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Home >> Mazda >> 2019 >> CX-9 Signature >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic - Engine Control System (1 Of 3) >> DTC P0140-00: Ho2S Circuit No Activity Detected >> Function Inspection Using M-MDS
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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 FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS 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 and DIAGNOSTIC MONITORING TEST RESULTS (A/F sensor, HO2S related) on the repair order.
- Go to the next step.
3 PURPOSE: VERIFY CONNECTOR CONNECTIONS
  • Start the engine.
  • Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST .)
    • HTR12
    • O2S12
    • When the following parts are shaken, does the PID value include a PID item which has changed?
    • HO2S
    • PCM
Yes Repair or replace the applicable connector parts.
Go to the troubleshooting procedure to perform the procedure from Step 10.
No Go to the next step.
4 PURPOSE: VERIFICATION IF MALFUNCTION CAUSED BY HO2S
Yes Go to the next step.
No Go to the troubleshooting procedure to perform the procedure from Step 1.
5 PURPOSE: VERIFICATION IF MALFUNCTION CAUSED BY HO2S HEATER
Yes Go to the troubleshooting procedure to perform the procedure from Step 1.
No Go to the troubleshooting procedure to perform the procedure from Step 9.