Pinpoint Test E : U3003:17

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.

E1 CHECK FOR HIGH VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES
- Ignition ON.
- Using a diagnostic scan tool, retrieve and record 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 PCM Diagnostic Trouble Codes (DTCs). REFER to: Electronic Engine Controls .

No GO to E2

E2 CHECK THE BATTERY VOLTAGE
- Turn off all interior lights, exterior lights and accessories.
- NOTE: Do not allow the engine speed to increase above 2, 000 RPM while performing this step or the generator may self-excite and result in default charging system output voltage. If engine speed goes above 2, 000 RPM, turn the vehicle off and restart the engine before performing this step.
  
  Start and run the engine at approximately 1, 500 RPM for 3 minutes while monitoring the battery voltage.
Is the battery voltage between 13 and 15.2 volts?

Yes GO to E3

No DIAGNOSE the overcharging condition. REFER to: Charging System .

E3 RECHECK FOR TBM (TRAILER BRAKE CONTROL MODULE) DTC (DIAGNOSTIC TROUBLE CODE) U3003:17

Turn the engine off.

Ignition ON.

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

Clear the TBM Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

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

Is DTC U3003:17 present?

Yes

GO to E4

No	The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

E4 VERIFY ALL WIRING CONNECTIONS

Disconnect BCM C2280A .

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 E5

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

E5 CHECK FOR CORRECT TBM (TRAILER BRAKE CONTROL MODULE) OPERATION

Connect BCM C2280A . Make sure it seats and latches correctly.

Connect TBM C2142 . Make sure it seats and latches correctly.

Operate the system and verify 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 TBM module. REFER to:Trailer Brake Control Module (TBM) .

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.