2GR-FKS (ENGINE CONTROL): SFI SYSTEM: P008700; Fuel Rail / System Pressure - Too Low; 2018 MY Camry [06/2017

The high-pressure direct injection fuel system consists of a spill control valve, check valve, fuel relief valve, fuel pressure sensor, fuel pump assembly (for high pressure side) and fuel injector assemblies (for direct injection). The spill control valve adjusts the return volume of high-pressure fuel. The check valve mechanically opens and closes the paths to the fuel delivery pipes. The relief valve releases the fuel back to the fuel tank if there is a malfunction in the high-pressure fuel system. The fuel pump assembly (for high pressure side) is installed to the cylinder head cover (bank 1) and operated by a cam installed to the end of the exhaust camshaft.

Rotation of the camshaft moves the pump plunger inside the fuel pump assembly (for high pressure side) up and down, pressurizing the fuel. The pressurized fuel opens the check valve and is pumped into the fuel delivery pipe. The ECM controls the spill control valve to adjust the fuel pressure between 2 and 25 MPa (20 and 255 kgf/cm²) and monitors signals from the fuel pressure sensor (for high pressure side) to maintain the target fuel pressure.

MONITOR DESCRIPTION

If the fuel pressure decreases despite an increase request signal being sent to the fuel pump assembly (for high pressure side) by the ECM, the ECM will illuminate the MIL and store this DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

CONFIRMATION DRIVING PATTERN

HINT:

When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
Permanent misfire and fuel system DTCs can only be cleared when performing the universal trip driving pattern when no malfunction is detected.

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Record the Freeze Frame Data.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for at least 30 seconds.
Start the engine.
Turn Techstream on.
Based on the engine speed, engine load and other conditions displayed in the freeze frame data, reproduce the conditions present when the DTC was stored.
Enter the following menus: Powertrain / Engine / Trouble Codes.
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: P008700.

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.

CAUTION / NOTICE / 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

Powertrain > Engine > Trouble Codes

(d) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored.

Powertrain > Engine > DTC(P008700) > Freeze Frame Data

HINT:

Check the freeze frame data sets recorded the moment the DTC was stored and after the DTC was stored.
Using the freeze frame data, confirm the vehicle conditions when the DTC was stored, such as if the engine was idling with the shift state P, D or N or if the vehicle was being driven at a constant speed or accelerating.

(e) Compare the difference in pressure between "Target Fuel Pressure (Low) / Target Fuel Pressure 2 and Low Fuel Pressure Sensor".

(b) Start the engine and warm it up until the engine coolant temperature reaches 80°C (176°F) or higher.

(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Direct / Data List / Coolant Temperature, Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #6.

Powertrain > Engine > Active Test

(e) According to the display on the Techstream, read the Data List with the Active Test "Control the Injection Mode" set to Direct.

Perform "Inspection After Repair" after replacing the fuel injector assembly (for direct injection).

(d) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (High).

Powertrain > Engine > Data List

(f) Check that the fuel pressure fluctuates when the engine condition changes from idling to racing.

Perform "Inspection After Repair" after replacing the fuel pressure sensor (for high pressure side).

(d) In accordance with the display on the Techstream, check the value of Freeze Frame Data item "Fuel Remaining Volume" stored when the DTC was detected.

Powertrain > Engine > DTC(P008700) > Freeze Frame Data

HINT:

DTC P008700 may be stored if the vehicle temporarily ran out of fuel when the amount of fuel was low.
If Freeze Frame Data item "Fuel Remaining Volume" is not displayed, based on the interview with the customer, check if the low fuel level warning was not displayed when the MIL illuminated.

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

Powertrain > Engine > Clear DTCs

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