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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 P2100: Throttle Actuator Control Motor Circuit/Open >> 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 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 pins, and corrosion). If malfunction is not present, go to next step. If any malfunction is present, repair or replace terminal. After repair, go to step  14.
  5. Inspect Throttle Actuator -  Inspect throttle actuator. Refer to THROTTLE ACTUATOR under IDLE CONTROL SYSTEM in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If no malfunction is present, go to next step. If throttle actuator is faulty, replace throttle body. After repair, go to step  14.
  6. Classify Malfunction At Power Supply Circuit Or Control Circuit -  Turn ignition on, engine off. Measure voltage between throttle body 6-pin harness connector terminal "B" (Green/Red wire) and body ground. If battery voltage is not present, malfunction is in supply circuit. Go to next step. If battery voltage is present, malfunction is in control circuit. Go to step  10.
  7. Inspect Throttle Actuator Power Circuit For Short To Ground -  Turn ignition off. Check for continuity between throttle body 6-pin harness connector terminal "B" (Green/Red wire) and body ground. See Fig 1. If continuity is not present, go to next step. If continuity is present, repair short circuit to ground in suspected wire between throttle body 6-pin harness connector terminal "B" (Green/Red wire) and PCM 104-pin harness connector terminal No. 54 (Blue/Black wire) or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  14.
    Fig 1: Identifying Throttle Actuator Control Motor Circuits & Harness Connector Terminals
    G00256839Courtesy of MAZDA MOTORS CORP.
  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 terminal or replace wire harness. After repair, go to step  14.
  9. Inspect Throttle Actuator Power Circuit For Open Circuit -  Turn ignition off. Check for continuity between throttle body 6-pin harness connector terminal "B" (Green/Red wire) and PCM 104-pin harness connector terminal No. 54 (Blue/Black wire). If continuity is present, go to step  14. If continuity is not present, repair open circuit in suspected wire between throttle body 6-pin harness connector terminal "B" (Green/Red wire) and PCM 104-pin harness connector terminal No. 54 (Blue/Black wire) or replace wire harness. After repair, go to step  14.
  10. Inspect Throttle Actuator Control Circuit For Short To Power -  Turn ignition on, engine off. Measure voltage between throttle body 6-pin harness connector terminal "A" (Black/Orange 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 suspected wire between throttle body 6-pin harness connector terminal "A" (Black/Orange wire) and PCM 104-pin harness connector terminal No. 80 (Blue/White wire) or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  14.
  11. Inspect Throttle Actuator Control Circuit For Short To Ground -  Turn ignition off. Check for continuity between throttle body 6-pin harness connector terminal "A" (Black/Orange wire) and body ground. If continuity is not present, go to next step. If continuity is present, repair short circuit to ground in suspected wire between throttle body 6-pin harness connector terminal "A" (Black/Orange wire) and PCM 104-pin harness connector terminal No. 80 (Blue/White wire) or replace wire harness. After repair, go to step  14.
  12. 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  14.
  13. Inspect Throttle Actuator Control Circuit For Open Circuit -  Turn ignition off. Check for continuity between throttle body 6-pin harness connector terminal "A" (Black/Orange wire) and PCM 104-pin harness connector terminal No. 80 (Blue/White wire). See Fig 1. If continuity is present, go to next step. If continuity is not present, repair open circuit in suspected wire between throttle body 6-pin harness connector terminal "A" (Black/Orange wire) and PCM 104-pin harness connector terminal No. 80 (Blue/White wire) or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to next step.
  14. Verify Trouble Shooting Of DTC P2100 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 warm up completely. 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.
  15. 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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