Thursday, August 19, 2021

2010 Cadillac Truck SRX AWD V6-3.0L Page 1959

2010 Cadillac Truck SRX AWD V6-3.0L Page 1959



* 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.



* The ignition voltage is greater than 6 volts.



* The ECM is not commanding reduced power.



* The DTC runs continuously when the above conditions are met.



Conditions for Setting the DTC



P2122



The ECM detects that the APP sensor 1 voltage is less than 0.46 volt for less than 1 s.



P2123



The ECM detects that the APP sensor 1 voltage is greater than 4.7 volts for less than 1 s.



P2127



The ECM detects that the APP sensor 2 voltage is less than 0.32 volt for less than 1 s.



P2128



The ECM detects that the APP sensor 2 voltage is greater than 2.6 volts for less than 1 s.



P2138



The ECM detects that APP sensor 1 and APP sensor 2 disagree greater than 10 percent for less than 1 s.



OR



The ECM detects that both APP sensor 1 and APP sensor 2 are 5 percent greater than the learned minimum position for less than 1 s.



Action Taken When the DTC Sets



* DTCs P2122, P2123, P2127, P2128, and P2138 are Type A DTCs.



* The ECM commands the TAC system to operate in a Reduced Engine Power mode.



Conditions for Clearing the DTC



DTCs P2122, P2123, P2127, P2128, and P2138 are Type A DTCs.



Diagnostic Aids



* If a shared 5-volt reference circuit is shorted to ground or shorted to a voltage, other 5-volt reference circuits may be affected.



* The scan tool 5 volt reference parameter should display between 4.8-5.2 volts.



* A high resistance condition on the accelerator pedal position circuits could cause a DTC to set.



Reference Information



Schematic Reference



Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics



(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Throttle Actuator Control (TAC) System Description (See: Powertrain Management/Computers and Control Systems/Description and



Operation/Throttle Actuator Control (TAC) System Description)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)

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