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. |
| • | The PCM performs this DTC diagnostic continuously. |
Coditions for Setting the DTC
| • | The reference voltage on the APP 3 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. |
| • | Multiple DTCs will be present. |
Conditions for Clearing the MIL/DTC
| • | A History DTC clears after forty consecutive warm-up cycles, if
this or any other emission related diagnostic does not report any failures. |
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 gaskets
prevent contaminate intrusion into the PCM module.
An intermittent may be caused by the following:
| • | Rubbed through wire insulation |
| • | Broken wire inside the insulation |
All 5 volt reference circuits must be checked for proper reference
voltage. Voltmeter accuracy is important.
