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Home >> Mazda >> 2006 >> 6 i, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System L3) >> DTC P0505 >> Diagnostic Procedure

Diagnostic Procedure

DTC P0505 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Check for related Service Bulletins and/or online 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.
2 VERIFY RELATED PENDING OR STORED DTCS 
  • Turn ignition switch to OFF, then ON. (Engine off)
  • Verify PENDING CODE or stored DTCs using the WDS or equivalent.
  • Is DTC P0506, P0507, P2100, P2101, P2102, P2103, P2107, P2108 or P2119 present?
Yes Perform applicable DTC inspection.
(See DTC TABLE ).
No Go to the next step.
3 INSPECT ELECTRONIC THROTTLE CONTROL SYSTEM OPERATION 
Yes Go to the next step.
No Repair or replace malfunctioning parts according to electronic throttle control system operation inspection results, then go to Step 9.
4 INSPECT A/C MAGNETIC CLUTCH OPERATION 
NOTE:
  • The following test should be performed for A/C. Go to the next step for vehicles without A/C.

  • Turn blower motor switch to off.
  • Is magnetic clutch still on?
Yes Go to "A/C ALWAYS ON /A/C COMPRESSOR RUNS CONTINUOUSLY." of ENGINE SYMPTOM TROUBLESHOOTING then go to Step 9.
(See ENGINE SYMPTOM TROUBLESHOOTING ).
No Go to the next step.
5 INSPECT GENERATOR CONTROL CIRCUIT MALFUNCTION 
  • Apply electrical load at idle.
  • Is engine speed increased?
Yes Go to the next step.
No Repair short to power supply in generator control circuit, then go to Step 9.
6 INSPECT AIR CLEANER ELEMENT 
  • Remove air cleaner element with engine running.
  • Does engine speed increase?
Yes Clean or replace air cleaner element, then go to Step 9.
No Go to the next step.
7 INSPECT THROTTLE BODY PASSAGE 
  • Is throttle body clogged?
Yes Clean or replace throttle body passage, then go to Step 9.
No Go to the next step.
8 INSPECT ENGINE COMPRESSION 
Yes Go to the next step.
No Overhaul engine, then go to the next step.
9 VERIFY TROUBLESHOOTING OF DTC P0505 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear DTC using the WDS or equivalent.
  • Perform vehicle self-test.
  • Is same DTC present?
Yes Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION ).
No Go to the next step.
10 VERIFY AFTER REPAIR PROCEDURE 
Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No Troubleshooting completed.