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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. Verify Related Pending Code Or Stored DTCs -  Turn ignition off, then on (engine off). Verify related PENDING CODE or stored DTCs. If no other DTCs are present, go to next step. If any other DTCs are present, go to appropriate DTC trouble shooting procedure. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS .
  4. Inspect Throttle Body Connector For Poor Connection -  Turn ignition off. Disconnect throttle body 6-pin harness connector. Check for poor connection (such as damaged, pulled out terminals, corrosion). If malfunctions are not present, go to next step. If malfunctions are present, repair or replace terminals. After repair, go to step  10.
    5. NOTE: Wire color changes between throttle body 6-pin harness connector terminal "F" and PCM 30-pin harness connector terminal "4Y" at in-line harness connector "X-09".
  5. Inspect Power Supply Circuit Of Throttle Actuator For Open Circuit -  Turn ignition on, engine off. Measure voltage between throttle body terminal "F" (White/Green wire) and body ground. See Figure. If battery voltage is present, go to next step. If battery voltage is not present, repair open circuit between throttle body harness connector terminal "F" (White/Green wire) and PCM 30-pin harness connector terminal "4Y" (Blue/Black wire) or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  10.
  6. Inspect Power Supply Circuit Of Throttle Actuator For Short To Ground -  Turn ignition off. Check for continuity between throttle body 6-pin harness connector terminal "F" (White/Green wire) and body ground. If continuity is present, repair short circuit to ground between throttle body 6-pin harness connector terminal "F" (White/Green wire) and PCM 30-pin harness connector terminal "4Y" (Blue/Black wire) or replace wire harness. After repair, go to step  10.
  7. Inspect PCM Connector For Poor Connection -  Inspect for poor connection (such as damaged, pulled-out terminals, corrosion) at PCM harness connectors. If malfunction is not present, go to next step. If malfunction is present, repair or replace terminal. After repair, go to step  22.
  8. Inspect Control Circuit Of Throttle Actuator For Open Circuit -  Turn ignition off. Check for continuity between throttle body 6-pin harness connector terminal "E" (Black wire) and PCM 30-pin harness connector terminal "4AB" (Blue/White wire). See Figure. If continuity is present, go to next step. If continuity is not present, repair open circuit between throttle body 6-pin harness connector terminal "E" (Black wire) and PCM 30-pin harness connector terminal "4AB" (Blue/White wire) or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  22.
  9. Inspect Throttle Actuator -  Inspect throttle actuator. Refer to THROTTLE ACTUATOR under IDLE CONTROL in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If throttle actuator is okay, go to next step. If throttle actuator is faulty, replace throttle body. After repair, go to next step.
  10. Verify Trouble Shooting Of DTC P2102 Is Completed -  Make sure to reconnect all disconnected connectors. Turn ignition on, engine off. Clear DTC from PCM memory using WDS or equivalent. Start engine and run it at idle. Turn ignition off, then on (engine off). 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.
  11. 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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