DTC 41

Code Chart 41:

Throttle Position Switch Circuit:

CIRCUIT DESCRIPTION:

The ECM supplies B+ to a throttle switch on the throttle body. When engine is idling the ECM senses a low voltage signal at the idle signal input, slight throttle the ECM will sense a high voltage signal. At wide open throttle the signal voltage, at the WOT signal input is low. Code 41 will set if the ECM sees a low signal all the time or a high voltage.

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

1. The ECM supplies battery voltage to the throttle switch. Poor connection or a grounded circuit will indicate a faulty signal.

2. This will check for a misadjusted throttle switch.

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. Testing and Inspection