M20F-FXS, M20G-FXS ENGINE CONTROL SFI SYSTEM P244B00 Particulate Filter Differential Pressure Too High Bank 1
DESCRIPTION
The GPF (Gasoline Particulate Filter) system is an exhaust purification system for processing the PM (Particulate Matter) discharged from the engine. The GPF catalyst has a porous ceramic structure that collects PM, and the collected PM is oxidized as it bonds with oxygen molecules under high temperature. When the fuel cut operation is performed after the GPF rises to a high temperature under high load operation, PM is oxidized, but under low temperature conditions, PM oxidation is insufficient and deposits accumulate. When the GPF is clogged by PM and "Exhaust Filter Full" is displayed on the multi-information display or GPF warning light comes on, perform particulate filter regeneration using the GTS.
A differential pressure sensor is installed to monitor the pressure before the GPF catalytic converter. The sensor is a semiconductor type that is not affected by the exhaust gas. The differential pressure sensor outputs the difference between the atmospheric pressure and the pressure before the GPF catalyst.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|
| P244B00 | Particulate Filter Differential Pressure Too High Bank 1 | When it is estimated that the GPF differential pressure will increase to the limit value or more and the intake air flow does not exceed 50 gm/sec* (1 trip detection logic). | ·
Front exhaust pipe assembly (GPF) ·
Differential pressure sensor ·
Mass air flow meter ·
Wire harness or connector ·
ECM |
Comes on | SAE Code: P244B |
*: Varies with exhaust gas temperature
MONITOR DESCRIPTION
When particulate matter and ash accumulate in the GPF, it becomes difficult for the exhaust gas to flow and the GPF differential pressure increases, so the ECM limits the intake air flow to protect parts.
After the limit value of the intake air flow drops below the threshold, if a driving operation equal to or higher than the current load is performed and it is estimated that the GPF differential pressure will increase to the limit value or more, when the intake air flow reaches the limit value, excessive accumulation is detected in the GPF, a DTC is output and the MIL illuminates.
MONITOR STRATEGY
| Frequency of Operation | Once per driving cycle |
CONFIRMATION DRIVING PATTERN
- HINT:
- ·
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
·When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Put the engine in Inspection Mode (Maintenance Mode).
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) [A].
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on.
Put the engine in Inspection Mode (Maintenance Mode).
Start the engine and idle it for 5 minutes or more [B].
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON (READY).
Repeat the pattern of accelerating the vehicle from rest to approximately 60 km/h (37 mph) and then decelerating the vehicle 5 times [C].
- CAUTION:
-
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes [D].
Read the pending DTCs.
- HINT:
- ·
If a pending DTC is output, the system is malfunctioning.
·If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P244B00.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL | ·
DTC judgment completed ·
System normal |
| ABNORMAL | ·
DTC judgment completed ·
System abnormal |
| INCOMPLETE | ·
DTC judgment not completed ·
Perform driving pattern after confirming DTC enabling conditions |
- HINT:
- ·
If the judgment result is NORMAL, the system is normal.
·If the judgment result is ABNORMAL, the system has a malfunction.
·If the judgment result is INCOMPLETE, perform steps [B] through [D] again.
·[B] to [D]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
·When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
WIRING DIAGRAM
Refer to DTC P010012 for the mass air flow meter circuit.
Refer to DTC P245211 for the differential pressure sensor circuit
CAUTION / NOTICE / HINT
- NOTICE:
- ·
Vehicle Control History may be stored in the hybrid vehicle control ECU if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.
(Select Powertrain in Health Check and then check the time stamp data.)
·If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
- HINT:
-
Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
Record the Vehicle Control History.
- Powertrain > Engine > Utility
-
Tester Display Vehicle Control History (RoB) - 50005 372 55
Read the DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTC P244B00 and other DTCs are output A DTC P244B00 or RoB X0858, X0859 is output B
- HINT:
-
If any DTCs other than P244B00 are output, troubleshoot those DTCs first.
A
B
Read the value displayed on the GTS.
- Powertrain > Engine > Data List
-
Tester Display Ash Deposition Ratio Bank1 - 50003 372 822
- Standard:
GTS Display Specified Condition Ash Deposition Ratio Bank1 Less than 100%
- Result:
Proceed to OK NG
- HINT:
-
Clear the GPF deterioration record using the GTS after replacing the front exhaust pipe assembly (GPF).
OK
NG
Clear the DTCs.
- Powertrain > Engine > Clear DTCs
- 50002 372
- Result:
Proceed to NEXT
Turn the ignition switch off and wait for at least 30 seconds.
NEXT
| *1 | Differential Pressure Sensor | *2 | Vacuum Transmitting Hose Assembly |
| *3 | No. 1 Pipe | - | - |
Check if vacuum transmitting hose assembly between the differential pressure sensor and the No. 1 pipe is correct.
Check that there is no exhaust gas leak between the differential pressure sensor and the No. 1 pipe.
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to OK NG
OK
NG
Read the values displayed on the GTS.
- Powertrain > Engine > Data List
-
Tester Display PM Deposition Ratio Bank1 - 50003 372 821
- HINT:
-
Data List item "PM Deposition Ratio Bank1" is necessary after performing particulate filter regeneration. Therefore, make sure check them.
- Result:
Proceed to NEXT
NEXT
- Result:
Proceed to NEXT
NEXT
Read the value displayed on the GTS.
- Powertrain > Engine > Data List
-
Tester Display PM Deposition Ratio Bank1 - 50003 372 821
- Standard:
GTS Display Specified Condition PM Deposition Ratio Bank1 Less than 30%
- HINT:
-
After performing particulate filter regeneration, if the value of Data List items "PM Deposition Ratio Bank1" is less than the value during step 6 (READ VALUE USING GTS (PM DEPOSITION RATIO)), the driving condition may not be suitable for particulate filter regeneration. Therefore, perform particulate filter regeneration again.
- Result:
Proceed to OK NG
OK
NG
Clear the DTCs.
- Powertrain > Engine > Clear DTCs
- 50002 372
- Result:
Proceed to NEXT
Turn the ignition switch off and wait for at least 30 seconds.
NEXT
Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
Read the DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTCs are not output A DTC P244B00 is output B
A
B
Put the engine in Inspection Mode (Maintenance Mode).
- Powertrain > Hybrid Control > Utility
-
Tester Display Inspection Mode - 50005 397 2103
Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.
- Powertrain > Engine > Data List
-
Tester Display Coolant Temperature - 50003 372 205
Read Mass Air Flow Sensor while maintaining an engine speed of 2500 rpm.
- Powertrain > Engine > Data List
-
Tester Display Engine Speed Mass Air Flow Sensor - 50003 372 211,215
- Standard:
GTS Display Condition Specified Condition Mass Air Flow Sensor ·Engine warmed up
·Shift lever position: P
·A/C: Off
·Engine Speed: 2500 rpm
Between 6.2 and 18.6 gm/sec
- Result:
Proceed to OK NG
- HINT:
-
Clear the GPF deterioration record using the GTS after replacing the front exhaust pipe assembly (GPF).
OK
- HINT:
-
Clear the GPF deterioration record using the GTS after replacing the converter with catalyst assembly (GPF).
NG
Disconnect the differential pressure sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C140-3 (VC) - C141-69 (VCPX) Always Below 1 Ω C140-2 (PEX) - C141-92 (PEX) Always Below 1 Ω C140-1 (E2) - C141-68 (EPEX) Always Below 1 Ω C140-3 (VC) or C141-69 (VCPX) - Body ground and other terminals Always 10 kΩ or higher C140-2 (PEX) or C141-92 (PEX) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Replace the differential pressure sensor.
Put the engine in Inspection Mode (Maintenance Mode).
- Powertrain > Hybrid Control > Utility
-
Tester Display Inspection Mode - 50005 397 2103
Start the engine and allow it to idle until the engine coolant temperature reaches 75°C (167°F) or higher.
- Powertrain > Engine > Data List
-
Tester Display Coolant Temperature - 50003 372 205
Idle the engine for 7 minutes.
Run the engine at an engine speed of 2500 rpm for 2 minutes.
Turn the ignition switch off and wait for 30 seconds or more.
- Result:
Proceed to NEXT
NEXT
Disconnect the mass air flow meter connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition C26-4 (VCC) - C26-2 (E2G) Ignition switch ON 4.8 to 5.2 V C26-3 (FG) - C26-2 (E2G) Ignition switch ON 4.8 to 5.2 V
Turn the ignition switch off and wait for at least 30 seconds.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C26-4 (VCC) - C26-3 (FG) Ignition switch off 2.09 to 2.31 kΩ
- Result:
Proceed to OK NG
OK
- HINT:
-
Perform "Inspection After Repair" after replacing the mass air flow meter.
NG
Disconnect the mass air flow meter connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C26-4 (VCC) - C141-78 (VCVG) Always Below 1 Ω C26-3 (FG) - C141-101 (VG) Always Below 1 Ω C26-2 (E2G) - C141-79 (E2G) Always Below 1 Ω C26-4 (VCC) or C141-78 (VCVG) - Body ground and other terminals Always 10 kΩ or higher C26-3 (FG) or C141-101 (VG) - Body ground and other terminals Always 10 kΩ or higher C26-2 (E2G) or C141-79 (E2G) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG