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Home >> Mazda >> 2021 >> 3 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> On-Board Diagnostic - Engine Control System (VINS 7, L, M) (1 Of 4) >> DTC P0134-00: A/F Sensor Circuit No Activity Detected >> 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 OR SERVICE INFORMATION AVAILABILITY
  • Verify related Service Bulletins, on-line repair information, or Service Information availability.
  • Is any related Information available?
 Yes Perform repair or diagnosis according to the available information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
2 PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
  • Is the DTC P0134:00 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 [PCM (VINs 7, L, M) (US)] .)
3 PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
  • Record the freeze frame data/snapshot data and diagnostic monitoring test results (A/F sensor, HO2S related).
    NOTE:
    • Recording can be facilitated using the screen capture function of the PC.
 - Go to the next step.
4 PURPOSE: INSPECT FOR OTHER RELATED DTCs
  • Perform the DTC inspection for the PCM. (See DTC INSPECTION .)
  • Are any other DTCs displayed?
 Yes Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (VINs 7, L, M) (US)] .)
No Go to the next step.
5 PURPOSE: PERFORM DTC INSPECTION RELATED TO A/F SENSOR OPEN CIRCUIT
 - Go to the next step.
6 PURPOSE: VERIFY A/F SENSOR INPUT SIGNAL
  • Start the engine and warm it up completely.
  • Access the A/F_SEN_CUR PID using the M-MDS. (See PID/DATA MONITOR INSPECTION .)
  • Drive the vehicle under the following conditions.
    WARNING:
    • When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.
    • While performing this step, always operate the vehicle in a safe and lawful manner.
    • After increasing the engine speed to 3, 000 rpm, decelerate using engine braking.
  • Is the displayed PID value as follows?
    • A/F_SEN_CUR: 0.25 mA or more
 Yes Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 2.
No Go to the next step.
7 PURPOSE: INSPECT RELATED SENSOR WIRING HARNESS AND CONNECTOR
  • Access the A/F_SEN_CUR PID using the M-MDS. (See PID/DATA MONITOR INSPECTION .)
  • Does the PID value fluctuate when the following connectors are shaken?
  • A/F sensor
    • PCM
 Yes Inspect the related wiring harness and connector.
  • Repair or replace the malfunctioning part.

Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification.
No Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
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