Symptom Chart: Climate Control - Dual Automatic Temperature Control (DATC)
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. for information about these practices.
| Condition | Possible Sources | Actions |
|---|---|---|
| No communication with the HVAC control module | Fuse(s) Wiring, terminals or connectors HVAC control module | REFER to: COMMUNICATIONS NETWORK . |
| Unable to duplicate the customer concern | Refer to Diagnostic Routine | GO to Pinpoint Test D |
| HVAC functions are inoperative/do not operate correctly from touchscreen only | Communication network FDIM APIM | REFER to: INFORMATION AND ENTERTAINMENT SYSTEM . |
| Reduced outlet airflow | Refer to Diagnostic Routine | If the A/C compressor clutch is always ON with the mode selection switch turned off and PCM DTC P1464 is not present, GO to Pinpoint Test I If the AC compressor clutch is always ON with the mode selection switch turned off and the PCM DTC P1464 is present, GO to Pinpoint Test J If the A/C compressor clutch turns on and off normally with the mode selection switch, GO to Pinpoint Test N |
| The air inlet door is inoperative | Refer to Diagnostic Routine | GO to Pinpoint Test E |
| Incorrect/erratic direction of airflow from outlets | Refer to Diagnostic Routine | GO to Pinpoint Test F |
| Insufficient, erratic or no heat | Refer to Diagnostic Routine | GO to Pinpoint Test G |
| The A/C is inoperative | Refer to Diagnostic Routine | GO to Pinpoint Test H |
| The A/C is always on | Refer to Diagnostic Routine | GO to Pinpoint Test I |
| The A/C is always on - A/C mode always commanded ON | Refer to Diagnostic Routine | GO to Pinpoint Test J |
| Temperature control is inoperative/does not operate correctly - LH | Refer to Diagnostic Routine | GO to Pinpoint Test K |
| Temperature control is inoperative/does not operate correctly - RH | Refer to Diagnostic Routine | GO to Pinpoint Test L |
| The blower motor is inoperative | Refer to Diagnostic Routine | GO to Pinpoint Test M |
| The blower motor does not operate correctly | Refer to Diagnostic Routine | GO to Pinpoint Test N |
| The temperature setpoint does not repeat after turning the ignition switch OFF | HVAC control module | INSTALL a new HVAC control module. REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module . |
| The temperature display will not switch between Celsius and Fahrenheit | HVAC control module IPC | If the IPC does not switch between English and Metric, REFER to: INSTRUMENTATION, MESSAGE CENTER AND WARNING CHIMES . If only the HVAC control module does not switch between English and Metric, INSTALL a new HVAC control module. REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module . |
| A/C pressure relief valve discharging | High system pressure A/C pressure relief valve | CHECK the high side system pressure. If the pressure is below the A/C pressure relief valve open pressure, REPLACE the A/C compressor. For 2.0L Duratec-HE REFER to: Air Conditioning (A/C) Compressor - 2.0L Duratec-HE . For 2.0L Ecoboost REFER to: Air Conditioning (A/C) Compressor - 2.0L EcoBoost . If the system pressure is above the A/C pressure relief valve open pressure, REPAIR the system for a restriction. |
SYMPTOM CHART
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. for information about these practices.
| Condition | Possible Sources | Actions |
|---|---|---|
| Noisy A/C compressor | A/C compressor pulley bearing worn | INSPECT the A/C compressor pulley bearing for roughness. If bearing roughness is found, INSTALL a new A/C compressor. For 2.0L Duratec-HE REFER to: Air Conditioning (A/C) Compressor - 2.0L Duratec-HE . For 2.0L Ecoboost REFER to: Air Conditioning (A/C) Compressor - 2.0L EcoBoost . |
| A/C compressor bearing worn | INSPECT the A/C compressor pulley bearing for roughness. If bearing roughness is found, INSTALL a new A/C compressor. For 2.0L Duratec-HE REFER to: Air Conditioning (A/C) Compressor - 2.0L Duratec-HE . For 2.0L Ecoboost REFER to: Air Conditioning (A/C) Compressor - 2.0L EcoBoost . |
SYMPTOM CHART
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. for information about these practices.
Refer to MANUAL CLIMATE CONTROL SYSTEM for schematic and connector information.
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P0532:00 | A/C Refrigerant Pressure Sensor A Circuit Low: No Sub Type Information | The A/C pressure transducer inputs a feedback voltage to the PCM. This DTC sets if the feedback voltage is lower than expected. |
| P0533:00 | A/C Refrigerant Pressure Sensor A Circuit High: No Sub Type Information | The A/C pressure transducer inputs a feedback voltage to the PCM. This DTC sets if the feedback voltage is greater than expected. |
DTC FAULT TRIGGER CONDITIONS
- Wiring, terminals or connectors
- A/C Pressure Transducer
- PCM
Note. Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
- A1 CHECK A/C (AIR CONDITIONING) PRESSURE TRANSDUCER CIRCUITS FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect PCM C175B. Disconnect A/C Pressure Transducer C1260. Ignition ON. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1260-1 - C1260-2 - C1260-3 - Is any voltage present? Yes: REPAIR the circuit. No: GO to A2
- A2 CHECK THE A/C (AIR CONDITIONING) PRESSURE TRANSDUCER CIRCUITS FOR A SHORT TO GROUND Ignition OFF. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1260-1 ohms - C1260-2 ohms - C1260-3 ohms - Is the resistance greater than 10, 000 ohms? Yes: GO to A3 No: REPAIR the circuit in question.
- A3 CHECK A/C (AIR CONDITIONING) PRESSURE TRANSDUCER CIRCUITS FOR AN OPEN Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1260-1 ohms C175B-37 C1260-2 ohms C175B-31 C1260-3 ohms C175B-51 Is the resistance less than 3 ohms? Yes: GO to A4 No: REPAIR the circuit.
- A4 CHECK A/C (AIR CONDITIONING) PRESSURE TRANSDUCER CIRCUITS FOR A SHORT TOGETHER Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1260-1 ohms C1260-2 C1260-2 ohms C1260-3 C1260-3 ohms C1260-1 Are the resistances greater than 10, 000 ohms? Yes: GO to A5 No: REPAIR the circuits in question.
- A5 CHECK THE PCM (POWERTRAIN CONTROL MODULE) OUTPUT VOLTAGE Ignition OFF. Connect PCM C175B. Ignition ON. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1260-3 - Is the voltage between 4.7 and 5.1 volts? Yes: GO to A6 No: GO to A8
- A6 CHECK THE A/C (AIR CONDITIONING) PRESSURE TRANSDUCER HIGH Using a scan tool, view PCM PIDs. Monitor the ACP_PRESS PID. Connect a fused jumper wire: Click to display connectors Positive Lead Measurement / Action Negative Lead C1260-3 C1260-2 Does the PID voltage read greater than 4.7 volts? Yes: INSTALL a new A/C pressure transducer, REFER to: «Air Conditioning (A/C) Pressure Transducer»(/ford/focus-st/iii-2012-2015/remont/manual-hvac-system/#climate-control-system-general-information-except-electric) . No: GO to A7
- A7 CHECK THE A/C (AIR CONDITIONING) PRESSURE TRANSDUCER LOW Disconnect the fused jumper wire. Does the ACP_PRESS PID voltage read less than 0.3 volts? Yes: INSTALL a new A/C pressure transducer, REFER to: «Air Conditioning (A/C) Pressure Transducer»(/ford/focus-st/iii-2012-2015/remont/manual-hvac-system/#climate-control-system-general-information-except-electric) . No: GO to A8
- A8 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION Ignition OFF. Disconnect and inspect all the PCM 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 PCM 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 PCM. For 2.0L Duratec-HE REFER to: «POWERTRAIN CONTROL MODULE (PCM)»(/ford/focus-st/iii-2012-2015/remont/removal-installation/#electronic-engine-controls-20l-duratec-he__powertrain-control-module-pcm) . For 2.0L Ecoboost REFER to: «POWERTRAIN CONTROL MODULE (PCM)»(/ford/focus-st/iii-2012-2015/remont/removal-installation/#electronic-engine-controls-20l-ecoboost__powertrain-control-module-pcm) . 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.
Refer to MANUAL CLIMATE CONTROL SYSTEM for schematic and connector information.
Voltage is provided to the AC clutch relay coil. When AC is requested and AC line pressures allow, a ground is provided to the AC clutch relay coil from the PCM, energizing the AC clutch relay.
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P0645:00 | A/C Clutch Relay Control Circuit: No Sub Type Information | The DTC sets when the PCM grounds the relay circuit and more voltage than expected is detected on the relay circuit. The DTC also sets when the relay circuit is off and no voltage is detected on the relay circuit. The PCM expects to detect voltage coming through the relay coil to the relay circuit when it is not grounding it. |
DTC FAULT TRIGGER CONDITIONS
- Wiring, terminals or connectors
- A/C clutch relay
- PCM
- Inspect BJB fuse 23 (5A).
Note. Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
Scheme 24
- B1 CHECK THE VOLTAGE TO THE A/C (AIR CONDITIONING) CLUTCH RELAY COIL VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Ignition OFF. Disconnect A/C Clutch Relay. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead Pin 1 - Is the voltage greater than 11 volts? Yes: GO to B2 No: REPAIR the circuit.
- B2 SUBSTITUTE A KNOWN GOOD RELAY FOR THE A/C (AIR CONDITIONING) CLUTCH RELAY Substitute a known good relay for the A/C clutch relay. Using a scan tool, perform PCM self-test. Is DTC P0645:00 still present? Yes: GO to B3 No: INSTALL a new A/C clutch relay.
- B3 CHECK THE A/C (AIR CONDITIONING) CLUTCH RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect PCM C175B. Ignition ON. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead Pin 2 - Is any voltage present? Yes: REPAIR the circuit. No: GO to B4
- B4 CHECK THE A/C (AIR CONDITIONING) CLUTCH RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND Ignition OFF. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead pin 2 ohms - Is the resistance greater than 10, 000 ohms? Yes: GO to B5 No: REPAIR the circuit.
- B5 CHECK THE A/C (AIR CONDITIONING) CLUTCH RELAY CONTROL CIRCUIT FOR AN OPEN Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead Pin 2 ohms C175B-10 Is the resistance less than 3 ohms? Yes: GO to B6 No: REPAIR the circuit.
- B6 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION Ignition OFF. Disconnect and inspect all the PCM 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 PCM 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 PCM. For 2.0L Duratec-HE REFER to: «POWERTRAIN CONTROL MODULE (PCM)»(/ford/focus-st/iii-2012-2015/remont/removal-installation/#electronic-engine-controls-20l-duratec-he__powertrain-control-module-pcm) . For 2.0L Ecoboost REFER to: «POWERTRAIN CONTROL MODULE (PCM)»(/ford/focus-st/iii-2012-2015/remont/removal-installation/#electronic-engine-controls-20l-ecoboost__powertrain-control-module-pcm) . 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.
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0140:00 | Lost Communication With Body Control Module: No Sub-Type Information | This Continuous Memory Diagnostic Trouble Code (CMDTC) sets in the HVAC control module if data messages received from the BCM over the CAN are missing for 5 seconds or more. |
DTC FAULT TRIGGER CONDITIONS
- Fuse(s)
- Wiring, terminals or connectors
- 12V battery voltage
- BCM
- HVAC