Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) — 2016 workshop reference 3548

No	INSTALL a new heater core. REFER to: Heater Core (412-00 Climate Control System - General Information, Removal and Installation).

The A/C Is Inoperative

Refer to Wiring Diagrams Cell 54 for schematic and connector information.

Normal Operation and Fault Conditions

Control System Logic REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

Possible Sources

Wiring, terminals or connectors Communication network Ambient Air Temperature (AAT) sensor A/C pressure transducer Evaporator temperature sensor Electric cooling fan Intake Air Temperature (IAT) or other temperature sensors Active grille shutters FCIM PCM

Visual Inspection and Diagnostic Pre-checks

Inspect BJB fuses 23 (10A) and 42 (15A).

PINPOINT TEST G : THE A/C (AIR CONDITIONING) IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

G1 CHECK THE A/C (AIR CONDITIONING) SYSTEM PRESSURE

Ignition OFF. With the R-134a manifold gauge set connected, check the A/C system pressure.

Is the A/C system pressure above 290 kPa (42 psi)?

Yes	GO to G2
No	CHECK the A/C system for leaks. REFER to: Electronic Leak Detection (412-00 Climate Control System - General Information, General Procedures). REFER to: Fluorescent Dye Leak Detection (412-00 Climate Control System - General Information, General Procedures). After leak is repaired, RECHARGE the A/C system. REFER to: Air Conditioning (A/C) System Recovery, Evacuation and Charging (412-00 Climate Control System - General Information, General Procedures).

Yes

GO to G2

CHECK the A/C system for leaks.

REFER to: Electronic Leak Detection (412-00 Climate Control System - General Information, General Procedures).

REFER to: Fluorescent Dye Leak Detection (412-00 Climate Control System - General Information, General Procedures).

After leak is repaired, RECHARGE the A/C system. REFER to: Air Conditioning (A/C) System Recovery, Evacuation and Charging (412-00 Climate Control System - General Information, General Procedures).

Source reference 3548

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.