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F–126 ON-BOARD DIAGNOSTIC End Of Sie DTC P0327 A6E397001085W03 10 INSPECT SEALING OF ENGINE COOLANT Warning hot is dangerous, Scalding coolant and • When removing radiator cap, wrap thick cloth around and turn it slowly. • Remove radiator cap. • Implement procedure to bleed air from engine coolant, then run engine at idle. • Is there any small bubble which makes engine coolant white at filling opening? Note • Large bubbles are normal since they are remaining air coming out from engine Yes Air gets in from poor sealing on head gasket or other areas between combustion chamber and engine coolant No Go to next step. 11 INSPECT ENGINE COMPRESSION • Inspect engine compression. • Is engine compression okay? Yes Go to next step. No Overhaul the engine, then go to next step. 12 INSPECT FUEL INJECTOR OPERATION • Remove fuel injector from suspected cylinder. • Swap injector with injector on other cylinder. • Start engine and run it at idle. • Is misfire DTC for cylinder which has a suspected fuel injector? Yes Replace injector, then go to step 13. No Go to next step. 13 VERIFY TROUBLESHOOTING OF MISFIRE DTC • Make sure to reconnect all disconnected connectors. • Start engine. • Clear DTC from PCM memory using WDS or equivalent. • Run PCM adaptive memory procedure drive • Is same PENDING CODE or stored code the same as DTC present? Yes Replace PCM, then go to next step. (See No Go to next step. 14 VERIFY AFTER REPAIR PROCEDURE • Perform “After Repair Procedure”. • Is there any DTC present? Yes Go to applicable DTC troubleshooting. (See .) No Troubleshooting completed. STEP INSPECTION ACTION DTC P0327 Knock sensor circuit low input DETECTION CONDITION • PCM monitors input signal from knock sensor when engine is running. If input voltage at PCM terminals between 2P and 2S is below 0.9 V, PCM determines that knock sensor circuit has malfunction. Diagnostic support note • This is a continuous monitor (CCM). • MIL illuminates if PCM detects the above malfunction condition during first drive cycle. • PENDING CODE is available if PCM detects the above malfunction condition. • FREEZE FRAME DATA is available. • DTC is stored in the PCM memory. POSSIBLE CAUSE • Knock sensor malfunction • Connector or terminal malfunction • Open or short to ground circuit between knock sensor connector terminal A and PCM terminal 2S • Open or short to ground circuit between knock sensor connector terminal B and PCM terminal 2P • Short knock sensor two wires |