M20C-FKS 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 | Memory | 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 55 gm/sec* (1 trip detection logic). | ·
Front exhaust pipe assembly (GPF) ·
Differential pressure sensor ·
Mass air flow meter sub-assembly ·
Wire harness or connector ·
ECM |
Comes on*/-
*: The MIL is illuminated when PM or ash accumulation has progressed and protection of parts has become necessary. |
DTC stored | SAE: 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.
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.
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Idle the engine for 5 minutes or more [A].
Turn the ignition switch off and wait for at least 30 seconds.
Start the engine.
Repeat the pattern of accelerating the vehicle from rest to approximately 60 km/h (37 mph) [depress the accelerator pedal by a large amount at M or 2nd gear and then decelerating the vehicle 5 times [B].
- 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.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
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 [A] through [C] again.
·[A] to [C]: 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 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 U060187 for the differential pressure sensor circuit.
CAUTION / NOTICE / HINT
- HINT:
- ·
Clear the Vehicle Control History after completing repairs.
·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 Vehicle Control History code X0858, X0859 or DTC P244B00 is output A DTC P244B00 and other DTCs are 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
Turn the ignition switch off and wait for at least 30 seconds.
- Result:
Proceed to NEXT
NEXT
| *1 | Differential Pressure Sensor | *2 | Vacuum Transmitting Hose Assembly |
Check if vacuum transmitting hose assembly between the differential pressure sensor and the exhaust manifold is correct.
Check that there is no exhaust gas leak between the differential pressure sensor and the exhaust manifold.
- 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 regenerate. 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 regenerate 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 regenerate. Therefore, perform particulate filter regenerate again.
- Result:
Proceed to OK NG
OK
NG
Clear the DTCs.
- Powertrain > Engine > Clear DTCs
- 50002 372
Turn the ignition switch off and wait for at least 30 seconds.
- Result:
Proceed to NEXT
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
Start the engine.
Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.
Read Mass Air Flow Sensor while maintaining an engine speed of 3000 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 position: P
A/C: Off
Engine Speed: 3000 rpmBetween 8 and 13 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
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 C72-3 (VC) - C71-128 (VSPE) Always Below 1 Ω C72-1 (PESE) - C71-164 (PESE) Always Below 1 Ω C72-2 (E2) - C71-163 (ESPE) Always Below 1 Ω C72-3 (VC) or C71-128 (VSPE) - Body ground and other terminals Always 10 kΩ or higher C72-1 (PESE) or C71-164 (PESE) - Body ground and other terminals Always 10 kΩ or higher C72-2 (E2) or C71-163 (ESPE) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Replace the differential pressure sensor.
Start the engine and allow it to idle until the engine coolant temperature reaches 75°C (167°F) or higher.
Idle the engine for 7 minutes.
With the vehicle stationary, depress the accelerator pedal and maintain 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
| *a | Front view of wire harness connector
(to Mass Air Flow Meter Sub-assembly) |
Disconnect the mass air flow meter sub-assembly connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition C17-3 (VCC) - C17-2 (E2G) Ignition switch ON 4.5 to 5.5 V C17-1 (FG) - C17-2 (E2G) Ignition switch ON 4.5 to 5.5 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 C17-3 (VCC) - C17-1 (FG) Ignition switch off 2.09 to 2.31 kΩ C17-2 (E2G) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the mass air flow meter sub-assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C17-3 (VCC) - C71-137 (VCVG) Always Below 1 Ω C17-1 (FG) - C71-135 (VG) Always Below 1 Ω C17-2 (E2G) - C71-136 (E2G) Always Below 1 Ω C17-3 (VCC) or C71-137 (VCVG) - Body ground and other terminals Always 10 kΩ or higher C17-1 (FG) or C71-135 (VG) - Body ground and other terminals Always 10 kΩ or higher C17-2 (E2G) or C71-136 (E2G) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG