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Home >> Mazda >> 2006 >> MX-5 Miata Base >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System] >> DTC P0117 >> Diagnostic Procedure
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Diagnostic Procedure

DTC P0117 DIAGNOSTIC PROCEDURE TABLE

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED 
  • Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (Engine cooling system related) been recorded?
Yes Go to the next step.
No Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Verify 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 TERMINAL BENT 
  • Turn the ignition switch off.
  • Disconnect the ECT sensor connector.
  • Inspect for bent of ECT sensor terminals A and B (part-side).
  • Is there any malfunction?
Yes Repair or replace the terminal, then go to Step 7.
No Go to the next step.
4 CLASSIFY ECT SENSOR MALFUNCTION OR WIRING HARNESS MALFUNCTION 
  • Connect the WDS or equivalent to DLC-2.
  • Access ECT PID.
  • Verify ECT value when disconnecting ECT sensor connector.
  • Does the ECT value change?
Yes Replace the ECT sensor, then go to Step 7.
(See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
No Go to the next step.
5 INSPECT ECT SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND 
  • Turn the ignition switch off.
  • Inspect for continuity between ECT sensor terminal A (wiring harness-side) and body ground.
  • Is there continuity?
Yes Repair or replace the wiring harness for short to ground, then go to Step 7.
No Go to the next step.
6 INSPECT ECT SENSOR CIRCUIT FOR SHORT WIRING HARNESSES 
  • Inspect for continuity between ECT sensor terminal A and B (wiring harness-side).
  • Is there continuity?
Yes Repair or replace the wiring harness for short, then go to the next step.
No Go to the next step.
7 VERIFY TROUBLESHOOTING OF DTC P0117 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Start the engine, or perform the KOEO self-test with WDS or equivalent. (See KOEO/KOER SELF TEST  .)
  • Is the same DTC present?
Yes Replace the 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 troubleshooting.
(See DTC TABLE  .)
No Troubleshooting completed.