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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 61 (Engine Controls [Self-Diagnostics 3.0L]) >> Diagnostic Tests >> DTC P2105: Throttle Actuator Control System - Forced Engine Shutdown >> Diagnostic Procedure

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 Intermittent Concern Or Continuous Concern -  Clear DTC using WDS or equivalent. Start engine and let idle. If same DTC is present, go to next step. If same DTC is not present, problem is intermittent. Refer to INTERMITTENT PROBLEM DIAGNOSIS in TROUBLE SHOOTING - NO CODES article.
  4. Inspect ET Control Relay Connector For Poor Connection -  Turn ignition off. Disconnect ET control relay 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 faulty terminal. After repair, go to step  9.
  5. Inspect ET Control Relay Circuit For Short To Ground -  Turn ignition off. Check for continuity between ET control relay harness connector terminal "E" (Black/Yellow wire) and body ground. See Figure. If no continuity is present, go to next step. If continuity is present, repair short circuit to ground in Black/Yellow wire between ET control relay harness connector terminal "E" and PCM 104-pin harness connector terminal No. 28 or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  9.
  6. Inspect ET Control Relay Circuit For Short To Power -  Turn ignition on, engine off. Measure voltage between ET control relay harness connector terminal "C" (Pink wire) and body ground. If battery voltage is not present, go to next step. If battery voltage is present, repair short circuit to power in Pink wire between ET control relay harness connector terminal "C" and PCM 104-pin harness connector terminal No. 92 or replace wire harness. After repair, go to step  9.
  7. Inspect ET Control Relay -  Inspect ET control relay. Refer to MAIN RELAY under RELAYS & SOLENOIDS in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If no malfunction is present, go to next step. If ET control relay is faulty, replace ET control relay. After repair, go to step  9.
  8. 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.
  9. Verify Trouble Shooting Of DTC P2105 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. Start engine and run at idle. If PENDING CODE of 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.
  10. 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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