Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C232-1 | C232-5 | |
C232-1 | C232-6 | |
C232-2 | C232-3 | |
C232-2 | C232-5 | |
C232-2 | C232-6 | |
C232-3 | C232-5 | |
C232-3 | C232-6 | |
C232-5 | C232-6 |
Are the resistances greater than 10,000 ohms?
Yes | INSTALL a new air distribution door actuator, REFER to: Air Distribution Door Actuator (412-00 Climate Control System - General Information, Removal and Installation). TEST the system for normal operation. If the concern is still present, GO to E5 | |
|---|---|---|
No | REPAIR the circuit. | |
E5 CHECK FOR CORRECT FCIM (FRONT CONTROLS INTERFACE MODULE) OPERATION
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?
Yes | CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new FCIM. Refer to the appropriate section in Group 415 for the procedure. | |
|---|---|---|
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. | |
Insufficient, Erratic Or No Heat
Normal Operation and Fault Conditions
When the engine is at operating temperature hot coolant flows from the coolant pump through the heater core and back to the coolant pump. Correct coolant temperatures are critical for good heater performance.
Possible Sources
Wiring, terminals or connectors Temperature door actuator(s) Air trapped in the coolant system
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.