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Home >> Mazda >> 2006 >> 6 s, 4D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System AJ] >> DTC P2123 >> Diagnostic procedure
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Diagnostic procedure

DTC P2123 [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 INSPECT APP SENSOR CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect APP 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 8.
No Go to the next step.
4 INSPECT APP SENSOR NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER 
  • Turn the ignition switch to the ON position.
  • Measure voltage between APP sensor terminal F and body ground.
  • Is voltage B+  ?
 Yes Repair or replace harness for short to power, then go to Step 8.
No Go to the next step.
5 INSPECT APP SENSOR NO.1 
 Yes Replace accelerator pedal, then go to Step 8.
(See ACCELERATOR PEDAL REMOVAL/INSTALLATION ).
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 Step 8.
No Go to the next step.
7 INSPECT APP SENSOR NO.1 GROUND CIRCUIT FOR OPEN CIRCUIT 
  • Turn the ignition switch off.
  • Check continuity between APP sensor terminal E and PCM terminal 1X.
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace harness for open circuit, then go to the next step.
8 VERIFY TROUBLESHOOTING OF DTC P2123 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear DTC from PCM memory using WDS or equivalent.
  • Perform the KOEO or KOER SELF TEST using the WDS or equivalent.

    (See KOEO/KOER SELF TEST ).

  • Is the PENDING CODE same DTC present?
 Yes Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION ).
No Go to the next step.
9 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No Troubleshooting completed.
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