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DTC P24D9-00: Fuel tank pressure sensor circuit intermittent
 
 
 
 
CIRCUIT OPERATION
  • A power voltage of 5 volts is applied to the fuel tank pressure sensor connector terminal number 3 from the ECM connector terminal number 77.
  • The power voltage is grounded to the ECM connector terminal number 78 from the fuel tank pressure sensor connector terminal number 1.
  • The signal voltage according to the pressure inside the fuel tank is output to the ECM connector terminal number 88 from the fuel tank pressure sensor connector terminal number 2.
 
 
TECHNICAL DESCRIPTION
During the key-off evaporative leakage monitoring, it is judged as a failure when the frequency of the measured value of the sensor crossing the filter value of the sensor itself is high during the predetermined time.
 
 
MONITOR EXECUTION
Once per driving cycle.
 
 
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Evaporative emission purge solenoid monitor
  • Bypass valve monitor
  • Fuel tank solenoid valve monitor
  • Switching valve monitor
  • Canister pressure sensor monitor
  • Manifold absolute pressure sensor monitor
  • Fuel tank pressure sensor monitor
  • Fuel tank differential pressure sensor monitor
  • Barometric pressure sensor/manifold absolute pressure correlation
  • Barometric pressure sensor monitor
  • Fuel level sensor monitor
  • Engine off timer monitor
  • Controller area network (CAN) monitor
Sensor (The sensors below are determined to be normal)
  • Engine coolant temperature sensor
  • Intake air temperature sensor
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • Power supply mode of electric motor switch is OFF.
  • 12V battery positive voltage is 11 volts or higher.
  • Engine coolant temperature is higher than 4°C (39°F) and lower than 35°C (95°F).
  • Intake air temperature at ECM wake-up is higher than 4°C (39°F) and lower than 35°C (95°F).
  • ECM is woken up in 5, 6 or 8.5 hours since the power supply mode of electric motor switch was OFF.
  • Barometric pressure is 76 kPa (22.4 in.Hg) or higher.
  • Fuel level is 85 percent or less.
  • Fuel tank pressure at ECM wake-up is less than 19.96 kPa (5.89 in.Hg) or more than 40.00 kPa (11.81 in.Hg).
  • Accumulated time that electric motor switch is ON is more than 1,620 seconds.
Judgment Criterion
  • Sensor signal fluctuation is detected higher than 20 times.
 
 
FAIL-SAFE AND BACKUP FUNCTION
Indicates "REFUELING SYSTEM SERVICE REQUIRED" on the information screen in the multi-information display.
 
 
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function, OBD-II Drive Cycle – Pattern 4 OBD- II DRIVE CYCLE.
 
 
TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CODE TO BE SET ARE:)
  • Fuel tank pressure sensor failed.
  • Fuel tank differential pressure sensor failed.
  • Fuel tank differential pressure sensor circuit harness damage, or connector damage.
  • ECM failed.
 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • MB992145: Fuel leak check cap
1.STEP 1. Using scan tool (M.U.T.-III SE), check the data list.
(1) Connect the scan tool (M.U.T.-III SE) to the data link connector.
(2) Power supply mode of electric motor switch is ON.
(3) Remove the fuel tank cap.
(4) Use scan tool (M.U.T.-III SE) to check the data list (Refer to DATA LIST REFERENCE TABLE).
  • Item number 850: EVAP System Absolute Pressure Sensor
    • When altitude is 0 m (0 ft.): 101 kPa (29.8 in.Hg).
    • When altitude is 600 m (1,969 ft.): 95 kPa (28.1 in.Hg)
    • When altitude is 1,200 m (3,937 ft.): 88 kPa (26.0 in.Hg)
    • When altitude is 1,800 m (5,906 ft.): 81 kPa (23.9 in.Hg)
(5) Install special tool fuel leak check cap (MB992145).
(6) Install the hose and pressure gauge to the special tool as shown.
(7)
caution
  • Do not pressurize suddenly.
  • Do not pressurize 11.76 kPa (3.47 in.Hg) or more to prevent the damage of components.
Pressurise while checking the pressure gauge and hold if it reaches from 9.80 to 11.76 kPa (2.89 to 3.47 in.Hg).
OK: The value read from the M.U.T.-III SE data list rises while pressurizing.
(8) Turn the power supply mode of the electric motor switch to OFF, and disconnect the scan tool (M.U.T.-III SE).
(9) Remove the special tool fuel leak check cap (MB992145), the hose and the pressure gauge, and reinstall the fuel cap.
Q: Is the check result normal?
 
2.STEP 2. Check of damage in wiring harness between fuel tank pressure sensor connector terminal number 2 and ECM connector terminal number 88.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
3.STEP 3. Check of damage in wiring harness between fuel tank pressure sensor connector terminal number 1 and ECM connector terminal number 78.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
4.STEP 4. Check of damage in wiring harness between fuel tank pressure sensor connector terminal number 3 and ECM connector terminal number 77.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
5.STEP 5. Using scan tool (M.U.T.-III SE), check the data list.
Use scan tool (M.U.T.-III SE) to check the data list (Refer to DATA LIST REFERENCE TABLE).
  • Item number 850: EVAP System Absolute Pressure Sensor
    OK: The fuel tank pressure increases while applying pressure.
Q: Is the check result normal?
Replace the fuel tank pressure sensor (Refer to ENGINE, Fuel Supply – Fuel Tank – Fuel Tank Disassembly and Assembly FUEL TANK DISASSEMBLY AND ASSEMBLY). Then
 
6.STEP 6. Using scan tool (M.U.T.-III SE), check the data list.
Use scan tool (M.U.T.-III SE) to check the data list (Refer to DATA LIST REFERENCE TABLE).
  • Item number 480: Tank pressure sensor noise NG
Q: Is the check result normal?
Intermittent malfunction (Refer to GENERAL INFORMATION, General Information – How to Use Troubleshooting/Inspection Service Points – How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).
Replace the fuel tank differential pressure sensor (Refer to ENGINE, Fuel Supply – Fuel Tank – Fuel Tank Disassembly and Assembly FUEL TANK DISASSEMBLY AND ASSEMBLY). Then
 
7.STEP 7. Using scan tool (M.U.T.-III SE) to check the data list after perform the evaporative emission system monitor test.
(1) Perform the evaporative emission system monitor test (Refer to EVAPORATIVE EMISSION CONTROL SYSTEM MONITOR TEST).
(2) Use scan tool (M.U.T.-III SE) to check the data list (Refer to DATA LIST REFERENCE TABLE).
  • Item number 480: Tank pressure sensor noise NG
Q: Is the check result normal?
The inspection is complete.
Replace the ECM (Refer to ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION).