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Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  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. Classify Power Circuit Or Control Circuit Malfunction -  If same DTC is present or P0102, P0103 and P0403, repair power circuit (White wire) between main relay harness connector terminal "C" and appropriate component harness connector or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to next step. If same DTC is not present or P0102, P0103 and P0403, repair VAD control solenoid valve or control circuit (Green/White wire) between VAD harness connector terminal "B" and PCM 104-pin harness connector terminal No. 42 or replace wire harness. See Fig 1. After repair, go to step  6.
    Fig 1: Identifying VAD Control Solenoid Valve Circuits & Harness Connector Terminals
    G00221559Courtesy of MAZDA MOTORS CORP.
  4. Inspect VAD Control Solenoid Valve Connector For Poor Connection -  Turn ignition off. Disconnect VAD control solenoid valve harness connector. Check for poor connection (such as damaged, pulled-out pins, and corrosion). If no malfunction is present, go to next step. If any malfunction is present, repair or replace terminal. After repair, go to step  12.
  5. Inspect VAD Control Solenoid Valve Power Circuit For Open Circuit -  Turn ignition on, engine off. Measure voltage between VAD control solenoid valve harness connector terminal "A" (White wire) and body ground. If battery voltage is present, inspect VAD control solenoid valve. Refer to VARIABLE AIR DUCT CONTROL SOLENOID VALVE - MAZDA6 under RELAYS & SOLENOIDS in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If VAD control solenoid valve is okay, go to step  13. If VAD control solenoid valve is faulty, replace VAD control solenoid valve. After repair, go to step  12. If battery voltage is not present, repair open circuit in White wire between VAD control solenoid valve harness connector terminal "A" and main relay harness connector terminal "C" or replace wire harness. After repair, go to step  12.
  6. Inspect VAD Control Solenoid Valve Connector For Poor Connection -  Turn ignition off. Disconnect VAD control solenoid valve harness connector. Check for poor connection (such as damaged, pulled-out pins, and corrosion). If no malfunction is present, go to next step. If malfunction is present, repair or replace terminal. After repair, go to step  12.
  7. Inspect VAD Control Solenoid Valve Control Circuit For Short To Power -  Turn ignition on, engine off. Measure voltage between VAD control solenoid valve harness connector terminal "B" (Green/White wire) and body ground. See Fig 1. If battery voltage is not present, go to next step. If battery voltage is present, repair short circuit to power in Green/White wire between VAD control solenoid valve harness connector terminal "B" and PCM 104-pin harness connector terminal No. 42 or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  12.
  8. Inspect VAD Control Solenoid Valve Control Circuit For Short To Ground -  Turn ignition off. Check for continuity between VAD control solenoid valve terminal "B" (Green/White wire) and body ground. If no continuity is present, go to next step. If continuity is present, repair short circuit to ground in Green/White wire between VAD control solenoid valve terminal "B" and PCM 104-pin harness connector terminal No. 42 or replace wire harness. After repair, go to step  12.
  9. Inspect VAD Control Solenoid Valve -  Inspect VAD control solenoid valve. Refer to VARIABLE AIR DUCT CONTROL SOLENOID VALVE - MAZDA6 under RELAYS & SOLENOIDS in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If VAD control solenoid valve is okay, go to next step. If VAD control solenoid valve is faulty, replace VAD control solenoid valve. After repair, go to step  12.
  10. 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 terminal or replace wire harness. After repair, go to step  12.
  11. Inspect VAD Control Solenoid Valve Control Circuit For Open Circuit -  Turn ignition off. Check for continuity in Green/White wire between VAD control solenoid valve harness connector terminal "B" and PCM 104-pin harness connector terminal No. 42. See Fig 1. If continuity is present, go to next step. If continuity is not present, repair open circuit in Green/White wire between VAD control solenoid valve harness connector terminal "B" and PCM 104-pin harness connector terminal No. 42 or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to next step.
  12. Verify Trouble Shooting Of DTC P1410 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. Access RPM, ECT and TP_REL PIDs. Start engine and warm up until ECT PID is more than 158°F (70°C). Race engine a few times as follows:
    • RPM PID: more than 5800 RPM
    • TP_REL PID: more than 50 percent
    Retrieve DTCs. If same DTC is not present, go to next step. If PENDING CODE of 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.
  13. 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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