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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 P0222: Throttle Position Sensor No. 2 Circuit - Low Input >> 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 TP Sensor Or Harness Malfunction -  Connect WDS or equivalent. Access TP2 PID. Disconnect throttle body 6-pin harness connector. Connect fused jumper wire between throttle body 6-pin harness connector terminal "B" (White wire) and terminal "C" (Brown/Red wire). See Fig 1. If voltage reading is more 4.9 volts, go to next step. If voltage reading is not more than 4.9 volts, go to step  5.
    Fig 1: Identifying TP Sensor Circuits & Harness Connector Terminals
    G00221503Courtesy of MAZDA MOTORS CORP.
  4. Inspect TP Sensor -  Perform TP sensor inspection. Refer to THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If TP sensor is okay, check for poor connection at throttle body 6-pin harness connector terminal "B" (White wire). Repair or replace terminal as necessary. After repair, go to step  8. If TP sensor is faulty, replace throttle body. After repair, go to step  8.
    5. NOTE: If DTC P0107 and P2228 are also retrieved with P0122, go to CONSTANT VOLTAGE  troubleshooting procedure under SYSTEM TESTS.
  5. Inspect Power Supply Circuit Voltage At Throttle Body Connector -  Turn ignition on, engine off. Measure voltage at throttle body 6-pin harness connector terminal "B" (White wire). If voltage reading is 4.5-5.5 volts, go to next step. If voltage reading is not 4.5-5.5 volts, repair or replace open circuit between throttle body 6-pin harness connector terminal "B" (White wire) and PCM 27-pin harness connector terminal "3N" (Violet/Red wire). See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  8.
  6. Verify TP2 Signal Circuit For Open Circuit -  Turn ignition off. Check continuity between throttle body 6-pin harness connector terminal "C" (Brown/Red wire) and PCM 27-pin harness connector terminal "3J". If continuity is present, go to next step. If continuity is not present, repair open circuit in wire harness between throttle body 6-pin harness connector terminal "C" (Brown/Red wire) and PCM 27-pin harness connector terminal "3J" (Brown/Black wire). After repair, go to step  8.
  7. Verify TP2 Signal Circuit For Short To Ground -  Inspect continuity between throttle body terminal "C" (Brown/Red wire) and body ground. See Fig 1. If continuity is not present, go to next step. If continuity is present, repair or replace short circuit to ground in wire harness between throttle body 6-pin harness connector terminal "C" (Brown/Red wire) and PCM 27-pin harness connector terminal "3J" (Brown/Black wire). See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to next step.
  8. Verify Trouble Shooting Of DTC P0222 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 it 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.
  9. 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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