O2 CHECK THE COMMUNICATION NETWORK
Do the BCM, PCM and the FCIM pass the Network Test?
Yes | GO to O3 | |
|---|---|---|
No | DIAGNOSE the BCM, PCM or FCIM does not communicate with the diagnostic scan tool. REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing). | |
O3 CHECK THE PCM (POWERTRAIN CONTROL MODULE) A/C (AIR CONDITIONING) REQUEST SIGNAL (AC_REQ) PID (PARAMETER IDENTIFICATION)
Start the engine. Using a diagnostic scan tool, monitor the PCM AC_REQ PID. On the HVAC controls, select PANEL mode, then press the A/C button (indicator ON).
Does the AC_REQ PID display YES when the A/C button indicator is illuminated?
Yes | GO to O7 | |
|---|---|---|
No | GO to O4 | |
O4 CHECK THE FCIM (FRONT CONTROLS INTERFACE MODULE) A/C (AIR CONDITIONING) SWITCH (CC_SW_AC) PID (PARAMETER IDENTIFICATION)
Using a diagnostic scan tool, monitor the FCIM CC_SW_AC PID while pressing and releasing the A/C button.
Does the PID display Active when the A/C button indicator is illuminated?
Yes | GO to O6 | |
|---|---|---|
No | GO to O5 | |
O5 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?
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 module connections. ADDRESS the root cause of any connector or pin issues. | |
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.