- DTC judgment completed
- System normal
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000255S2 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P008700; Fuel Rail / System Pressure - Too Low; 2023 - 2025 MY GR Corolla [09/2022 - ] | ||
|
DTC |
P008700 |
Fuel Rail / System Pressure - Too Low |
DESCRIPTION
The high-pressure direct injection fuel system consists of a spill control valve, check valve, fuel relief valve, fuel pressure sensor (for high pressure side), fuel pump assembly (for high pressure side) and direct fuel injector assemblies. The spill control valve adjusts the return volume of high-pressure fuel. The check valve mechanically opens and closes the path to the fuel delivery pipe. 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 and operated by a cam installed to 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 4 and 26 MPa (40.8 and 265.1 kgf/cm2, 580 and 3770 psi) and monitors signals from the fuel pressure sensor (for high pressure side) to maintain the target fuel pressure.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Note |
|---|---|---|---|---|---|
|
P008700 |
Fuel Rail / System Pressure - Too Low |
Either of the following conditions is met (1 trip detection logic):
|
|
Comes on |
SAE Code: P0087 |
MONITOR DESCRIPTION
If the fuel pressure (for high pressure side) 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
|
Related DTCs |
P0087: Fuel pressure too low |
|
Required Sensors/Components (Main) |
Fuel pressure sensor (for high pressure side) |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Continuous |
|
Duration |
About 10 seconds |
|
MIL Operation |
Immediate |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Fuel pressure sensor (for high pressure side) malfunction (P0192, P0193) |
Not detected |
|
High pressure fuel pump malfunction (P1235) |
Not detected |
|
Fuel injector driver malfunction (P0201, P0202, P0203, P062D) |
Not detected |
|
Time after engine start |
0.2 seconds or more |
TYPICAL MALFUNCTION THRESHOLDS
|
When Using Direct Injection |
- |
|
Duration that both of the following conditions (a) and (b) are met |
10 seconds or more |
|
(a) Difference in fuel pressure between actual and target |
Less than -5 MPa (-51.0 kgf/cm2, -725 psi) |
|
(b) Actual discharge rate of high pressure fuel pump |
325 mm3/st or more |
|
When Using Only Port Injection |
- |
|
Duration that both of the following conditions (a) and (b) are met |
15 seconds or more |
|
(a) Difference in fuel pressure between actual and target |
Less than -2 MPa (-20.4 kgf/cm2, -290 psi) |
|
(b) Actual discharge rate of high pressure fuel pump |
125 mm3/st or more |
CONFIRMATION DRIVING PATTERN
HINT:
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
![2023 - 2025 MY GR Corolla [09/2022 - ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
- Permanent misfire and fuel system DTCs can only be cleared when performing the universal trip driving pattern when no malfunction is detected.
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON.
- Turn the GTS on.
- Record the Freeze Frame Data.
- 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.
- Turn GTS on.
- Based on the engine speed, engine load, injection mode 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.
GTS Display
Description
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
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 FUEL LEAK |
(a) Check around and beneath the vehicle for fuel leaks, fumes, etc.
OK:
No fuel leaks present.
| NG |
|
REPAIR OR REPLACE FUEL LEAK POINT |
|
|
2. |
CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P008700) |
(a) Read the DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
P008700 is output |
A |
|
P008700 and other DTCs are output |
B |
HINT:
If any DTCs other than P008700 are output, troubleshoot those DTCs first.
| B |
|
GO TO DTC CHART |
|
|
3. |
CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST |
(a) Has the vehicle run out of fuel in the past?
| YES |
|
DTC CAUSED BY RUNNING OUT OF FUEL |
|
|
4. |
CHECK MISFIRE COUNT OF DIRECT INJECTION |
(a) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
(b) Enter the following menus.
Powertrain > Engine > Active Test
|
Active Test Display |
|---|
|
Control the Injection Mode |
|
Data List Display |
|---|
|
Injection Mode |
|
Misfire Count Cylinder #1 |
|
Misfire Count Cylinder #2 |
|
Misfire Count Cylinder #3 |
(c) According to the display on the GTS, read the Data List with the Active Test "Control the Injection Mode" set to Direct.
|
Injection Mode |
Misfire Count |
Proceed to |
|---|---|---|
|
Direct |
No misfire counts, or misfire counts occur randomly in all cylinders |
A |
|
Misfire counts occur in a particular cylinder |
B |
HINT:
Perform "Inspection After Repair" after replacing the direct fuel injector assembly.
Click here
| B |
|
REPLACE DIRECT FUEL INJECTOR ASSEMBLY
|
|
|
5. |
INSPECT FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE) |
(a) Enter the following menus.
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Fuel Pressure (High) |
(b) Start the engine.
(c) Check that the fuel pressure fluctuates when the engine condition changes from idling to racing.
|
Result |
Proceed to |
|---|---|
|
Fuel pressure does not rise |
A |
|
Fuel pressure does not fluctuate |
B |
|
Fuel pressure fluctuates |
C |
HINT:
Perform "Inspection After Repair" after replacing the fuel pressure sensor (for high pressure side).
Click here
| B |
|
REPLACE FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE)
|
| C |
|
|
|
6. |
CHECK FUEL PUMP OPERATION (FOR LOW PRESSURE SIDE) |
Click here
HINT:
Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).
Click here
| NG |
|
|
|
7. |
CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE) |
Click here
| NG |
|
REPAIR OR REPLACE FUEL SYSTEM |
|
|
8. |
REPLACE FUEL PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE) |
Click here
HINT:
Perform "Inspection After Repair" after replacing the fuel pump assembly (for high pressure side).
Click here
|
|
9. |
CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(b) Turn the ignition switch off and wait for at least 30 seconds.
|
|
10. |
CHECK IF DTC OUTPUT RECURS (SEE IF DTC P008700 IS OUTPUT AGAIN) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Read the DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
P008700 is output |
B |
| A |
|
END |
| B |
|
REPLACE ECM
|
|
|