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Home >> Mazda >> 2024 >> CX-30 Preferred >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (On-Board Diagnostic - Engine Control (VIN Y) (1 Of 6)) >> DTC P0087-00: High Fuel Pressure Sensor System: Circuit Malfunction >> Function Inspection Using M-MDS

Function Inspection Using M-MDS

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P0087:00 (PCM - VIN Y) FUNCTION INSPECTION USING M-MDS

Step Inspection Results Action
1 PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA 
  • Is the DTC P0087:00 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 (VIN Y)] .)
2 PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION 
  • Record the freeze frame data/snapshot data.
    NOTE:
    • Recording can be facilitated using the screen capture function of the PC.
 - Go to the next step.
3 PURPOSE: VERIFICATION IF MALFUNCTION CAUSED BY LACK OF FUEL 
 Yes Refill the fuel.
Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification 1.
No 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 or replace the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (VIN Y)] .)
Go to the next step.
No Go to the next step.
5 PURPOSE: VERIFY CONNECTOR CONNECTIONS 
  • Start the engine.
  • Display the PCM PID [FUEL_PRES] using the M-MDS.
  • Does the PID value fluctuate when the following connectors are shaken?
    • High fuel pressure sensor
    • PCM
 Yes Repair or replace the applicable wiring harness or connector parts.
Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification 1.
No Go to the next step.
6 PURPOSE: VERIFY FUEL PRESSURE (LOW-SIDE) MALFUNCTION 
NOTE:
  • Verify the fuel pressure on the low pressure side with the operation of the high pressure fuel pump turned off.
  • Bleed the remaining pressure in the fuel line using the following procedure.
    1. Switch the ignition off.
    2. Disconnect the high pressure fuel pump connector.
    3. Remove the fuel pump relay. (Refer to RELAY LOCATION (VIN Y) in the service information.)
    4. Start the engine and wait until the engine stalls.
  • Switch the ignition off.
  • Install the fuel pump relay.
  • Switch the ignition ON (engine off).
  • Display PID [FUEL_PRES] and simulation item [FUEL_PUMP_REQ] using the M-MDS. (see SIMULATION INSPECTION .)
  • Turn simulation item [FUEL_PUMP_REQ] on.
  • Is the [FUEL_PRES] PID value 475-555 kPa {4.85-5.65 kgf/cm 2 , 68.9-80.4 psi}?
 Yes Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 2.
No Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
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