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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 60 (Engine Controls [Self-Diagnostics 2.3L]) >> Diagnostic Tests >> DTC P2100: Throttle Actuator 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 Or Continuous Concern -  Clear DTC using WDS or equivalent. Start engine and let idle. If same PENDING CODE is present, go to next step. If same PENDING CODE is not present, problem is intermittent. Refer to INTERMITTENTS 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 terminals, corrosion). If malfunctions are not present, go to next step. If malfunctions are present, repair or replace terminals. After repair, go to step  13.

  5. Inspect Throttle Valve Electrical Malfunction -  Measure resistance between throttle body 6-pin connector terminals "E" and "F" (part-side). If resistance reading is about 1.3 ohms, go to next step. If resistance reading is not about 1.3 ohms, replace throttle body. After repair, go to step  13.
  6. Classify Malfunction In Power Supply Circuit Or Control Circuit -  Turn ignition on, engine off. Measure voltage between throttle body 6-pin harness connector terminal "F" (White/Green wire) and body ground. See Fig 1. If battery voltage is not present, malfunction is in power supply circuit. Go to next step. If battery voltage is present, malfunction is in PCM. Go to step  9.
    Fig 1: Identifying Throttle Body Circuits & Harness Connector Terminals
    G00221524Courtesy of MAZDA MOTORS CORP.
    7. 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".
  7. Inspect Power Circuit 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 not present, go to next step. If continuity is present, repair short to ground in power circuit 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. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  13.
  8. Inspect Power Circuit For Open -  Turn ignition off. Check for continuity between throttle body 6-pin harness connector terminal "F" (White/Green wire) and PCM 30-pin harness connector terminal "4Y" (Blue/Black wire). If continuity is present, go to next step. If continuity is not present, repair open in power circuit 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  13.
  9. Inspect PCM Connector For Poor Connection -  Inspect for poor connection (such as damaged, pulled-out terminals, corrosion) at PCM 30-pin harness connector. If malfunction is not present, go to next step. If malfunction is present, repair or replace terminal. After repair, go to step  13.
  10. Inspect Control Circuit For Short To Power -  Turn ignition on, engine off. Measure voltage between throttle body 6-pin harness connector terminal "E" (Black wire) and body ground. See Fig 1. If battery voltage is present, repair or replace wire harness for short circuit to power 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  13.
  11. Inspect Control Circuit For Short To Ground -  Turn ignition off. Check for continuity between throttle body 6-pin harness connector terminal "E" (Black wire) and body ground. If continuity is not present, go to next step. If continuity is present, repair short circuit to ground in control 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. After repair, go to step  13.
  12. Inspect Control Circuit Malfunction For Open Circuit -  Check for continuity between throttle body 6-pin harness connector terminal "E" (Black wire) and PCM terminal "4AB" (Blue/White wire). 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 terminal "4AB" (Blue/White wire) or replace wire harness. After repair, go to next step.
  13. Verify Trouble Shooting Of DTC P2100 Is Completed -  Make sure to reconnect all disconnected connectors. Clear DTC from PCM memory using WDS or equivalent. Turn ignition off. Start engine and warm up completely. 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.
  14. 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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