Description | Fault Trigger Conditions | |||
|---|---|---|---|---|
DTC | ||||
U3000:49 | Control Module: Internal Electronic Failure | This DTC sets when the BCM has permanently shut down the output driver. The module has permanently disabled an output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the BCM can withstand. CORRECT the cause of the excessive current draw before installing a new BCM. | ||
Possible Sources
Wiring, terminals or connectors LH steering column multifunction switch Headlamp assembly SCCM BCM
Visual Inspection and Diagnostic Pre-checks
Inspect the headlamp assembly for damage.
PINPOINT TEST C : ONE OR BOTH HIGH BEAMS IS INOPERATIVE
C1 CHECK THE LOW BEAM OPERATION
Ignition ON. Place the headlamp switch in the HEADLAMPS ON position. Place the LH steering column multifunction switch in the high beam position and observe the headlamps. Place the LH steering column multifunction switch in the low beam position and observe the headlamps.
Do the low beams illuminate?
Yes | If an individual high beam is inoperative, GO to C3 If both high beams are inoperative, GO to C2 |
|---|---|
No | Except China, GO to Pinpoint Test A China only, GO to Pinpoint Test B |
C2 CHECK THE LH (LEFT-HAND) MULTIFUNCTION SWITCH INPUT
Using a diagnostic scan tool, view SCCM Parameter Identifications (PIDs). Monitor the SCCM High Beam Switch (HIGH_BEAM_SW) PID while placing the LH steering column multifunction switch in the HIGH BEAM and LOW BEAM positions.
Do the PID values agree with the LH steering column multifunction switch position?
Yes | GO to C8 |
|---|---|
No | INSTALL a new LH steering column multifunction switch. REFER to: Steering Column Multifunction Switch LH (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). TEST the system for normal operation. If the concern still exists, GO to C7 |
C3 CHECK FOR VOLTAGE FROM THE HEADLAMP HIGH BEAM CIRCUIT
Ignition OFF. Place the headlamp switch in the OFF position. Disconnect: Inoperative LH Headlamp C1021 or RH Headlamp C1041. Ignition ON. Place the headlamp switch in the HEADLAMPS position and the LH steering column multifunction switch in
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.