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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 635 (On-Board Diagnostic (Engine Control System L5) (3 Of 5)) >> DTC P050B:00 [L5] >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
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 (cold start emission reduction strategy monitoring related) been recorded?
Yes Go to the next step.
No Record FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on 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 IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA 
  • Is the P050B-00 on FREEZE FRAME DATA?
Yes Go to the next step
No Go to troubleshooting procedures for DTC on FREEZE FRAME DATA.
(See DTC TABLE [L5] .)
4 INSPECT CKP SENSOR AND PULSE WHEEL 
  • Visually inspect the CKP sensor and pulse wheel.
  • Is there any damage or chip on the CKP sensor and pulse wheel?
Yes Repair or replace the malfunctioning part according to the inspection results, then go to Step 8.
No Go to the next step
5 INSPECT CKP SENSOR 
Yes Replace the CKP sensor, then go to Step 8.
(See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L5] .)
No Go to the next step.
6 INSPECT CMP SENSOR AND PULSE WHEEL 
  • Visually inspect the CMP sensor and pulse wheel.
  • Is there any damage or chip on the CMP sensor and pulse wheel?
Yes Repair or replace the malfunctioning part according to the inspection results, then go to Step 8.
No Go to the next step.
7 INSPECT CMP SENSOR 
Yes Replace the CMP sensor, then go to the next step.
(See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L5] .)
No Go to the next step.
8 VERIFY DTC TROUBLESHOOTING COMPLETED 
  • Clear the DTC from the PCM memory using the M-MDS
  • Start the engine and warm it up completely.
  • Is the PENDING CODE for this DTC present?
Yes Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L5] .)
No Go to the next step.
9 VERIFY AFTER REPAIR PROCEDURE 
Yes Go to the applicable DTC inspection.
(See DTC TABLE [L5] .)
No DTC troubleshooting completed