Pinpoint Test S : U0140:08

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: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.

S1 VERIFY THE CUSTOMER CONCERN

Ignition ON.

Verify there is an observable symptom present.

Is an observable symptom present?

Yes	CLEAR the DTC. The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition

GO to S2

S2 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Using a diagnostic scan tool, carry out the network test.
Does the GWM pass the network test?

Yes GO to S3

No REFER to: MODULE COMMUNICATIONS NETWORK (1 OF 2) or MODULE COMMUNICATIONS NETWORK (2 OF 2) .

S3 PERFORM THE SCCM (STEERING COLUMN CONTROL MODULE) SELF-TEST
- Using a diagnostic scan tool, carry out the SCCM self-test.
Are any non-network Diagnostic Trouble Codes (DTCs) present?

Yes REFER to SCCM DTC Chart .

No GO to S4

S4 CHECK THE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, carry out the BCM self-test.
Are any non-network Diagnostic Trouble Codes (DTCs) present?

Yes REFER to:MODULE COMMUNICATIONS NETWORK (1 OF 2) or MODULE COMMUNICATIONS NETWORK (2 OF 2) .

No GO to S5

S5 RECHECK THE SCCM (STEERING COLUMN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, clear the SCCM Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Wait 10 seconds.

Using a diagnostic scan tool, perform the continuous memory self-test.

Using a diagnostic scan tool, check the SCCM Diagnostic Trouble Codes (DTCs).

Is DTC U0140:00 present?

Yes

GO to S6

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic, or an intermittent fault condition.

S6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN

NOTE: If new modules were installed prior to the DTC being set, the module configuration can be incorrectly set during the PMI, or the PMI may not have been carried out.

CHECK the vehicle service history for recent service actions related to the GWM or SCCM. If recent service history is found:
- verify correct replacement module was installed
  - HVBOM may be used to verify the correct replacement module was installed
- verify the configuration of replacement module was correct
  - re-configure module using as-built data if prior configuration is suspect
- verify the module was not obtained from a similar vehicle and installed into customer vehicle
  - return the swapped module to source vehicle and obtain the correct replacement module
  - if a new replacement module is installed, PERFORM PMI using as-built data
- Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?

Yes

GO to S7

No	The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

S7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all BCM 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 BCM 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 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, BCM guided routine is not applicable for this vehicle and market. Replace the component that was faulted through service information diagnosis.

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.