ switch:

Positive Lead	Measurement / Action	Negative Lead
C2114-4component side	Courtesy of FORD MOTOR COMPANY	C2114-3component side

Is the resistance less than 3 ohms with the switch pressed and greater than 10, 000 ohms with the switch released?

Yes

GO to S4

No	INSTALL a new Hill Descent Control™ switch. Refer to: Stability Assist/Traction Control Switch .

S4 CHECK THE HILL DESCENT CONTROL™ SWITCH GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2114-3	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to S5

No	REPAIR the circuit.

S5 CHECK THE HILL DESCENT CONTROL™ SWITCH SIGNAL CIRCUIT FOR AN OPEN

Disconnect IPC C220 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2114-4	Courtesy of FORD MOTOR COMPANY	C220-7

Is the resistance less than 3 ohms?

Yes

GO to S6

No	REPAIR the circuit.

S6 CHECK THE HILL DESCENT CONTROL™ SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2114-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to S7

No	REPAIR the circuit.

S7 VERIFY ALL WIRING CONNECTIONS
- Ignition OFF.
- Disconnect IPC C220 .
- Disconnect all in-line electrical connectors between the IPC and the center stack switch assembly.
- Using a good light source, inspect all disconnected electrical connectors for the following:
  - corrosion - install new connector or terminal and clean the module pins
  - damaged or bent pins - install new terminals or pins
  - pushed-out pins - install new pins as necessary
  - spread terminals - install new terminals as necessary
Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals?

Yes GO to S8

No REPAIR the affected connectors or terminals. Refer to Connector Repair Procedures for schematic and connector information.

S8 CHECK FOR CORRECT IPC (INSTRUMENT PANEL CLUSTER) OPERATION

Connect center stack switch assembly C2114 . Make sure it seats and latches correctly.

Connect IPC C220 . Make sure it seats and latches correctly.

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

Is the concern is still present?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to IPC Hardware Testing .

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.