H4 CHECK THE FCIM (FRONT CONTROLS INTERFACE MODULE) A/C (AIR CONDITIONING) SWITCH STATUS (CC_SW_AC) PID (PARAMETER IDENTIFICATION)
Does the PID display Active when pressed and Inactive when released?
Yes | GO to H5 | |
|---|---|---|
No | GO to H8 | |
H5 CHECK THE A/C (AIR CONDITIONING) PRESSURE SENSOR (ACP_PRESS) PARAMETER IDENTIFICATION (PID)
Using a diagnostic scan tool, view the PCM Parameter Identification (PIDs). With a manifold gauge set connected, compare the pressure readings of the manifold gauge set and the PCM Parameter Identification (PID) ACP_PRESS.
Are the pressure values of the manifold gauge set and the ACP_PRESS PCM PID within ± 103 kPa (15 psi)?
Yes | GO to H6 | |
|---|---|---|
No | INSTALL a new A/C pressure transducer. REFER to: Air Conditioning (A/C) Pressure Transducer (412-00 Climate Control System - General Information, Removal and Installation). | |
H6 CHECK THE PCM (POWERTRAIN CONTROL MODULE) A/C (AIR CONDITIONING) REQUEST SIGNAL (AC_REQ) PID (PARAMETER IDENTIFICATION) WITH THE A/C (AIR CONDITIONING) OFF
Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs). Monitor the AC_REQ PID. While in panel mode, release the A/C button (indicator off) on the FCIM controls.
Does the PID display No?
Yes | GO to H9 | |
|---|---|---|
No | GO to H7 | |
H7 CHECK THE PCM (POWERTRAIN CONTROL MODULE) A/C (AIR CONDITIONING) REQUEST SIGNAL (AC_REQ) PID (PARAMETER IDENTIFICATION) WITH FCIM (FRONT CONTROLS INTERFACE MODULE) DISCONNECTED
Ignition ON. Disconnect FCIM C2402A. Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs). Monitor the AC_REQ PID.
Does the PID display No?
Yes | GO to H9 | |
|---|---|---|
No | GO to H8 | |
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.