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Home >> Mazda >> 2007 >> 6 Mazdaspeed >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System L3 With TC] >> DTC P0328 >> Diagnostic procedure
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Diagnostic procedure

DTC P0328 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED 
  • Has the FREEZE FRAME DATA been recorded?
 Yes Go to the next step.
No Record FREEZE FRAME DATA on the repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Check for related Service Bulletins and/or online repair information availability.
  • Is any related repair information available?
 Yes Perform the repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 INSPECT KNOCK SENSOR CONNECTOR TERMINAL FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect the knock sensor connector.
  • Inspect for poor connection at terminals A and B (such as damaged, pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair terminal, then go to step 7.
No Go to the next step.
4 INSPECT KNOCK SENSOR 
 Yes Go to the next step.
No Replace the knock sensor, then go to step 7.
5 INSPECT KNOCK SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY 
  • Turn ignition switch to the ON position (Engine off).
  • Measure the voltage between knock sensor terminal A (harness-side) and body ground and knock sensor terminal B (harness-side) and body ground.
  • Is there any voltage?
 Yes Repair or replace the wiring harness for a short to the power supply, then go to step 7.
No Go to the next step.
6 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Disconnect the PCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the terminal, then go to the next step.
No Go to the next step.
7 VERIFY TROUBLESHOOTING OF DTC P0328 COMPLETED 
  • Make sure to connect all disconnected connectors.
  • Turn ignition switch to the ON position (Engine off).
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Start the engine and warm it up completely.
  • Is same DTC present?
 Yes Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION ).
No Go to the next step.
8 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No Troubleshooting completed.
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