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 MANUALSAUDI1996A4 BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSENGINE SWITCHESCLOSED THROTTLE POSITION (CTP) SWITCH
1996 Audi A4 Base, Standard
Closed Throttle Position (CTP) Switch
1996 Audi A4 Base, StandardSECTION Closed Throttle Position (CTP) Switch
NOTE:
Closed Throttle Position (CTP) switch is located within Throttle Position (TP) sensor. By adjusting CTP switch, TP sensor is automatically adjusted.
- Remove noise dampener and disconnect harness connector from throttle body assembly. Using DVOM, measure resistance between TP sensor terminals No. 4 and 6. See Fig 1 . Resistance must be zero ohms. Open throttle slightly. Resistance must be infinite. If specified resistance is not obtained or is obtained only after opening throttle further, adjust CTP switch.
- To adjust CTP switch, remove throttle body assembly. Loosen both TP sensor screws. Turn TP sensor counterclockwise until stop is reached. Ensure linkage is not moved. Tighten TP sensor screws in this position. Install throttle body and adjust accelerator pedal cable. See ADJUSTMENTS article.
- Check CTP switch again. If specified resistance value is still not obtained, replace TP sensor.
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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.