2010 Cadillac Truck SRX AWD V6-3.0L Page 1404

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1404



P0306



DTC P0300-P0306 (LF1, LFW)



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 P0300



- Engine Misfire Detected



DTC P0301



- Cylinder 1 Misfire Detected



DTC P0302



- Cylinder 2 Misfire Detected



DTC P0303



- Cylinder 3 Misfire Detected



DTC P0304



- Cylinder 4 Misfire Detected



DTC P0305



- Cylinder 5 Misfire Detected



DTC P0306



- Cylinder 6 Misfire Detected



Circuit/System Description



The engine control module (ECM) uses information from the crankshaft position sensor and the camshaft position sensors in order to determine



when an engine misfire is occurring. By monitoring variations in the crankshaft rotation speed for each cylinder, the ECM is able to detect



individual misfire events. A misfire rate that is high enough can cause 3-way catalytic converter damage. The malfunction indicator lamp (MIL)



will flash ON and OFF when the conditions for catalytic converter damage are present. DTCs P0301 through P0306 correspond to cylinders 1



through 6. If the ECM is able to determine that a specific cylinder is misfiring, the DTC for that cylinder will set, and the corresponding fuel



injector is disabled. The ECM will re-enable the fuel injector after 4 crankshaft revolutions when the misfire is not current. The ECM will re-enable



the fuel injector after 8 crankshaft revolutions when the misfire is not current, if the vehicle is equipped with a manual transmission.



Conditions for Running the DTC



* DTC P0010, P0011, P0013, P0014, P0016, P0017, P0018, P0019, P0020, P0021, P0023, P0024, P0068, P0101, P0102, P0103, P0106,



P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0335, P0336, P0606, P0641, P0651,



P1516, P2101, P2122, P2123, P2127, P2128 or P2176 is not set.



* The engine speed is between 450-6,600 RPM.



* The evaporative emissions (EVAP) leak detection is not active.



* The delivered torque signal is greater than 5 % at idle.



* The delivered torque signal is between 6-29 % with the transmission in drive.



* The engine coolant temperature (ECT) is between -7 and +127掳C (+19 and +261掳F).



* The ECM is not receiving a rough road signal.



* The fuel level is greater than 11 %.



* The antilock brake system (ABS) and the traction control system (TCS) are not active or detecting rough road.



* Torque Converter Clutch (TCC) is not applied/active.



* The ECM is not in fuel cut-off or decel fuel cut-off mode.



* DTCs P0300 through P0306 run continuously when the above conditions exist for greater than 1,000 engine revolutions. 200 revolutions



after the first failure.



Conditions for Setting the DTC

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