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.
Acceleration Control
When the accelerator pedal is applied, the two accelerator position sensors measure the pedal movement and provide an output voltage proportional to pedal movement to the engine control module (ECM). Two sensors are used as a safety feature. The accelerator pedal has two return springs to guarantee the accelerator returns to the zero position when the pedal is released. While comparison checks are carried out on the accelerator pedal for rational values, communications within the ECM are monitored for rational values and responses.
The ECM then provides an output, based on the accelerator pedal position, which drives a DC motor which positions the throttle blade at the requested angle. The throttle blade position is monitored by two sensors for rational value.
The acceleration control system has the necessary safety features to monitor the correct operation of all the components. Depending on the failure state, the acceleration control system can be put in appropriate safe state, from restricting the RPM to limp home mode.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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