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Home >> Mazda >> 2021 >> MX-5 Miata RF Club, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic - Engine Control (1 Of 3) >> DTC P0100-00: Mass Air Flow Sensor Circuit Performance Problem >> PID Item/Simulation Item Used In Diagnosis >> Function Inspection Using M-MDS

Function Inspection Using M-MDS

DIAGNOSTIC PROCEDURE - FUNCTION INSPECTION USING M-MDS

STEP INSPECTION RESULTS ACTION
1 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.
2 PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
NOTE:
  • 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.
3 PURPOSE: VERIFY RELATED PENDING CODE AND/OR DTC
  • Switch the ignition off, then ON (engine off).
  • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST .)
  • Are any other PENDING CODEs and/or DTCs present?
 Yes Go to the applicable PENDING CODE or DTC inspection.
(See DTC TABLE .) Go to the next step.
No Go to the next step.
4 PURPOSE: VERIFY MAF SENSOR/IAT SENSOR No. 1 INPUT SIGNAL
  • Start the engine and idle it.
  • Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST .)
    • MAF
      • IAT
  • Is the PID value within specification?
 Yes Go to the next step.
No Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
5 PURPOSE: VERIFY CONNECTOR CONNECTIONS
  • Start the engine.
  • Access the MAF and IAT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .)
  • Does the PID value fluctuate when the following connectors are shaken?
    • MAF sensor/IAT sensor No. 1
      • PCM
 Yes Repair or replace the applicable wiring harness or connector parts.
Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 9.
No Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
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