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 MANUALSFORD2007E 450 V8-5.4LREPAIR AND DIAGNOSISCRUISE CONTROLTESTING AND INSPECTIONPINPOINT TESTSTEST A: THE SPEED CONTROL IS INOPERATIVE
2007 Ford E 450 V8-5.4L
Test A: The Speed Control Is Inoperative
2007 Ford E 450 V8-5.4LSECTION Test A: The Speed Control Is Inoperative
PINPOINT TEST A: THE SPEED CONTROL IS INOPERATIVE
Normal Operation
The powertrain control module (PCM) sends a signal through circuit 151 (LB/BK) to the speed control switches, which passes through the clockspring. The return signal is sent to the PCM through circuit 848 (DG/OG) and the clockspring. When the brake pedal is applied the PCM deactivates the speed control if engaged.
Possible Causes
- Speed control switches
- Digital transmission range (TR) sensor
- Brake warning indicator system
- Output shaft sensor (OSS) signal
- PCM
A1-A2:
A2-A6:
A6-A7:
Normal Operation
The powertrain control module (PCM) sends a signal through circuit 151 (LB/BK) to the speed control switches, which passes through the clockspring. The return signal is sent to the PCM through circuit 848 (DG/OG) and the clockspring. When the brake pedal is applied the PCM deactivates the speed control if engaged.
Possible Causes
- Speed control switches
- Digital transmission range (TR) sensor
- Brake warning indicator system
- Output shaft sensor (OSS) signal
- PCM
RENDER: 1.0x
NO RELATED
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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.