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 854 (CRUISE CONTROL SYSTEM (F-250-F550))DIAGNOSTIC TESTSSPEED CONTROLINSPECTION AND VERIFICATION
2005 Ford Taurus SEL, 4D Sedan
Inspection and Verification
2005 Ford Taurus SEL, 4D SedanSECTION Inspection and Verification
WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- Visually inspect the following for obvious signs of mechanical or electrical damage. VISUAL INSPECTION CHART
Mechanical Electrical - Throttle body
- Battery junction box (BJB) fuse:
- 12 (2A)
- Central junction box (CJB) fuse:
- 34 (10A)
- 45 (10A) Diesel
- Circuitry
- Speed control switch(es)
- Clutch pedal position (CPP) switch
- Speed control deactivator switch
- Stoplamp switch
- Powertrain control module (PCM)
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- Verify the speedometer operates correctly without speed control by test driving the vehicle. If the speedometer does not operate correctly, refer to INSTRUMENT CLUSTER article.
- Verify the brake warning indicator is operating correctly. If the brake warning indicator is not operating correctly, refer to INSTRUMENT CLUSTER article.
- If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
- If the scan tool does not communicate with the VCM:
- Check the connection to the vehicle.
- Refer to MODULE COMMUNICATIONS NETWORK article to diagnose no communication with the scan tool.
- If the scan tool does not communicate with the vehicle:
- Verify the ignition key is in the ON position.
- Verify the scan tool operation with a known good vehicle.
- Refer to MODULE COMMUNICATIONS NETWORK article to diagnose no response from the PCM.
- Carry out the network test:
- If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK article.
- If the network test passes, retrieve and record the continuous memory diagnostic trouble codes (DTCs).
- Clear the continuous DTCs and carry out the self-test diagnostics for the PCM.
- If the DTCs retrieved are related to the concern, go to the Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
- If no DTCs related to the concern are retrieved, go to Symptom Chart .POWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX
DTCs Description Action P0500 Vehicle Speed Error REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - TORQSHIFT article. P0565 Cruise Control ON Signal Go to Pinpoint Test D . P0566 Cruise Control OFF Signal Go to Pinpoint Test D . P0567 Cruise Control RESUME Signal Go to Pinpoint Test D . P0568 Cruise Control SET Signal Go to Pinpoint Test D . P0569 Cruise Control COAST Signal Go to Pinpoint Test D . P0578 Cruise Control Multifunction Input A Circuit Stuck Go to Pinpoint Test D . P0579 Cruise Control Multifunction Input A Circuit Range/Performance Go to Pinpoint Test D . P0581 Cruise Control Multifunction Circuit High Go to Pinpoint Test D . P0833 Clutch Pedal Switch B Circuit Go to Pinpoint Test G (Gasoline) or Go to Pinpoint Test H (Diesel). P1703 Brake Switch Out of Self-Test Range Go to Pinpoint Test C . P1572 Brake Pedal Switch Circuit Go to Pinpoint Test C . All other DTCs - REFER to the INTRODUCTION - GASOLINE ENGINES or INTRODUCTION -- DIESEL ENGINES article.
NOTE:
The vehicle communication module (VCM) LED prove-out confirms voltage and ground from the DLC are provided to the VCM.
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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.