Tuesday, April 13, 2021

2010 Cadillac CTS Sedan AWD V6-3.6L Page 965

2010 Cadillac CTS Sedan AWD V6-3.6L Page 965



normal, replace the K20 ECM.



4. Connect a 3 A fused jumper wire between the heater control circuit terminal E and ground. Observe the appropriate scan tool HO2S Heater



Control Circuit Low Voltage Test Status parameter. The parameter should transition from OK to Malfunction.



瀚慖f not the specified value, test the heater control circuit terminal E for an open/high resistance. If the circuit tests normal, replace the K20



ECM.



Note:



* Less than 10 ohm of additional resistance on the ignition voltage circuit, or control circuit may set a DTC. If there is resistance on a



circuit, the driver will remain ON and the scan tool HO2S High Voltage Test Status parameter will display OK.



* Performing this test may set additional DTCs.



5. Ignition OFF, connect a 10 A fused jumper wire between the control circuit terminal E and the ignition voltage circuit terminal D.



6. Engine idling, observe the appropriate HO2S Control Circuit High Voltage Test Status parameter. The parameter should transition from Not



Run to Malfunction.



瀚慖f not the specified value, test the control circuit and the ignition voltage circuit for high resistance. If the circuits test normal, replace the



K20 ECM.



7. 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 (LLT) (See: Powertrain Management/Computers and



Control Systems/Oxygen Sensor/Service and Repair)



* 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 (LLT) (See: Powertrain Management/Computers and



Control Systems/Oxygen Sensor/Service and Repair)



* 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 (LLT) (See: Powertrain Management/Computers and



Control Systems/Oxygen Sensor/Service and Repair)



* 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 (LLT) (See: Powertrain Management/Computers and



Control Systems/Oxygen Sensor/Service and Repair)



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



P062B



DTC P062B (w/LLT)



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 Descriptor



DTC P062B



- Control Module Fuel Injector Control Performance



Circuit/System Description



This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM).



Conditions for Running the DTC



* The engine is running or cranking.



* The ignition voltage is between 8-18 V.