P0225

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION
The Accelerator Pedal Position (APP) module provides a voltage signal that changes relative to the accelerator pedal position. There are 3 sensors which are located within the APP module that are scaled differently.

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

CONDITIONS FOR SETTING THE DTC
^ The reference voltage on the APP 3 is less than 4.8 volts.
^ The condition was met for 2 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The service throttle soon lamp will not illuminate when one APP DTC sets. The PCM will only illuminate the service throttle soon lamp when multiple APP DTCs set.
^ The Powertrain Control Module (PCM) records the operating conditions at the time the diagnostic fails. This information is stored in the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A History DTC clears after 40 consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures.
^ Use a scan tool in order to clear the DTCs.

DIAGNOSTIC AIDS
An intermittent may be caused by:
^ Faulty connections
^ Rubbed-through wire insulation
^ A broken wire inside the insulation

All of the 5-volt reference circuits must be checked for proper reference voltage. Voltmeter accuracy is important.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
2. This step will check all 5-volt reference circuits.