NR Series ENGINE CONTROL SFI SYSTEM P023400 Turbocharger/Supercharger "A" Overboost Condition
DESCRIPTION
Refer to DTC P003312.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P023400 | Turbocharger/Supercharger "A" Overboost Condition | Either of the following conditions is met (1 trip detection logic):
·
Boost pressure exceeds the threshold value (calculated from turbocharger speed upper limit value). ·
Boost pressure exceeds the threshold value (calculated from compressor downstream temperature upper limit value). |
·
Turbocharger sub-assembly ·
Vacuum regulating valve assembly ·
No. 1 turbo pressure sensor ·
Mass air flow meter sub-assembly ·
Wire harness or connector ·
ECM |
Does not come on | DTC stored | SAE Code: P0234 |
MONITOR DESCRIPTION
If the boost pressure exceeds the threshold value (calculated from turbocharger speed upper limit value or compressor downstream temperature upper limit value), there may be a malfunction in the turbocharger system. In this case, the ECM stores this DTC.
CONFIRMATION DRIVING PATTERN
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).
Turn the ignition switch off and wait for at least 30 seconds.
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].
Turn the GTS on.
Accelerate to 50 km/h (31 mph) or more with the accelerator pedal fully depressed [B].
- CAUTION:
-
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
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: P023400.
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 shows NORMAL, the system is normal.
·If the judgment result shows ABNORMAL, the system has a malfunction.
·If the judgment result shows INCOMPLETE, perform steps [B] through [C] again.
WIRING DIAGRAM
Refer to DTC P010012 for the mass air flow meter sub-assembly circuit.
Refer to DTC P011011 for intake air temperature sensor (mass air flow meter sub-assembly) circuit.
Refer to DTC P023511 for No. 1 turbo pressure sensor circuit.
Refer to DTC P024313 for vacuum regulating valve assembly circuit.
CAUTION / NOTICE / HINT
- NOTICE:
-
Inspect the fuses for circuits related to this system before performing the following procedure.
- 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
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.
Read the DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTC P023400 is output A DTC P023400 and other DTCs are output B
- HINT:
-
If any DTCs other than P023400 are output, troubleshoot those DTCs first.
A
B
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Atmospheric Pressure.
- Powertrain > Engine > Data List
-
Tester Display Atmospheric Pressure - 50003 372 229
Using the following table, determine the normal atmospheric pressure for the current altitude and temperature.
- HINT:
- ·
Standard atmospheric pressure is approximately 101 kPa(abs) (15 psi(abs)).
·For every 100 m (328 ft.) increase in altitude, atmospheric pressure drops by approximately 1 kPa (0.15 psi). This varies depending on the weather.
Compare the value of Atmospheric Pressure with the normal atmospheric pressure in the table.
- Result:
Result Proceed to Other than below A Difference between value of Atmospheric Pressure and normal atmospheric pressure is 10 kPa (1.45 psi) or higher. B
A
B
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Intake Air Temperature.
- Powertrain > Engine > Data List
-
Tester Display Intake Air Temperature - 50003 372 214
According to the display on the GTS, read the Data List.
- Result:
Result Proceed to Other than below A Difference between value of Intake Air Temperature and actual ambient air temperature is 10°C (18°F) or higher B
A
B
Inspect the mass air flow meter sub-assembly, referring to On-vehicle Inspection for Mass Air Flow Meter.
Inspect the mass air flow meter sub-assembly, referring to Inspection for Mass Air Flow Meter.
Inspect the operation of the mass air flow meter sub-assembly.
Connect the GTS to the DLC3.
Start the engine.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Mass Air Flow Sensor and Coolant Temperature.
- Powertrain > Engine > Data List
-
Tester Display Engine Speed Mass Air Flow Sensor Coolant Temperature - 50003 372 211,215,205
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.
- Standard:
GTS Display Condition Specified Condition Mass Air Flow Sensor ·Shift lever position: P
·A/C: Off
·Engine warmed up
·Engine Speed: 3000 rpm
Between 4.0 and 14.0 gm/sec
- Result:
Proceed to OK NG
OK
NG
Inspect the No. 1 turbo pressure sensor.
- Result:
Proceed to OK NG
OK
NG
Inspect the vacuum regulating valve assembly.
- Result:
Proceed to OK NG
OK
NG
Inspect the waste gate valve.
- Result:
Proceed to OK NG
OK
NG
Inspect the waste gate valve actuator.
- Result:
Proceed to OK NG
OK
NG
Disconnect the vacuum regulating valve 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 C98-1 (+) - C78-37 (WGV+) Always Below 1 Ω C98-2 (-) - C78-36 (WGV-) Always Below 1 Ω C98-1 (+) or C78-37 (WGV+) - Body ground and other terminals Always 10 kΩ or higher C98-2 (-) or C78-36 (WGV-) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
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 Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Powertrain > Engine > Utility
-
Tester Display All Readiness - 50005 372 20
Input the DTC: P023400.
Check the DTC judgment result.
- Result:
Result Proceed to NORMAL
(DTCs are not output)A ABNORMAL
(DTC P023400 is output)B
A
B
| *a | Front view of wire harness connector
(to No. 1 Turbo Pressure Sensor) |
Disconnect the No. 1 turbo pressure sensor 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 C23-3 (VC) - C23-2 (E2) Ignition switch ON 4.75 to 5.25 V C23-1 (PIM) - C23-2 (E2) Ignition switch ON 3.0 to 5.25 V
- Result:
Proceed to OK NG
OK
NG
Disconnect the No. 1 turbo 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 C23-3 (VC) - C78-140 (VPTA) Always Below 1 Ω C23-2 (E2) - C78-139 (EPTA) Always Below 1 Ω C23-1 (PIM) - C78-108 (PTA) Always Below 1 Ω C23-3 (VC) or C78-140 (VPTA) - Body ground and other terminals Always 10 kΩ or higher C23-1 (PIM) or C78-108 (PTA) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
| *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 Condition Specified Condition C25-1 (+B) - Body ground Ignition switch ON 11 to 14 V
- 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 C25-3 (VG) - C78-92 (VG) Always Below 1 Ω C25-2 (E2G) - C78-91 (E2G) Always Below 1 Ω C25-3 (VG) or C78-92 (VG) - Body ground and other terminals Always 10 kΩ or higher
- HINT:
-
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.
- Result:
Proceed to OK NG
OK
NG
Inspect the intake air temperature sensor.
- HINT:
-
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.
- Result:
Proceed to OK NG
OK
NG
Disconnect the intake air temperature 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 C25-4 (THA) - C78-94 (THA) Always Below 1 Ω C25-5 (E2) - C78-93 (ETHA) Always Below 1 Ω C25-4 (THA) or C78-94 (THA) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG