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6E–265 TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS Diagnostic Trouble Code (DTC) P0302 Cylinder Misfire Detected Circuit Description Misfire is monitored as a function of the combustion Conditions for Setting the DTC D None of the following DTCs occur: TP sensor, MAF D The engine speed is between 600 and 6250 RPM. D The system voltage is between 11 and 16 volts. D The ECT indicates an engine temperature between ° C (28 ° F) and 120 ° C (248 ° F). D The throttle angle is steady. Action Taken When the DTC Sets D The PCM will illuminate the malfunction indicator lamp D If the misfire is severe enough to cause possible D The PCM will store conditions which were present Conditions for Clearing the MIL/DTC D The PCM will turn the MIL “OFF” on the third D A history DTC P0302 will clear after 40 consecutive D DTC P0302 can be cleared by using the Tech 2 “Clear Diagnostic Aids Check for the following conditions: D System grounds – Ensure all connections are clean D Injector – Perform the injector coil/balance test to D Faulty spark plug – Check for a cracked insulator, D Damaged or faulty ignition coil – Check for cracks, D Substitute a known good coil – Swap the ignition coils DTC P0302 – Cylinder Misfire Detected
Step Action Value(s) Yes No 1 Was the “On-Board Diagnostic (OBD) System Check” — Go to Step 2 Go to OBD System Check 2 1. Start the engine. Run the engine at idle. Is “Misfire Cur. #2” increasing (indicating a misfire — Go to Step 4 Go to Step 3 3 Monitor “Misfire Hist. #2” while operating the vehicle to Is “Misfire Hist. #2” increasing (indicating a misfire — Go to Step 4 Refer to Diagnostic Aids 4 1. Visually and physically inspect the vacuum hoses for splits, kinks, and improper connections. Also, 2. If a problem is found, repair it as necessary. Did the inspection reveal a problem? — Verify repair Go to Step 5 5 1. Install a spark tester at the spark plug end of the cylinder #2 ignition coil. 2. Crank the engine while observing the spark tester. A crisp, blue spark should be observed. Is adequate spark present? — Go to Step 8 Go to Step 6 |