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• When Monitored: • Set Condition: Possible Causes (A142) AND (F142) ASD RELAY OUTPUT CIRCUIT (K58) INJECTOR CONTROL NO.6 CIRCUIT (K10) COIL CONTROL NO.6 CIRCUIT IGNITION WIRE SPARK PLUG IGNITION COIL FUEL PUMP INLET STRAINER PLUGGED RESTRICTED FUEL SUPPLY LINE FUEL PUMP MODULE FUEL PRESSURE LEAK DOWN FUEL INJECTOR ENGINE MECHANICAL PROBLEM PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. CYLINDER MIS-FIRE CONDITION ACTIVE Engine running. Observe the WHICH CYLINDER IS MISFIRING screen for at least one minute with a scan tool. Is there a misfire present at this time? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 2. VISUAL INSPECTION NOTE: Anything that affects the speed of the crankshaft can cause a misfire DTC. NOTE: When a Misfire is detected for a particular cylinder, the PCM will shut down that cylinders Injector - Worn serpentine belt - Binding Engine-Driven accessories: A/C Compressor, P/S Pump, Water pump. - Misalignment Water pump, P/S Pump and A/C Compressor pulleys - Corroded PCM power and ground circuits. - Improper CKP, CMP, MAP, and TP Sensor mounting - Poor connector/terminal to component connection. i.e., CKP sensor, Fuel Injector, Ign coil, etc. - Vacuum leaks - Restricted Air Induction system or Exhaust system. 9 - 278 ENGINE ELECTRICAL DIAGNOSTICS KJ |