Sunday, November 1, 2020

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1840

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1840



DTC P2123



- Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage



DTC P2127



- Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage



DTC P2128



- Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage



DTC P2138



- Accelerator Pedal Position (APP) Sensor 1-2 Correlation



Diagnostic Fault Information



Typical Scan Tool Data



Circuit/System Description



The accelerator pedal assembly contains 2 accelerator pedal position (APP) sensors. The APP sensors are mounted to the accelerator pedal



assembly and are not serviceable. The APP sensors provide a signal voltage that changes relative to pedal position. The engine control module



(ECM) supplies each APP sensor with a 5-volt reference circuit, a low reference circuit, and a signal circuit.



Both the APP sensors 1 and 2 signal percentages increase as the pedal is depressed, from approximately 0 percent at rest to above 95 percent when



fully depressed.



Conditions for Running the DTC



P2122, P2123, P2127, or P2128



* DTC P06A3 or P0697 are not set.



* The ignition is ON or the engine is operating.



* The ignition voltage is greater than 6 volts.



* The ECM is not commanding reduced power.



* The DTCs run continuously when the above conditions are met.



P2138



* DTCs P06A3, P0697, P2122, P2123, P2127, or P2128 are not set.



* The ignition is ON or the engine is operating.