Throttle Position Sensor (TPS)

Ensure throttle linkage operates smoothly. Start engine, check that vacuum port "N" has vacuum. See Fig 1 . Using an ohmmeter, check resistance between terminals. See TPS RESISTANCE chart. Disconnect TPS connector. Insert feeler gauge between throttle stop screw and stop lever.

Fig 1: Checking Throttle Position Sensor

TPS RESISTANCE

Clearance

Terminals

Ohms

VTA-E2

200-800

.0138"

IDL-E2

⁽¹⁾ *

.0232"

IDL-E2

Infinity

* ⁽²⁾

VTA-E2

3300-10,000

* ⁽³⁾

VCC-E2

3000-7000

⁽¹⁾	Less than 2300 Ohms.

⁽²⁾	Throttle valve in fully opened position.

⁽³⁾	Throttle valve at any position.

By analyzing various signals, the ECM detects system malfunctions which are related to various operating parameter sensors. The ECM stores failure codes associated with the detected failure until the diagnosis system is cleared. Clear the diagnosis system by removing the "STOP" fuse with ignition switch in the "OFF" position.

The "CHECK ENGINE" warning light on instrument panel informs driver that a malfunction has been detected. The light goes out automatically when malfunction has been cleared.