Circuit Description
The accelerator pedal position (APP) module provides a voltage signal
that changes relative to accelerator pedal position. There are three sensors
located within the APP module that are scaled differently.
Conditions for Running the DTC
The ignition switch is in the on position.
Conditions for Setting the DTC
| • | The PCM performs this DTC diagnostic continuously. |
| • | The 5 reference voltage on the APP 1 sensor is less than
4.8 volts. |
| • | All of the diagnostic set conditions met for 2 seconds. |
Action Taken When the DTC Sets
| • | The PCM will turn ON the service throttle soon lamp and limit
power. |
| • | The PCM records the operating conditions at the time the diagnostic
fails. This information will store in the Failure Records. |
Conditions for Clearing the MIL/DTC
| • | A History DTC will after forty consecutive warm-up cycles,
if this or any other emission related diagnostic does not report any fialure. |
Diagnostic Aids
Important: Remove any debris from the PCM module connector surfaces before servicing
the PCM module. Inspect the PCM module connector gaskets when diagnosing/replacing
the module. Ensure that the gaskets are installed correctly.
The most likely cause of this DTC is loose connectors or terminals.
All 5 volt reference circuits must be checked for proper reference
voltage. Voltmeter accuracy is important.
