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Home >> Mazda >> 2003 >> 6 s, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls [Self-Diagnostics 3.0L] >> Diagnostic Tests >> DTC P2402: EVAP System Leak Detection Pump Control Circuit - High Input >> Diagnostic Procedure
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Diagnostic Procedure

  1. If FREEZE FRAME DATA has been recorded, go to next step. If FREEZE FRAME DATA has not been recorded, record FREEZE FRAME DATA. Go to next step.
  2. Verify Related Repair Information Availability -  Check for related Service Bulletins and/or on-line repair information availability. If any related repair information is available, perform repair or diagnosis according to available repair information. If vehicle is not repaired, go to next step. If related repair information is not available, go to next step.
  3. Verify Related Pending Code Or Stored DTCs -  Turn ignition off, then on (engine off). Verify pending code or stored DTCs using WDS or equivalent. If no other DTCs are present, go to next step. If DTC P2406 is present, go to diagnostic procedure for DTC P2406: EVAP SYSTEM LEAK DETECTION PUMP SENSE CIRCUIT - HIGH INPUT .
  4. Inspect EVAP System Leak Detection Pump Connector For Poor Connection -  Turn ignition off. Disconnect EVAP System Leak Detection Pump 4-pin harness connector. Inspect for poor connection (such as damaged, pulled-out terminals or corrosion). If malfunction is not present, go to next step. If malfunction is present, repair or replace terminal. After repair, go to step  7.
  5. Inspect EVAP System Leak Detection Pump Signal Circuit For Short To Power -  Turn ignition on, engine off. Measure voltage between EVAP system leak detection pump 4-pin harness connector terminal "D" (Pink wire) and body ground. See Figure. If voltage reading is not present, go to next step. If voltage reading is present, repair short to power circuit in Pink wire between EVAP system leak detection pump 4-pin harness connector terminal "D" and PCM 104-pin harness connector terminal No. 67 or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  7.
  6. Inspect PCM Connector For Poor Connection -  Turn ignition off. Disconnect PCM 104-pin harness connector. Inspect for poor connection (such as damaged, pulled-out terminals or corrosion). If malfunction is not present, go to next step. If malfunction is present, repair or replace terminal. After repair, go to next step.
  7. Verify Trouble Shooting Of DTC P2402 Is Completed -  Make sure to reconnect all disconnected connectors. Turn ignition on, engine off. Clear DTC from PCM memory using WDS or equivalent. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Run MODE 1 - PCM ADAPTIVE MEMORY PRODUCE DRIVE MODE , MODE 2 - EGR SYSTEM REPAIR VERIFICATION DRIVE MODE  and MODE 3 - HO2S HEATER, HO2S & TWC REPAIR VERIFICATION DRIVE MODE  . Stop vehicle. If same DTC is not present, go to next step. If same DTC is present, replace PCM. For PCM removal and installation, see POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL & INSTALLATION article. After repair, go to next step.
  8. Verify After Repair Procedure -  Using scan tool, perform After Repair Procedure. See AFTER REPAIR PROCEDURE . If any DTCs are present, go to appropriate DTC inspection. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are present, trouble shooting is complete.
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