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
โข The PCM performs this DTC diagnostic continuously.
โข The ignition switch in the ON position.
Conditions for Setting the DTC
โข The reference voltage on the APP 3 sensor is less than 4.8 volts.
โข All of the diagnostic set conditions met for 2 seconds.
Action Taken When the DTC Sets
โข The PCM will turn ON the Service Throttle Soon lamp and limit power.
โข Multiple DTCs will be present.
Conditions for Clearing the MIL/DTC
โข A History DTC clears after forty consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures
โข The use of a scan tool.
Diagnostic Aids
An intermittent may be caused by the following:
โข Poor connections
โข Rubbed through wire insulation
โข Broken wire inside the insulation
All 5 volt reference circuits must be checked for proper reference voltage. Voltmeter accuracy is important.
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
2. This step will check all 5 volt reference circuits.
