DTC 41

Code Chart 41:

Throttle Position Sensor Circuit:

CIRCUIT DESCRIPTION:

The Throttle Postion Sensor (TPS) provides a voltage signal that changes relative to the throttle valve. Signal voltage will vary from less than .60 volt at idle to about 4.5 volts at Wide Open Throttle (WOT). The idle switch provides the ECM with information used to decide "CLOSED LOOP" operation and indicates the "OFF-IDLE" condition to the ECM. This switch is normally closed at idle and opens above 1800 rpm, which is then the "OFF-IDLE" condition.

TEST DESCRIPTION: Numbers below refer to circled numbers on the diagnostic chart.

1. Voltage should be below 0.6 volt at idle.

2. Voltage should increase above 4.5 volts at WOT.

DIAGNOSTIC AIDS:

An intermittent may be caused by a poor connection, rubbed through wire insulation, or a wire broken inside the insulation. Inspect ECM harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection and damaged harness.