Pinpoint Test U : U3006:1C

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.

U1 CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) IN THE BCM (BODY CONTROL MODULE)
- Ignition ON.
- Using a diagnostic scan tool, perform the BCM self-test.
Are any charging system Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to DTC Chart: Body Control Module (BCM) .

No GO to U2

U2 CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES
- Ignition ON.
- Using a diagnostic scan tool, retrieve all Diagnostic Trouble Codes (DTCs).
Are any charging system Diagnostic Trouble Codes (DTCs) recorded?

Yes DIAGNOSE the charging system concern. REFER to: Charging System . GO to U3

U3 CHECK THE BATTERY VOLTAGE

Turn off all interior/exterior lights and accessories.

Start and run the engine at approximately 2, 000 rpm for 3 minutes while monitoring the battery voltage.

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Does the battery voltage rise to 16 volts or higher?

Yes	DIAGNOSE the charging system concern. REFER to: Charging System .

GO to U4

U4 RECHECK THE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

Ignition ON.

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

Wait 10 seconds.

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

Is DTC U3006:1C present?

Yes

GO to U5

No	The system is operating correctly at this time. The DTC may have been caused by module connections or may have been set previously during battery charging or while jump starting the vehicle. ADDRESS the root cause of any connector or pin issues.

U5 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

Check the battery condition and verify the battery is fully charged. REFER to: Battery .

Is the battery OK and fully charged?

Yes

GO to U6

No	If the battery is discharged, DIAGNOSE the cause of the low battery condition. REFER to: Charging System . If the battery condition fails, INSTALL a new battery. REFER to: Battery .

U6 COMPARE THE BCM (BODY CONTROL MODULE) BATTERY VOLTAGE (VPWR) PID (PARAMETER IDENTIFICATION) WITH THE ACTUAL BATTERY VOLTAGE

Start the engine.

Turn on accessories (climate control blower on high speed, exterior lights).

With the engine running at idle, measure and record battery voltage:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY

Using a diagnostic scan tool, view the BCM PID VPWR.

Is the recorded battery voltage within 0.2 volt of the PID?

Yes

GO to U9

GO to U7

U7 CHECK THE BCM (BODY CONTROL MODULE) VOLTAGE SUPPLY CIRCUIT

Ignition OFF.

Disconnect BCM C2280G .

Disconnect BCM C2280H .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280G-17	Courtesy of FORD MOTOR COMPANY	Ground
C2280G-21	Courtesy of FORD MOTOR COMPANY	Ground
C2280G-22	Courtesy of FORD MOTOR COMPANY	Ground

Positive Lead	Measurement / Action	Negative Lead
C2280H-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage within 0.2 volt of the recorded battery voltage?

Yes

GO to U8

No	REPAIR the circuit for high resistance.

U8 CHECK THE BCM (BODY CONTROL MODULE) PROCESSOR GROUNDS

Ignition OFF.

Disconnect BCM C2280C .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280C-6	Courtesy of FORD MOTOR COMPANY	Ground
C2280C-7	Courtesy of FORD MOTOR COMPANY	Ground
C2280C-10	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances less than 3 ohms?

Yes

GO to U9

No	REPAIR the circuit in question for high resistance.

U9 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all BCM electrical connection(s) (harness side connectors and module terminals).

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 all BCM electrical connection(s). 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.