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Diagnostic procedure

DTC P0101 [AJ] DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED 
  • Has FREEZE FRAME DATA been recorded?
 Yes Go to the next step.
No Record FREEZE FRAME DATA on repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Check for related Service Bulletins and/or on-line repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 VERIFY CURRENT INPUT SIGNAL STATUS IS CONCERN INTERMITTENT OR CONSTANT 
  • Connect WDS or equivalent to DLC-2.
  • Start engine.
  • Access ECT, TP1 and MAF PIDs.
  • Warm up engine until ECT PID is 70 °C {158 °F} or above  .
  • Drive vehicle.
  • Read MAF PID when TP1 PID is 50% or above  .
  • Is MAF PID reading the threshold or below  ?
 Yes Make sure that TP1 PID changes smoothly when gradually opening throttle valve.
No Go to the next step.
4 VERIFY CURRENT INPUT SIGNAL STATUS-IS CONCERN INTERMITTENT OR CONSTANT 
  • Connect WDS or equivalent to DLC-2.
  • Start engine.
  • Access ECT, MAF and RPM PIDs.
  • Warm up engine until ECT PID is 70 °C {158°F} or above  .
  • Read MAF PID when RPM PID is 2,500 RPM or below  .
  • Is MAF PID reading 73 l/s or above  ?
 Yes Go to the next step.
No Intermittent concern exists. Go to "INTERMITTENT CONCERNS TROUBLESHOOTING".
(See INTERMITTENT CONCERN TROUBLESHOOTING ).
5 INSPECT MAF/IAT SENSOR CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect MAF/IAT sensor connector.
  • Check for poor connection (such as damaged, pulled-out pins, and corrosion).
  • Is there any malfunction?
 Yes Repair or replace the terminal, then go to Step 7.
No Go to the next step.
6 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect PCM connector.
  • Check for poor connection (such as damaged, pulled-out pins, and corrosion).
  • Is there any malfunction?
 Yes Repair or replace the terminal, then go to the next step.
No Replace MAF/IAT sensor, then go to the next step.
(See INTAKE AIR SYSTEM REMOVAL/INSTALLATION ).
7 VERIFY TROUBLESHOOTING OF DTC P0101 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Turn the ignition switch to the ON position.
  • Clear the DTC from the memory using the WDS or equivalent.
  • Start engine.
  • Warm up engine until ECT PID is 70 °C {158 °F} or above  .
  • Read MAF and RPM PIDs.
    NOTE:
    • MAF PID should indicate 73 l/s or below  when RPM PID is 2,500 RPM or below  .
  • Is PENDING CODE for this DTC present?
 Yes Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION ).
No Go to the next step.
8 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No Troubleshooting completed.
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