Lexus ES: Fuel Rail Pressure Sensor (Low) Signal Stuck in Range (P107A2A,P107A64)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / A25a-fxs (engine Control) / Sfi System / Fuel Rail Pressure Sensor (Low) Signal Stuck in Range (P107A2A,P107A64)

DESCRIPTION

Refer to DTC P107A11.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P107A2A	Fuel Rail Pressure Sensor (Low) Signal Stuck in Range	When the target fuel pressure for the low pressure side changes, the change in the No. 2 fuel pressure sensor (for low pressure side) value is abnormal (2 trip detection logic).	Leak of fuel Fuel pump control ECU No. 2 fuel pressure sensor (for low pressure side) Fuel pump (for low pressure side) Fuel main valve assembly (for high pressure) ECM	Comes on	DTC stored	SAE Code: P107B
P107A64	Fuel Rail Pressure Sensor (Low) Signal Plausibility Failure	When the fuel pump on the low pressure side is operated at maximum speed when the engine is stopped at vehicle speed of 45 km/h (28 mph) or more, the low pressure side fuel pressure is higher or lower than threshold (2 trip detection logic).	Leak of fuel Fuel pump control ECU No. 2 fuel pressure sensor (for low pressure side) Fuel pump (for low pressure side) Fuel main valve assembly (for high pressure) ECM	Comes on	DTC stored	SAE Code: P107B

MONITOR DESCRIPTION

Fuel Pressure Sensor Stuck Monitor

If the No. 2 fuel pressure sensor (for low pressure side) value does not follow the change in the target low 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 P107A2A.

Fuel Pressure Sensor Correlation Monitor

If the No. 2 fuel pressure sensor (for low pressure side) value is less than or higher than the threshold value when the fuel pump on the low pressure side is operated at maximum speed when the engine is stopped at vehicle speed of 45 km/h (28 mph) or more, 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 P107A64.

MONITOR STRATEGY

Related DTCs	P107B: Fuel pressure sensor rationality (stuck monitor) P107B: Fuel pressure sensor rationality (correlation monitor)
Required Sensors/Components (Main)	No. 2 fuel pressure sensor (for low pressure side)
Required Sensors/Components (Related)	Atmospheric pressure sensor
Frequency of Operation	Continuous: Stuck monitor Once per driving cycle: Correlation monitor
Duration	Less than 30 seconds: Stuck monitor Less than 10 seconds: Correlation monitor
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Stuck Monitor

All of the following conditions are met	2 seconds or more
Engine coolant temperature sensor malfunction (P0116, P0117, P0118)	Not detected
Intake air temperature sensor malfunction (P0111, P0112, P0113)	Not detected
Fuel pressure sensor (for low pressure side) circuit malfunction (P107C, P107D)	Not detected
Auxiliary battery voltage	11 V or higher
Fuel cut	Off

Correlation Monitor

All of the following conditions are met	-
Engine coolant temperature sensor malfunction (P0116, P0117, P0118)	Not detected
Intake air temperature sensor malfunction (P0111, P0112, P0113)	Not detected
Fuel pressure sensor (for low pressure side) circuit malfunction (P107C, P107D)	Not detected
Auxiliary battery voltage	11 V or higher
Engine coolant temperature	75°C (167°F) or higher
Intake air temperature	-10°C (14°F) or higher
Atmospheric pressure	76 kPa(abs) [11 psi(abs)] or higher
Fuel pump (for low pressure) operation at maximum duty	1 second or more
Engine shut off	Executing
Vehicle Speed	45 km/h (28 mph) or more

TYPICAL MALFUNCTION THRESHOLDS

Stuck Monitor

Malfunction counter	3 times or more
Malfunction counter is incremented when fuel pressure sensor (for low pressure side) output deviation	Less than 12 kPa (0.1 kgf/cm2, 1.7 psi)

Correlation Monitor

Malfunction counter	2 seconds or more
Malfunction counter is counted when following condition is met	-
Fuel pressure sensor (for low pressure side) output	Higher than 770 kPa (7.9 kgf/cm2, 112 psi), or less than 540 kPa (5.5 kgf/cm2, 78.3 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.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

P107A2A

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).
Turn the Techstream on.
Put the engine in Inspection Mode (Maintenance Mode).
Click here
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
Turn the power switch off.
Turn the power switch on (READY) [A].
Turn the Techstream on.
Rev the engine for 15 seconds or more with the shift lever in P [B].
Allow the engine to stop for 5 seconds or more [C].
HINT:
- If the engine does not stop, wait till the engine stops.
- If the engine coolant temperature is low, it may take some time for the engine to stop.
Repeat [B] and [C] 5 times or more [D].
Enter the following menus: Powertrain / Engine / Trouble Codes [E].
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: P107A2A.

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 [E] again.
[A] to [E]: 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.

P107A64

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).
Turn the Techstream on.
Put the engine in Inspection Mode (Maintenance Mode).
Click here
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
Turn the power switch off [A].
Turn the power switch on (READY) [B].
Drive the vehicle at approximately 50 km/h (31 mph) for 15 seconds or more [C].
CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
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: P107A64.

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 [A] 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.

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.
Click here

(Select Powertrain in Health Check and then check the time stamp data.)

Click here
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.
Click here

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 P107A2A, P107A64, P008A00 OR P008B00)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs and record the Freeze Frame Data.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTC P107A2A is output	A
DTC P107A64 is output	B
DTC P107A2A or P107A64 and P008A00 are output	C
DTC P107A2A or P107A64 and P008B00 are output	D
DTC P107A2A, P107A64, P008A00 and/or P008B00 and other DTCs are output	E

HINT:

If any DTCs other than P107A2A, P107A64, P008A00 and/or P008B00 are output, troubleshoot those DTCs first.

GO TO STEP 6

GO TO STEP 7

GO TO STEP 16

GO TO DTC CHART

2.	READ VALUE USING TECHSTREAM (FUEL PRESSURE (LOW) / FUEL PRESSURE 2)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(e) Start the engine.

(f) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Data List

Tester Display
Fuel Pressure (Low) / Fuel Pressure 2

(g) Record the Fuel Pressure (Low) / Fuel Pressure 2 value.

(h) Turn the power switch off.

(i) Discharge the fuel pressure.

HINT:

DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

(1) Remove the EFI-MAIN NO. 2 fuse from the No. 1 engine room relay block and No. 1 junction block assembly.

(2) Turn the power switch on (IG).

(3) Turn the Techstream on.

(4) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(5) Start the engine.

(6) After the engine has stopped on its own, turn the power switch off.

HINT:

If the engine does not stop naturally, perform direct injection by racing the engine to reduce the fuel pressure [Fuel Pressure (High)] and stop the engine.

(7) Turn the power switch on (IG).

(8) Turn the Techstream on.

(9) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(10) Crank the engine again and make sure that the engine does not start.

(11) Install the EFI-MAIN NO. 2 fuse.

(j) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Data List

Tester Display
Fuel Pressure (Low) / Fuel Pressure 2

(k) Compare the Fuel Pressure (Low) / Fuel Pressure 2 value recorded with the engine running to the Fuel Pressure (Low) / Fuel Pressure 2 value currently shown on the Techstream.

Result	Proceed to
Fuel Pressure (Low) / Fuel Pressure 2 value drops	A
Fuel Pressure (Low) / Fuel Pressure 2 value does not fluctuate	B

HINT:

Perform "Inspection After Repair" after replacing the No. 2 fuel pressure sensor (for low pressure side).

Click here

REPLACE NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(e) Turn the power switch off and wait for at least 30 seconds.

4.	CHECK WHETHER DTC OUTPUT RECURS (DTC P107A2A OR P107A64)

(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(b) Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display
All Readiness

(d) Check the DTC judgment result.

Result	Proceed to
NORMAL (DTCs are not output)	A
ABNORMAL (DTC P107A2A or P107A64 is output)	B

Result

Proceed to

NORMAL

(DTCs are not output)

ABNORMAL

(DTC P107A2A or P107A64 is output)

CHECK FOR INTERMITTENT PROBLEMS

5.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY RATIO)

(a) Install the fuel pressure gauge (for low pressure line of low pressure side).

Click here

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty Ratio / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Active Test

Active Test Display
Control the Fuel Pump Duty Ratio

Data List Display
Fuel Pressure (Low) / Fuel Pressure 2

(f) Compare the values in the Data List using the Techstream and the fuel pressure gauge when the Active Test was performed.

Standard:

Techstream Operation	Standard
Low	Data List value and fuel pressure gauge are within +/-50 kPa of each other
High

HINT:

Perform "Inspection After Repair" after replacing the No .2 fuel pressure sensor (for low pressure side).

Click here

REPLACE ECM

REPLACE NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)

6.	READ FREEZE FRAME DATA (FUEL PRESSURE (LOW) / FUEL PRESSURE 2)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Read the Freeze Frame Data value from step 1.

Powertrain > Engine > DTC(P107A2A) > Freeze Frame Data

Tester Display
Fuel Pressure (Low) / Fuel Pressure 2

Result	Proceed to
Fuel Pressure (Low) / Fuel Pressure 2 value is 770 kPa or higher	A
Fuel Pressure (Low) / Fuel Pressure 2 value is 540 kPa or less	B

GO TO STEP 16

GO TO STEP 7

7.	CHECK FUEL LEAK

(a) Check around and beneath the vehicle for fuel leaks, fumes, etc.

OK:

No fuel leaks present.

REPAIR OR REPLACE FUEL LEAK POINT

8.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY RATIO)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty Ratio.

Powertrain > Engine > Active Test

Tester Display
Control the Fuel Pump Duty Ratio

(e) Check whether the fuel pump operating sound occurs when performing the Active Test on the Techstream.

Standard:

Techstream Operation	Standard
High	Operating sounds can be heard from fuel pump (for low pressure side)

HINT:

Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).

Click here

REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE)

9.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY RATIO)

(a) Discharge the fuel pressure.

HINT:

DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

(1) Remove the EFI-MAIN NO. 2 fuse from the No. 1 engine room relay block and No. 1 junction block assembly.

(2) Connect the Techstream to the DLC3.

(3) Turn the power switch on (IG).

(4) Turn the Techstream on.

(5) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(6) Start the engine.

(7) After the engine has stopped on its own, turn the power switch off.

HINT:

If the engine does not stop naturally, perform direct injection by racing the engine to reduce the fuel pressure [Fuel Pressure (High)] and stop the engine.

(8) Turn the power switch on (IG).

(9) Turn the Techstream on.

(10) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(11) Crank the engine again and make sure that the engine does not start.

(12) Install the EFI-MAIN NO. 2 fuse.

(b) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty Ratio / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Active Test

Active Test Display
Control the Fuel Pump Duty Ratio

Data List Display
Fuel Pressure (Low) / Fuel Pressure 2

Standard:

Techstream Operation	Standard
Low to High	When switching from Low to High, Fuel Pressure (Low) / Fuel Pressure 2 value changes

HINT:

Once the fuel pressure becomes high, the fuel pressure will not decrease, even when switched from High to Low. Therefore, make sure that the fuel pressure is low before checking that the fuel pressure changes when switching from Low to High.

GO TO STEP 15

10.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY RATIO)

(a) Discharge the fuel pressure.

HINT:

DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

(1) Remove the EFI-MAIN NO. 2 fuse from the No. 1 engine room relay block and No. 1 junction block assembly.

(2) Connect the Techstream to the DLC3.

(3) Turn the power switch on (IG).

(4) Turn the Techstream on.

(5) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(6) Start the engine.

(7) After the engine has stopped on its own, turn the power switch off.

HINT:

If the engine does not stop naturally, perform direct injection by racing the engine to reduce the fuel pressure [Fuel Pressure (High)] and stop the engine.

(8) Turn the power switch on (IG).

(9) Turn the Techstream on.

(10) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(11) Crank the engine again and make sure that the engine does not start.

(12) Install the EFI-MAIN NO. 2 fuse.

(b) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty Ratio / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Active Test

Active Test Display
Control the Fuel Pump Duty Ratio

Data List Display
Fuel Pressure (Low) / Fuel Pressure 2

Standard:

Techstream Operation	Fuel Pressure (Low) / Fuel Pressure 2
Low	50 kPa or higher
High	420 kPa or higher

HINT:

OK:

Actual Low and High values are as shown above.

GO TO STEP 14

11.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY RATIO)

(a) Install the fuel pressure gauge (for low pressure line of low pressure side).

Click here

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty Ratio / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Active Test

Active Test Display
Control the Fuel Pump Duty Ratio

Data List Display
Fuel Pressure (Low) / Fuel Pressure 2

(f) Compare the values in the Data List using the Techstream and the fuel pressure gauge when the Active Test was performed.

Standard:

Techstream Operation	Standard
Low	Data List value and fuel pressure gauge are within +/-50 kPa of each other
High

HINT:

Perform "Inspection After Repair" after replacing the No. 2 fuel pressure sensor (for low pressure side).

Click here

REPLACE NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)

12.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(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 P107A2A OR P107A64)

(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(b) Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display
All Readiness

(d) Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

ABNORMAL

(DTC P107A2A or P107A64 is output)

CHECK FOR INTERMITTENT PROBLEMS

REPLACE ECM

14.	READ VALUE USING TECHSTREAM (FUEL PRESSURE (LOW) / FUEL PRESSURE 2)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(e) Start the engine.

(f) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Data List

Tester Display
Fuel Pressure (Low) / Fuel Pressure 2

(g) Record the Fuel Pressure (Low) / Fuel Pressure 2 value.

(h) Turn the power switch off.

(i) Wait for 10 seconds.

(j) Turn the power switch on (IG).

(k) Turn the Techstream on.

(l) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Data List

Tester Display
Fuel Pressure (Low) / Fuel Pressure 2

(m) Compare the Fuel Pressure (Low) / Fuel Pressure 2 value recorded with the engine running to the Fuel Pressure (Low) / Fuel Pressure 2 value currently shown on the Techstream.

Result	Proceed to
Fuel Pressure (Low) / Fuel Pressure 2 value is maintained	A
Fuel Pressure (Low) / Fuel Pressure 2 value drops	B

HINT:

Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).

Click here

REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE)

REPLACE FUEL MAIN VALVE ASSEMBLY (FOR HIGH PRESSURE)

15.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY RATIO)

(a) Install the fuel pressure gauge (for low pressure line of low pressure side).

Click here

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty Ratio / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Active Test

Active Test Display
Control the Fuel Pump Duty Ratio

Data List Display
Fuel Pressure (Low) / Fuel Pressure 2

(f) Read the values in the Data List using the Techstream and the fuel pressure gauge when the Active Test was performed.

Techstream Operation	Result	Proceed to
Low to High	Data List value does not change, but fuel pressure gauge changes	A
Low to High	Data List value and fuel pressure gauge do not change	B

HINT:

Perform "Inspection After Repair" after replacing the No. 2 fuel pressure sensor (for low pressure side).

Click here

REPLACE NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)

REPLACE FUEL PUMP CONTROL ECU

16.	READ VALUE USING TECHSTREAM (FUEL PRESSURE (LOW) / FUEL PRESSURE 2)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(e) Start the engine.

(f) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Data List

Tester Display
Fuel Pressure (Low) / Fuel Pressure 2

(g) Record the Fuel Pressure (Low) / Fuel Pressure 2 value.

(h) Turn the power switch off.

(i) Discharge the fuel pressure.

HINT:

DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

(1) Remove the EFI-MAIN NO. 2 fuse from the No. 1 engine room relay block and No. 1 junction block assembly.

(2) Turn the power switch on (IG).

(3) Turn the Techstream on.

(4) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(5) Start the engine.

(6) After the engine has stopped on its own, turn the power switch off.

HINT:

If the engine does not stop naturally, perform direct injection by racing the engine to reduce the fuel pressure [Fuel Pressure (High)] and stop the engine.

(7) Turn the power switch on (IG).

(8) Turn the Techstream on.

(9) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(10) Crank the engine again and make sure that the engine does not start.

(11) Install the EFI-MAIN NO. 2 fuse.

(j) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Data List

Tester Display
Fuel Pressure (Low) / Fuel Pressure 2

(k) Compare the Fuel Pressure (Low) / Fuel Pressure 2 value recorded with the engine running to the Fuel Pressure (Low) / Fuel Pressure 2 value currently shown on the Techstream.

Result	Proceed to
Fuel Pressure (Low) / Fuel Pressure 2 value drops	A
Fuel Pressure (Low) / Fuel Pressure 2 value is maintained	B

HINT:

Perform "Inspection After Repair" after replacing the No. 2 fuel pressure sensor (for low pressure side).

Click here

REPLACE NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)

17.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY RATIO)

(a) Install the fuel pressure gauge (for low pressure line of low pressure side).

Click here

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty Ratio / Data List / Fuel Pressure (Low) / Fuel Pressure 2.

Powertrain > Engine > Active Test

Active Test Display
Control the Fuel Pump Duty Ratio

Data List Display
Fuel Pressure (Low) / Fuel Pressure 2

(f) Compare the values in the Data List using the Techstream and the fuel pressure gauge when the Active Test was performed.

Standard:

Techstream Operation	Standard
Low	Data List value and fuel pressure gauge are within +/-50 kPa of each other
High

HINT:

Perform "Inspection After Repair" after replacing the No. 2 fuel pressure sensor (for low pressure side).

Click here

REPLACE NO. 2 FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)

18.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(e) Turn the power switch off and wait for at least 30 seconds.

19.	CHECK WHETHER DTC OUTPUT RECURS (DTC P107A2A OR P107A64)

(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(b) Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display
All Readiness

(d) Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

ABNORMAL

(DTC P107A2A or P107A64 is output)

CHECK FOR INTERMITTENT PROBLEMS

REPLACE ECM

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Yaw Rate Sensor Circuit Voltage Out of Range (C00631C)

DESCRIPTION The airbag ECU assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition. The skid control ECU (brake actuator assembly) calibrates the sensitivity of the yaw rate sensor (airbag ECU assembly) based on signals from the steering angle sensor and speed sens

Evaporative Emission System Pressure / Intake Air Pressure Signal Compare Failure (P106A62,P106C62)

DESCRIPTION Those DTCs are designed to detect a deviation in the output characteristics of a pressure sensor. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P106A62 Evaporative Emission System Pressure / Intake Air Pressure Signal Compare Failure T

Lexus ES: Fuel Rail Pressure Sensor (Low) Signal Stuck in Range (P107A2A,P107A64)

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Control Module Internal Temperature Sensor/Intake Air Temperature Sensor Signal Compare Failure (P111C62)

Bank 1 Air-Fuel Ratio Imbalance (Port) (P11EA00,P11EC00-P11EF00,P219A00,P219C00-P219F00)

High Pressure Fuel Pump Circuit Open (P123513)

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Yaw Rate Sensor Circuit Voltage Out of Range (C00631C)

Evaporative Emission System Pressure / Intake Air Pressure Signal Compare Failure (P106A62,P106C62)