Pinpoint Test A : The Lane Keeping System Does Not Turn On Or Activate

WARNING: This page is about a different car, the 2018 Lincoln Navigator. 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. Use only Rotunda Flex Probes (NUD105-R025D)

A1 VERIFY THE CONCERN

Verify the operation of the lane keeping system (lane keeping aid and lane keeping alert).

Does the lane keeping system operate correctly?

Yes	The system is operating correctly at this time. The concern may have been caused by high network traffic or the driver's perception of how the lane keeping system operates. REFER to the Owner's Literature.

GO to A2

A2 PERFORM A NETWORK TEST
- Ignition ON.
- Using a diagnostic scan tool, perform a network test.
Do all modules pass the network test?

Yes GO to A3

No REFER to: Communications Network .

A3 CHECK THE IPMA (IMAGE PROCESSING MODULE A) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, check the IPMA Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) present?

Yes For DTC B134A:14 GO to A12
For all other Diagnostic Trouble Codes (DTCs), REFER to IPMA DTC Chart .

No GO to A4

A4 CHECK THE PSCM (POWER STEERING CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, check the PSCM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) present?

Yes REFER to: Power Steering .

No GO to A5

A5 CHECK THE SCCM (STEERING COLUMN CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, check the SCCM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) present?

Yes Refer to:STEERING WHEEL AND COLUMN ELECTRICAL COMPONENTS

No GO to A6

A6 CHECK THE BCM (BODY CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, check the BCM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) present?

Yes REFER to: Body Control Module (BCM) .

No GO to A7

A7 CHECK THE CCM (CRUISE CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, check the CCM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) present?

Yes REFER to: Cruise Control .

No GO to A8

A8 CHECK THE IPC (INSTRUMENT PANEL CLUSTER) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, check the IPC Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) present?

Yes REFER to: Instrumentation, Message Center and Warning Chimes .

No GO to A9

A9 CHECK THE RCM (RESTRAINTS CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, check the RCM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) present?

Yes REFER to:Airbag Supplemental Restraint System (SRS) .

No GO to A10

A10 CHECK THE PCM (POWERTRAIN CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

Using a diagnostic scan tool, check the PCM Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Are any Diagnostic Trouble Codes (DTCs) present?

Yes	Diagnose the PCM Diagnostic Trouble Codes (DTCs). SEE Electronic Engine Control. PCM DTC Chart. REFER to: Electronic Engine Controls .

GO to A11

A11 CHECK THE GWM (GATEWAY MODULE A) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) present?

Yes DIAGNOSE the GWM Diagnostic Trouble Codes (DTCs). REFER to: Communications Network .

No GO to A12

A12 VERIFY THE IPMA (IMAGE PROCESSING MODULE A) LANE KEEPING SYSTEM SWITCH PID (PARAMETER IDENTIFICATION)
- Using a diagnostic scan tool, view the IPMA lane keeping system switch PID: (LKS_SW_ST).
- While monitoring the PID, press and release the lane keeping system switch several times.
Does the PID consistently match the switch position?

Yes GO to A17

No GO to A13

A13 CHECK THE LANE KEEPING SYSTEM SWITCH CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect: Lane Keeping System Switch C3466 .

Disconnect: IPMA C9224 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3466-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to A14

No	REPAIR the circuit.

A14 CHECK THE LANE KEEPING SYSTEM SWITCH CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3466-2	Courtesy of FORD MOTOR COMPANY	C9440-12

Is the resistance less than 3 ohms?

Yes

GO to A15

No	REPAIR the circuit.

A15 CHECK THE LANE KEEPING SYSTEM SWITCH GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C9440-3	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to A16

No	REPAIR the circuit.

A16 CHECK THE LANE KEEPING SYSTEM SWITCH OPERATION

Connect: Lane Keeping System Switch C3466 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C9440-12	Courtesy of FORD MOTOR COMPANY	Ground

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

Yes

GO to A17

No	INSTALL a new lane keeping system switch. Refer to EXTERIOR LIGHTING (2 OF 2) .

A17 CHECK FOR CORRECT IPMA (IMAGE PROCESSING MODULE A) OPERATION

Ignition OFF.

Disconnect and inspect the IPMA 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 IPMA 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 IPMA. REFER to: Image Processing Module A (IPMA) .

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.