LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2000 >> Protege DX, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.6L >> Diagnostic Trouble Code Tests >> DTC P1569: Variable Tumble Control System (VTCS) Solenoid Valve Circuit, Low Input >> Diagnosis & Repair Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis & Repair Procedure

  1. Ensure FREEZE FRAME PID data has been recorded. Check service bulletins. Go to next step.
  2. Using scan tool, erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. Start engine. If DTC is reset, go to next step. If DTC is not present, see TROUBLE SHOOTING under BASIC DIAGNOSTIC PROCEDURES article.
  3. Leave ignition on. Disconnect manifold vacuum hose at VTCS solenoid valve. Connect vacuum pump at port on VTCS solenoid valve. Apply vacuum to valve. If vacuum does not hold for 5 seconds, go to next step. If vacuum holds for 5 seconds, go to step  5 .
  4. Turn ignition off. Disconnect VTCS solenoid valve connector. Apply vacuum to valve. If vacuum does not hold for 5 seconds, replace valve. Go to step  10 . If vacuum holds for 5 seconds, repair short to ground on Gray/Black wire between valve terminal "B" and PCM terminal No. 19. Go to step  10 .
  5. Check valve and harness connector terminals. If no problem is found, go to next step. If any problem is found, repair as necessary. Go to step  10 .
  6. Check resistance of VTCS solenoid valve. If resistance is 22-26 ohms, go to next step. If resistance is not 22-26 ohms, replace solenoid valve and go to step  10 .
  7. Turn ignition on. Measure voltage between harness connector terminal "A" (White/Red wire) and ground. If battery voltage is present, go to next step. If battery voltage is not present, repair White/Red wire and go to step  10 .
  8. Turn ignition off. Disconnect PCM connector. Check PCM and harness connector terminals. If no problem is found, go to next step. If any problem is found, repair as necessary. Go to step  10 .
  9. Connect EGR boost sensor solenoid valve connector. Disconnect PCM connector. Connect breakout box to PCM harness connector. Leave PCM disconnected. Turn ignition on. Check voltage between breakout box terminal No. 19 (Gray/Black wire) and ground. If battery voltage is present, go to next step. If battery voltage is not present, repair Gray/Black wire and go to next step.
  10. Reconnect all connectors. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. Start engine. If same DTC is not pending, go to next step. If same DTC is pending, replace PCM. Go to next step.
  11. Clear DTC from memory. Recheck for DTCs. If any DTC is present, diagnose and repair DTC. If no DTCs are present, test is complete.
scientia non olet · About LEMON Manuals