Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2005TAURUS SEL, 4D SEDANREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1518 (CLIMATE CONTROL SYSTEM - GENERAL INFORMATION & DIAGNOSTICS (HYBRID))DIAGNOSIS AND TESTINGCLIMATE CONTROL SYSTEMHVAC MODULE AND A/C COMPRESSOR SELF-TEST
2005 Ford Taurus SEL, 4D Sedan
HVAC Module and A/C Compressor Self-Test
2005 Ford Taurus SEL, 4D SedanSECTION HVAC Module and A/C Compressor Self-Test
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
During the self-test, the HVAC module will do the following:
- command airflow to PANEL vents
- command temperature blend door actuator to full cold
- set blower speed to level 4 and the 4th level will be displayed on the display
- illuminate the POWER, A/C and RECIRC button indicators
- flash the DEFROST, AUTO and rear window defrost button indicators
- command the A/C compressor to between 1,900 and 2,000 rpm
- Start the engine.
- Observe the Electric A/C Compressor Speed (ACCM_ECS) Air Conditioning Compressor Module (ACCM) PID.
- At the same time, press and release the POWER and DEFROST buttons then, within 2 seconds, press the RECIRC button.
- Observe the HVAC module actions and A/C compressor speed.
- To exit the self-test, press any climate control button or turn the ignition OFF.
- If the airflow is incorrect, refer to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION & DIAGNOSTICS -- FUSION, MILAN & MKZ (EXCEPT HYBRID) article.
- If the panel outlet temperature is incorrect, refer to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION & DIAGNOSTICS -- FUSION, MILAN & MKZ (EXCEPT HYBRID) article.
- If the blower is inoperative, GO to PINPOINT TEST K .
- If the blower speed is incorrect, GO to PINPOINT TEST L .
- If one or more indicators do not illuminate but the HVAC and A/C compressor operate correctly, INSTALL a new Front Controls Interface Module (FCIM). Refer to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article.
- If the ACCM_ECS PID reads 0 RPM, GO to PINPOINT TEST I .
- If the ACCM_ECS PID reads between 1 and 1,899 rpm or greater than 2,000 rpm, INSTALL a new electric A/C compressor. REFER to CLIMATE CONTROL -- FUSION, MILAN & MKZ . TEST the system for normal operation.
- If all modes in the self-test are achieved, GO to PINPOINT TEST E .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.