Is any voltage present?
Yes | REPAIR the circuit. | |
|---|---|---|
No | GO to L5 | |
L5 CHECK THE BLOWER MOTOR OPERATION WITH THE BLOWER MOTOR RELAY DISCONNECTED
Connect FCIM C2402A. Ignition OFF. Connect Blower motor speed control C297. Ignition ON. Operate the system and determine if the concern is still present.
Does the fan still operate all the time?
Yes | REPAIR the blower motor speed control voltage circuit CH402 (YE/GN) for a short to voltage. | |
|---|---|---|
No | GO to L6 | |
L6 CHECK FOR CORRECT BLOWER MOTOR SPEED CONTROL OPERATION
Ignition OFF. Disconnect and inspect all the blower motor speed control 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 blower motor speed control 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 | INSTALL a new blower motor speed control. REFER to: Blower Motor Speed Control (412-00 Climate Control System - General Information, Removal and Installation). TEST the system for normal operation. If the concern is still present, GO to L7 | |
|---|---|---|
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. | |
L7 CHECK FOR CORRECT FCIM (FRONT CONTROLS INTERFACE MODULE) OPERATION
Ignition OFF. Disconnect and inspect all FCIM 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 all FCIM connectors. Make sure they seat and latch correctly. Operate the system and determine if the concern is still present.
Is the concern still present?
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.