RM35X0E _51 Engine / Hybrid System _078720 7GR-FKS ENGINE CONTROL _0381907 SFI SYSTEM C

7GR-FKS ENGINE CONTROL  SFI SYSTEM  P008B00  Low Pressure Fuel System Pressure - Too High  


DESCRIPTION

Refer to DTC P008A00.

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>SFI SYSTEM>P008A00

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P008B00 Low Pressure Fuel System Pressure - Too High Actual fuel pressure (for low pressure side) value higher than target fuel pressure (for low pressure side) by threshold or more (1 trip detection logic).
·

Fuel pump control ECU

·

Fuel pressure sensor (for low pressure side)

·

ECM


Does not come on DTC stored SAE Code: P008B

MONITOR DESCRIPTION

If the fuel pressure (for low pressure side) increases despite a decrease request signal being sent to the fuel pump control ECU by the ECM, the ECM will store this DTC.

MONITOR STRATEGY

Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

A333609E40
4.781,0.917 5.031,0.5 5.031,0.5 5.198,0.5 false 5.26,0.417 6.688,0.76 1.427,0.344 10 false There is no designated vehicle speed 0.896,0.521 1.875,0.729 0.979,0.208 10 false Vehicle Speed 1.479,2.177 1.906,2.438 0.427,0.26 10 false Idling 0.708,2.49 1.927,3 1.219,0.51 10 false Ignition Switch ON 2.594,3.01 3.406,3.375 0.813,0.365 10 false Warming up 3.823,3.031 5.052,3.25 1.229,0.219 10 false 15 minutes or more 2.219,2.344 2.677,2.542 0.458,0.198 10 false [A] 2.927,2.063 3.385,2.26 0.458,0.198 10 false [B] 4.313,0.688 4.771,0.885 0.458,0.198 10 false [C] 5.323,3.427 5.781,3.625 0.458,0.198 10 false [D]

1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON.

3.

Turn the GTS on.

4.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

5.

Turn the ignition switch off and wait for at least 30 seconds.

6.

Turn the ignition switch to ON [A].

7.

Turn the GTS on.

8.

Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].

9.

Drive the vehicle for 15 minutes or more [C].

CAUTION:

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


10.

Enter the following menus: Powertrain / Engine / Trouble Codes [D].

11.

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.



12.

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

13.

Input the DTC: P008B00.

14.

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.




CAUTION / NOTICE / HINT

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

1.CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P008B00)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Engine / Trouble Codes.


e.

Read the DTCs.

Powertrain > Engine > Trouble Codes
50001 372
Result:
Result Proceed to
DTC P008B00 is output A
DTC P008B00 and other DTCs are output B


HINT:

If any DTCs other than P008B00 are output, troubleshoot those DTCs first.




A

2.READ VALUE USING GTS (Fuel Pressure (Low) / Fuel Pressure 2)

B

GO TO DTC CHART

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>SFI SYSTEM>DIAGNOSTIC TROUBLE CODE CHART


2.READ VALUE USING GTS (Fuel Pressure (Low) / Fuel Pressure 2)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Start the engine.


e.

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
50003 372 267

f.

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


g.

Turn the ignition switch off.


h.

Discharge the fuel pressure.

HINT:

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


i.

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


ii.

Start the engine.


iii.

After the engine has stopped on its own, turn the ignition 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.



iv.

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


v.

Install the EFI-MAIN NO. 2 fuse.



i.

Turn the ignition switch to ON.


j.

Turn the GTS on.


k.

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
50003 372 267

l.

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 GTS.

Result:
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 fuel pressure sensor (for low pressure side).

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION




A

3.PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP DUTY RATIO)

B

REPLACE FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY (FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE))

Click hereEngine / Hybrid System>7GR-FKS (FUEL)>FUEL PRESSURE SENSOR>REMOVAL


3.PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP DUTY RATIO)
a.

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

Click hereEngine / Hybrid System>7GR-FKS (FUEL)>FUEL SYSTEM>ON-VEHICLE INSPECTION


b.

Connect the GTS to the DLC3.


c.

Turn the ignition switch to ON.


d.

Turn the GTS 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
50004 372 39 267

f.

Compare the values in the Data List using the GTS and the fuel pressure gauge when the Active Test was performed.

Standard:
GTS 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 fuel pressure sensor (for low pressure side).

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION



Result:
Proceed to
OK
NG



OK

4.PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP DUTY RATIO)

NG

REPLACE FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY (FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE))

Click hereEngine / Hybrid System>7GR-FKS (FUEL)>FUEL PRESSURE SENSOR>REMOVAL


4.PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP DUTY RATIO)
a.

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

Click hereEngine / Hybrid System>7GR-FKS (FUEL)>FUEL SYSTEM>ON-VEHICLE INSPECTION


b.

Connect the GTS to the DLC3.


c.

Turn the ignition switch to ON.


d.

Turn the GTS 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
50004 372 39 267

f.

Read the values on the Data List and the fuel pressure gauge when the Active Test was performed.

Result:
GTS Operation Fuel Pressure (Low) / Fuel Pressure 2 Fuel pressure gauge Proceed to
Low Below 600 kPag Below 600 kPa (6.1 kgf/cm2, 87 psi) A
600 kPag or higher 600 kPa (6.1 kgf/cm2, 87 psi) or higher B




A

5.CLEAR DTC

B

REPLACE FUEL PUMP CONTROL ECU

Click hereEngine / Hybrid System>7GR-FKS (FUEL)>FUEL PUMP ECU>REMOVAL


5.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Clear the DTC.

Powertrain > Engine > Clear DTCs
50002 372

e.

Turn the ignition switch off and wait for at least 30 seconds.


Result:
Proceed to
NEXT



NEXT

6.CHECK WHETHER DTC OUTPUT RECURS (DTC P008B00)
6.CHECK WHETHER DTC OUTPUT RECURS (DTC P008B00)
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
50005 372 20

c.

Input the DTC: P008B00.


d.

Check the DTC judgment result.

Result:
Result Proceed to
NORMAL
(DTCs are not output) 		A
ABNORMAL
(DTC P008B00 is output) 		B




A

CHECK FOR INTERMITTENT PROBLEMS

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>SFI SYSTEM>CHECK FOR INTERMITTENT PROBLEMS


B

REPLACE ECM

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>ECM>REMOVAL