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Home >> Mazda >> 2021 >> CX-5 Sport, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (On-Board Diagnostic - Engine Control (VIN Y) (2 Of 3)) >> DTC P0402-00: EGR Flow Excessive Detected >> PID Item/Simulation Item Used In Diagnosis >> Function Inspection Using M-MDS

Function Inspection Using M-MDS

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DIAGNOSTIC PROCEDURE - FUNCTION INSPECTION USING M-MDS

STEP INSPECTION ACTION
1 PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
  • Recording can be facilitated using the screen capture function of the PC.
  • Record the FREEZE FRAME DATA/snapshot data on the repair order.
   Go to the next step.
2 PURPOSE: 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 PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
  • Is the DTC P0402:00 on FREEZE FRAME DATA?
 Yes Go to the next step.
No Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA.
(See DTC TABLE .)
4 PURPOSE: VERIFY IF DIAGNOSTIC RESULT IS AFFECTED BY OTHER RELATED DTCs OCCURRING
  • Switch the ignition off, then ON (engine off).
  • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST .)
  • Is the other PENDING CODE/DTC also present?
 Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No Go to the next step.
5 PURPOSE: VERIFY IF THERE IS PID ITEM CAUSING DRASTIC CHANGES OF ACCELERATION FLUCTUATION BY INPUT SIGNAL TO PCM
  • Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST .)

    PCM:

    • MAF
    • MAP
      • MAP_V
  • Is there any signal that is far out of specification?
 Yes Go to the next step.
No Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
6 PURPOSE: VERIFY CONNECTOR CONNECTIONS
  • Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST .)

    PCM:

    • MAF
    • MAP
      • MAP_V
  • When the following parts are shaken, does the PID value include a PID item which has changed?
    • MAF sensor
    • MAP sensor
      • PCM
 Yes Repair or replace the applicable connector parts.
Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 5.
No Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
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