Tuesday, June 21, 2022

2010 Cadillac Truck SRX FWD V6-3.0L Page 1968

2010 Cadillac Truck SRX FWD V6-3.0L Page 1968



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC P2122



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



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

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