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.
Servo Assembly
Servo assembly consists of a vacuum diaphragm that actuates the throttle lever and 2 vacuum control solenoids (vacuum solenoid and vent solenoid). See Fig 1 . Vacuum and vent solenoids, responding to commands from cruise control module, regulate vacuum supply to diaphragm. Engine manifold vacuum (or vacuum pump on vehicles with diesel engine) provides vacuum source for diaphragm.
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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.