Lexus ES: Fuel Rail Pressure Sensor "A" Signal Stuck in Range (P01902A,P019064)
DESCRIPTION
Refer to DTC P019011.
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| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P01902A | Fuel Rail Pressure Sensor "A" Signal Stuck in Range | When target high pressure side fuel pressure changes, the change in fuel pressure sensor value is abnormal (2 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0191 |
| P019064 | Fuel Rail Pressure Sensor "A" Signal Plausibility Failure | Although engine has been stopped and left as is for a long time, high pressure side fuel pressure is higher or lower than threshold (2 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0191 |
MONITOR DESCRIPTION
Fuel Pressure Sensor Stuck MonitorIf the fuel pressure sensor (for high pressure side) value does not follow the change in the target high pressure side fuel pressure, it is judged as a malfunction. If this malfunction is detected in 2 consecutive driving cycles, the ECM will illuminate the MIL and store DTC P01902A.
Fuel Pressure Sensor Correlation Monitor with Barometric PressureIf the fuel pressure sensor (for high pressure side) value is less than or higher than the threshold value when a cold start is performed after the engine has been warmed up and then stopped, it is judged as a malfunction has occurred. If this malfunction is detected for 2 consecutive driving cycles, the ECM will illuminate the MIL and store DTC P019064.
MONITOR STRATEGY
| Related DTCs | P0191: Fuel pressure sensor rationality (stuck monitor) P0191: Fuel pressure sensor rationality (correlation monitor with barometric pressure) |
| Required Sensors/Components (Main) | Fuel pressure sensor (for high pressure side) |
| Required Sensors/Components (Related) | Atmospheric pressure sensor (ECM) |
| Frequency of Operation | Continuous |
| Duration | Within 30 seconds: Stuck monitor Within 10 seconds: Correlation monitor with barometric pressure |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
Stuck Monitor| All of the following conditions are met | - |
| Fuel pressure sensor (for high pressure side) circuit malfunction (P0192, P0193) | Not detected |
| High pressure fuel pump malfunction (P1235) | Not detected |
| Engine coolant temperature sensor malfunction (P0117, P0118) | Not detected |
| Barometric pressure sensor malfunction (P106C, P2228, P2229) | Not detected |
| Auxiliary battery voltage | 11 V or higher |
| Fuel cut | Off |
| Injection mode | NOT PFI (Port fuel injection) |
| All of the following conditions are met | - |
| Fuel pressure sensor (for high pressure side) circuit malfunction (P0192, P0193) | Not detected |
| High pressure fuel pump malfunction (P1235) | Not detected |
| Engine coolant temperature sensor malfunction (P0117, P0118) | Not detected |
| Barometric pressure sensor malfunction (P106C, P2228, P2229) | Not detected |
| Soak timer malfunction (P2610) | Not detected |
| Auxiliary battery voltage | 8 V or higher |
| Power switch | Off |
| Soak time | 5, 7 or 9.5 hours |
| Atmospheric pressure | 76 kPa(abs) [11 psi(abs)] or higher |
TYPICAL MALFUNCTION THRESHOLDS
Stuck Monitor| Malfunction counter | 5 times or more |
| Fuel pressure sensor (for high pressure side) output deviation | Less than 0.3 MPa (3.1 kgf/cm2, 43.5 psi) |
| Malfunction counter | 5 seconds or more |
| Fuel pressure sensor (for high pressure side) output | Less than -1.881 MPa (-19.18 kgf/cm2, -272.8 psi), or higher than 2.543 MPa (25.93 kgf/cm2, 368.8 psi) |
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.
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-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for at least 30 seconds.
- Turn the power switch on (IG) [A].
- Turn the Techstream on.
-
Put the engine in Inspection Mode (Maintenance Mode).
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- Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
-
With the engine running, drive the vehicle for 15 minutes or more [C].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
If the engine stops, further depress the accelerator pedal to restart the engine.
- Turn the power switch off.
- With the engine stopped, leave the vehicle as is for 5 hours or more [D].
- Turn the power switch on (IG) [E].
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Trouble Codes [F].
-
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: P01902A or P019064.
-
Check the DTC judgment result.
Techstream 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 [F] again.
-
[A] to [F]: 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 P019011.
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CAUTION / NOTICE / HINT
NOTICE:
-
Vehicle Control History may be stored in the hybrid vehicle control ECU assembly 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.
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(Select Powertrain in Health Check and then check the time stamp data.)
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-
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, 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.
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HINT:
Read Freeze Frame Data using the Techstream. 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
| 1. | CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P01902A OR P019064) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTC P01902A or P019064 is output | A |
| DTC P01902A or P019064 and P008700, P008800, P017100 or P017200 are output | |
| DTC P01902A or P019064 and other DTCs are output | B |
HINT:
- If DTC P01902A or P019064 and P008700, P008800, P017100 or P017200 are output simultaneously, troubleshoot for DTC P01902A or P019064 first.
- If any DTCs other than P01902A or P019064 are output, troubleshoot those DTCs first.
| B | .gif) | GO TO DTC CHART |
|
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| 2. | CHECK FUEL LEAK |
(a) Check around and beneath the vehicle for fuel leaks, fumes, etc.
OK:
No fuel leaks present.
| NG | | GO TO STEP 11 |
|
| 3. | PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE TARGET FUEL PRESSURE OFFSET) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility| Tester Display |
|---|
| Inspection Mode |
(e) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
(f) Enter the following menus: Powertrain / Engine / Active Test / Control the Target Fuel Pressure Offset / Data List / Coolant Temperature and High Fuel Pressure Sensor.
Powertrain > Engine > Active Test| Active Test Display |
|---|
| Control the Target Fuel Pressure Offset |
| Data List Display |
|---|
| Coolant Temperature |
| High Fuel Pressure Sensor |
(g) Check the value of the Data List item "High Fuel Pressure Sensor" when the target fuel pressure is increased and decreased using the Active Test.
| Result | Proceed to |
|---|---|
| "High Fuel Pressure Sensor" value follows the change in target fuel pressure | A |
| "High Fuel Pressure Sensor" value does not follow the change in target fuel pressure | B |
| B | | GO TO STEP 10 |
|
| 4. | CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE) - ECM) |
(a) Disconnect the fuel pressure sensor (for high pressure side) connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| F2-3 (PR) - C88-97 (PR) | Always | Below 1 Ω |
| F2-2 (E2) - C88-96 (EPR) | Always | Below 1 Ω |
| F2-3 (PR) or C88-97 (PR) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | | GO TO STEP 8 |
|
| 5. | REPLACE FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE) |
(a) Replace the fuel pressure sensor (for high pressure side).
Click here
HINT:
Perform "Inspection After Repair" after replacing the fuel pressure sensor (for high pressure side).
Click here
|
| 6. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs(e) Turn the power switch off and wait for at least 30 seconds.
|
| 7. | CHECK WHETHER DTC OUTPUT RECURS (DTC P01902A OR P019064) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Trouble Codes.
(c) Read the pending DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTC P01902A or P019064 is output | B |
| A | | END |
| B | | GO TO STEP 9 |
| 8. | REPAIR OR REPLACE HARNESS OR CONNECTOR |
(a) Repair or replace the wire harness or connector.
| NEXT | | GO TO STEP 12 |
| 9. | REPLACE ECM |
(a) Replace the ECM.
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| NEXT | | GO TO STEP 12 |
| 10. | REPLACE FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE) |
(a) Replace the fuel pressure sensor (for high pressure side).
Click here
HINT:
Perform "Inspection After Repair" after replacing the fuel pressure sensor (for high pressure side).
Click here
| NEXT | | GO TO STEP 12 |
| 11. | REPAIR OR REPLACE FUEL LEAK POINT |
(a) Repair or replace the fuel leak point.
|
| 12. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs(e) Turn the power switch off and wait for at least 30 seconds.
|
| 13. | CHECK WHETHER DTC OUTPUT RECURS (DTC P01902A OR P019064) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Trouble Codes.
(c) Read the pending DTCs.
Powertrain > Engine > Trouble CodesOK:
DTCs are not output.
| NEXT | | END |
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