Function Inspection Using M-MDS

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

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, online 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.
1		No	Go to the next step.
2	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 (EVAP system related). NOTE: Recording can be facilitated using the screen capture function of the PC.	-	Go to the next step.
3	PURPOSE: VERIFY IF FUEL GAUGE SENDER UNIT HAS MALFUNCTION Perform the DTC inspection for the PCM. (See DTC INSPECTION .) Are any of the following DTCs displayed? P0460:00 P0461:00 P0462:00 P0463:00	Yes	Perform the DTC troubleshooting for the fuel gauge sender unit first because the fuel gauge sender unit cannot detect the fuel tank level and determines that a malfunction is occurring. (See DTC P0460:00 .) (See DTC P0461:00 .) (See DTC P0462:00 (US) .) (See DTC P0463:00 (US) .)
3		No	Go to the next step.
4	PURPOSE: VERIFY FUEL TANK PRESSURE SENSOR MEASURED CORRECTLY Start the engine and idle it. Access the following simulation items using the M-MDS: (See SIMULATION INSPECTION .) PRG_DUTY CSTR_VENT_SOL_DUTY Change to the following conditions using the simulation function. PRG_DUTY: 100 % CSTR_VENT_SOL_DUTY: 100 % Access the FTP PID using the M-MDS. (See PID/DATA MONITOR INSPECTION .) Does the negative pressure change when racing the engine?	Yes	The fuel tank pressure sensor measures correctly. Go to the next step.
4		No	The possibility of a fuel tank pressure sensor malfunction is high. Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
5	PURPOSE: VERIFY IF PURGE SOLENOID VALVE IS STUCK OPEN Perform the following procedure to induct barometric pressure to the fuel tank. Access the following simulation items using the M-MDS: (See SIMULATION INSPECTION .) PRG_DUTY CSTR_VENT_SOL_DUTY Change to the following conditions using the simulation function. PRG_DUTY: 0 % CSTR_VENT_SOL_DUTY: 0 % Access the EVAP_PRES PID using the M-MDS. (See PID/DATA MONITOR INSPECTION .) NOTE: The displayed PID value is as follows: Approx. 2.6 V (barometric pressure) Perform the following procedure to force drive the CV solenoid valve. Access the following simulation items using the M-MDS: (See SIMULATION INSPECTION .) PRG_DUTY CSTR_VENT_SOL_DUTY Change to the following conditions using the simulation function. PRG_DUTY: 0 % CSTR_VENT_SOL_DUTY: 100 % Access the FTP PID using the M-MDS. (See PID/DATA MONITOR INSPECTION .) Is the FTP PID value negative pressure?	Yes	The possibility of a stuck purge solenoid valve open is high. Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 2.
5		No	The possibility of clogging between fuel tank pressure sensor and fuel tank is high. Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 3.