Saturday, June 11, 2022

2010 Cadillac Truck SRX FWD V6-3.0L Page 1197

2010 Cadillac Truck SRX FWD V6-3.0L Page 1197



瀚慖f greater than the specified value, test the low signal circuit for an open/high resistance or for a short to voltage. If the circuit tests



normal, replace the K20 ECM.



6. Verify none of the following conditions exist:



* Water intrusion in the HO2S harness connector



* Low or high fuel system pressure-Refer to Fuel System Diagnosis (LF1 China) (See: Powertrain Management/Fuel Delivery and Air



Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (China))Fuel System Diagnosis (LF1 Except China) (See:



Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (Except China))Fuel



System Diagnosis (LAU China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel



System Diagnosis (China))Fuel System Diagnosis (LAU Except China) (See: Powertrain Management/Fuel Delivery and Air



Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (Except China)).



* Fuel that is contaminated-Refer to Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool) (See: Powertrain Management/Fuel Delivery



and Air Induction/Fuel/Testing and Inspection/Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool))Alcohol/Contaminants-in-Fuel



Diagnosis (Without Special Tool) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component



Tests and General Diagnostics/Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)).



* Fuel saturation of the evaporative emission (EVAP) canister



* Exhaust leaks near the HO2S



* Engine vacuum leaks



瀚慖f any of the above conditions exist, repair as necessary. If all circuits test normal, test or replace the appropriate B52 HO2S.



Repair Instructions



Caution: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution (See: Powertrain Management/Computers and Control



Systems/Oxygen Sensor/Service Precautions/Heated Oxygen Sensor Resistance Learn Reset Caution).



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen



Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 1 Sensor 1)



* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen



Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 1 Sensor 2)



* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen



Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 2 Sensor 1)



* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen



Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Bank 2 Sensor 2)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming



P0141



DTC P0030, P0036, P0050, P0053, P0054, P0056, P0059, P0060, P0135, P0141, P0155, or P0161 (LF1)



Diagnostic Instructions



* 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 P0030



- HO2S Heater Control Circuit Bank 1 Sensor 1



DTC P0036



- HO2S Heater Control Circuit Bank 1 Sensor 2



DTC P0050



- HO2S Heater Control Circuit Bank 2 Sensor 1



DTC P0053



- HO2S Heater Resistance Bank 1 Sensor 1



DTC P0054



- HO2S Heater Resistance Bank 1 Sensor 2

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