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Home >> Mazda >> 2003 >> MX-5 Miata Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P2010: Variable Tumble Control System Solenoid Valve Circuit - High Input >> Diagnostic Procedure
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Diagnostic Procedure

  1. Verify Related Repair Information Availability -  Turn ignition off. Connect scan tool to DLC-2. See Figure. Turn ignition on, engine off. Monitor for FREEZE FRAME DATA and ensure data has been recorded. Check service bulletins for repair information related to this DTC. If repair information is not available, go to next step. If repair information is available, perform diagnosis and repair as necessary. After repair, go to next step.
  2. Determine If Intermittent Concern Or Continuous Concern -  Leave ignition on. Using scan tool. Monitor for DTCs. If DTC P2010 is present again, go to next step. If DTC is not present, problem is intermittent. See INTERMITTENTS in TROUBLESHOOTING - NO CODES article.
  3. Determine If Open Circuit Or Short To Ground Malfunction -  Disconnect VTCS solenoid valve vacuum hose that connects to intake manifold. Connect vacuum pump to VTCS solenoid valve. Apply vacuum and wait 5 seconds. If vacuum is not maintained, go to next step. If vacuum is maintained, go to step  5.
  4. Inspect VTCS Solenoid Valve For Passage Control -  Turn ignition off. Disconnect VTCS solenoid valve 2-pin harness connector. Apply vacuum to VTCS solenoid valve and wait 5 seconds. If vacuum is maintained, repair short circuit to ground in Black/White wire between VTCS solenoid valve harness connector terminal "B" and PCM 17-pin harness connector terminal "2N". See Figure. See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. After repair, go to step  10. If vacuum is not maintained, replace VTCS solenoid valve. After repair, go to step  10.
  5. Inspect VTCS Solenoid Valve Connector For Poor Connection -  Turn ignition off. Disconnect VTCS solenoid valve 2-pin harness connector. Check for poor connection at VTCS connector terminals due to damaged, pulled-out pins, corrosion, etc. If connector terminals are okay, go to next step. If connector terminals are faulty, repair or replace as necessary. After repair, go to step  10.
  6. Inspect VTCS Solenoid Valve -  Measure resistance between VTCS solenoid valve terminals. If resistance reading is more than 28 ohms, go to next step. If resistance reading is not as specified, replace VTCS solenoid valve. After repair, go to step  10.
  7. Inspect VTCS Solenoid Valve Power Supply Circuit For Open Circuit -  Disconnect VTCS solenoid valve 2-pin harness connector. Turn ignition on, engine off. Measure voltage between ground and VTCS solenoid valve harness connector terminal "A" (White/Red wire). If battery voltage is present, go to next step. If battery voltage is not present, repair open circuit in White/Red wire between VTCS solenoid valve harness connector terminal "A" and main relay 4-pin harness connector terminal "D". See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. After repair, go to step  10.
  8. Inspect PCM Connector For Poor Connection -  Turn ignition off. Disconnect PCM 31-pin harness connector. See Figure. Check for poor connection at VTCS connector terminals due to damaged, pulled-out pins, corrosion, etc. If connector terminals are okay, go to next step. If connector terminals are faulty, repair or replace as necessary. After repair, go to step  10.
  9. Inspect VTCS Solenoid Valve Control Circuit For Short To Power -  Disconnect VTCS solenoid valve 2-pin harness connector. Turn ignition on, engine off. Measure voltage between ground and PCM 17-pin harness connector terminal "2N". If battery voltage is not present, go to next step. If battery voltage is present, repair short circuit to power in Black/White wire between VTCS solenoid valve harness connector terminal "B" and PCM 17-pin harness connector terminal "2N". After repair, go to next step.
  10. Verify Troubleshooting Of DTC P2010 Completed -  Return vehicle to original condition. Connect scan tool to DLC-2. See Figure. Clear DTCs from PCM memory. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Start engine and let idle until normal operating temperature is reached. Monitor for DTCs. If same DTC is not present, go to next step. If same DTC P2010 is present, replace PCM. For PCM removal and installation, see POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL, OVERHAUL & INSTALLATION article. After repair, go to next step.
  11. Verify After Repair Procedure -  Using scan tool, perform After Repair Procedure. See AFTER REPAIR PROCEDURE . If no other DTCs are present, testing is complete. If any other DTC is present, go to applicable test and repair.
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