Tuesday, January 7, 2020

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1827

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1827



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* 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) Sensors 1-2 Not Plausible



Diagnostic Fault Information



Typical Scan Tool Data



Circuit/System Description



The accelerator pedal assembly contains two accelerator pedal position (APP) sensors. The APP sensors are mounted in the pedal assembly and are



not serviceable. The APP sensors provide a signal voltage that changes relative to the position of the accelerator pedal. The engine control module



(ECM) supplies a separate 5-volt reference and low reference circuit for each of the APP sensors.



The APP sensor 1 signal voltage increases as the pedal is depressed, from approximately 1.0 volt at rest to approximately 4 volts when fully



depressed. The APP sensor 2 signal voltage increases as the pedal is depressed, from approximately 0.5 volt at rest to approximately 2 volts with



the accelerator pedal fully depressed.



Conditions for Running the DTCs

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