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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSFORD1997ESCORT L4-122 2.0L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORDESCRIPTION AND OPERATION
1997 Ford Escort L4-122 2.0L SOHC
Throttle Position Sensor: Description and Operation
1997 Ford Escort L4-122 2.0L SOHCSECTION Description and Operation
PURPOSE
The Throttle Position (TP) sensor responds to the accelerator pedal movement. The TP sensor transforms the throttle plate opening angle into output voltage, and sends the voltage signal to the Powertrain Control Module (PCM)
OPERATION
The TP sensor monitors throttle angle. The PCM determines four operating modes from the throttle angle signal:
- Closed throttle (idle or deceleration).
- Part throttle (cruise or moderate acceleration).
- Wide open throttle (maximum acceleration, de-choke on crank).
- Throttle angle rate.
The PCM uses the sensor input and reacts to control spark advance, Exhaust Gas Recirculation (EGR) flow, air/fuel ratio and A/C clutch cutout.
CONSTRUCTION
The TP sensor is rotary potentiometer that has a pivot arm that moves along a curved resistor. The sensor housing has a three blade gold plated electrical connector.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.