P2122-ACCELERATOR PEDAL POSITION SENSOR 1 CIRCUIT LOW
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
The Accelerator Pedal Position (APP) Sensor contains two independent three wire sensors. Each sensor provides independent pedal position signals to the Powertrain Control Module (PCM). The raw voltage signal from APP Sensor 1 is twice the raw voltage signal from APP Sensor 2. Although the raw voltage signals differ, the scan tool converts and displays these voltages as matching percentages of pedal travel.
When Monitored:
With the ignition on.
Set Condition:
The APP Sensor 1 Signal circuit is below 0.2 volt for 0.31 second.
3.
CHECK FOR THE (K23) APP SENSOR 1 SIGNAL CIRCUIT FOR A SHORT TO THE SENSOR GROUND CIRCUITS
1.
Measure the resistance between the (K23) APP Sensor 1 Signal circuit and the (K167) APP Sensor 1 Sensor Ground circuit at the APP Sensor harness connector.
2.
Measure the resistance between the (K23) APP Sensor 1 Signal circuit and the (K400) APP Sensor 2 Sensor Ground circuit at the APP Sensor harness connector.
Is the resistance above 10k Ohms for both measurements?
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM).
2.
Look for any chafed, pierced, pinched, or partially broken wires.
3.
Look for broken, bent, pushed out or corroded terminals.
4.
Perform any Technical Service Bulletins that may apply.
