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.
2003 Ford ZX2 AutomaticFACTORY OEM SERVICE PROCEDURE
Section 501 (Cruise Control System)
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Description And Operation
- Diagnosis And Testing
- Speed Control
- Notes
- Special Tool(s)
- Inspection And Verification
- Speed Control Actuator Diagnostic Trouble Code (DTC) Index
- Symptom Chart
- Connector Circuit Reference
- Pinpoint Test A: No Communication With The Speed Control Actuator
- Pinpoint Test B: The Speed Control Is Inoperative - Unable To Enter Self-Test
- Pinpoint Test C: The Speed Control Is Inoperative- No DTCs
- Pinpoint Test D: The Set Speed Fluctuates
- Pinpoint Test E: The Speed Control Does Not Disengage When The Brakes Are Applied
- Pinpoint Test F: The Speed Control Switch Is Inoperative
- Pinpoint Test G: The Speed Control Indicator Lamp Is Always On
- Pinpoint Test H: DTC C1126 - Command Switch Stuck for 2 Minutes or Longer
- Pinpoint Test I: DTC C1127 - Deactivator Switch Stuck Open (Vehicles With Stability Assist)
- Pinpoint Test J: DTC C1127 - Deactivator Switch Stuck Open
- Pinpoint Test K: DTC C1179 - Excessive Cable Slack in Speed Control Cable, DTC C1109 - Throttle Did Not Return to Idle after Self-Test
- Pinpoint Test L: DTC B1318 - Low Ignition Voltage During Speed Control Operation
- Pinpoint Test M: DTCs U1027, U1041, U1051 and U1059
- Speed Control
- Removal And Installation
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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