Pinpoint Test A : U3003:16

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.

A1 RECHECK THE VDM (VEHICLE DYNAMICS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, clear the VDM Diagnostic Trouble Codes (DTCs).
- Ignition OFF.
- Ignition ON.
- Using a diagnostic scan tool, carry out the VDM self-test.
Is DTC U3003:16 still present?

Yes GO to A2

No The system is operating correctly at this time. The DTC may have set due to a previous low battery voltage condition.

A2 CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) IN THE PCM (POWERTRAIN CONTROL MODULE)
- Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM?

Yes DIAGNOSE the vehicle charging concern. REFER to:CHARGING SYSTEM - GENERAL INFORMATION .

No GO to A3

A3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
- Carry out the Battery Condition Test. REFER to: Battery .
Did the battery pass the condition test?

Yes GO to A4

No INSTALL a new battery. REFER to: Battery .

A4 CHECK THE VDM (VEHICLE DYNAMICS CONTROL MODULE) VOLTAGE (SW_IGN_V_VDM) PID (PARAMETER IDENTIFICATION)
- Ignition ON.
- Measure and record the voltage at the battery.
- Using a diagnostic scan tool, monitor the SW_IGN_V_VDM PID.
Is the PID display within 0.2 volt of the recorded battery voltage?

Yes GO to A8

No GO to A5

A5 CHECK THE VDM (VEHICLE DYNAMICS CONTROL MODULE) VOLTAGE SUPPLY

Ignition OFF.

Disconnect VDM C3672A .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3672A-1	Courtesy of FORD MOTOR COMPANY	Ground

Positive Lead	Measurement / Action	Negative Lead
C3672A-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage within 1 volt of the recorded battery voltage?

Yes

GO to A6

No	VERIFYBCM fuse 36 (15A) is OK. If OK, REPAIR the affected circuit for high resistance or an open. If not OK, Refer to the Wiring Diagram Information to identify the cause of the circuit short.

A6 CHECK THE VDM (VEHICLE DYNAMICS CONTROL MODULE) GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect VDM C3672A .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3672A-11	Courtesy of FORD MOTOR COMPANY	Ground

Positive Lead	Measurement / Action	Negative Lead
C3672A-12	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to A7

No	REPAIR the circuit.

A7 VERIFY ALL WIRING CONNECTIONS

Ignition OFF.

Disconnect BCM C2280C .

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 A8

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

A8 CHECK FOR CORRECT VDM (VEHICLE DYNAMICS CONTROL MODULE) OPERATION

Connect BCM C2280C . Make sure it seats and latches correctly.

Connect VDM C3672A and C3672B . 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 Technical Service Bulletins (TSBs) exist for this concern, INSTALL a new VDM module. REFER to:Vehicle Dynamics Control Module (VDM) .

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.