- Engine Speed
- Mass Air Flow Sensor
- Coolant Temperature
- Target Fuel Pressure (High)
- Fuel Pressure (High)
- High Fuel Pressure Sensor
- Injection Mode
- Injection Timing Cylinder #1 (D4)
- Injection Time Cylinder #1 (D4)
- Ignition Timing Cylinder #1
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM10000000255X2 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P128300-P128500; Cold Start Fuel Injection Control Performance #1; 2023 - 2025 MY GR Corolla [09/2022 - ] | ||
|
DTC |
P128300 |
Cold Start Fuel Injection Control Performance #1 |
|
DTC |
P128400 |
Cold Start Fuel Injection Control Performance #2 |
|
DTC |
P128500 |
Cold Start Fuel Injection Control Performance #3 |
DESCRIPTION
To improve emissions immediately after a cold start, cold start multi pulse fuel injection control is performed which divides a single pulse of the direct fuel injector into several smaller pulses.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Note |
|---|---|---|---|---|---|
|
P128300 |
Cold Start Fuel Injection Control Performance #1 |
Cold start multi pulse fuel injection control for the No. 1 cylinder is not performed (2 trip detection logic). |
|
Comes on |
SAE Code: P1283 |
|
P128400 |
Cold Start Fuel Injection Control Performance #2 |
Cold start multi pulse fuel injection control for the No. 2 cylinder is not performed (2 trip detection logic). |
|
Comes on |
SAE Code: P1284 |
|
P128500 |
Cold Start Fuel Injection Control Performance #3 |
Cold start multi pulse fuel injection control for the No. 3 cylinder is not performed (2 trip detection logic). |
|
Comes on |
SAE Code: P1285 |
Related Data List
|
DTC No. |
Data List |
|---|---|
|
P128300 |
|
|
P128400 |
|
|
P128500 |
MONITOR DESCRIPTION
While performing cold start multi pulse fuel injection control, the ECM monitors the direct fuel injector assemblies. When cold start multi pulse fuel injection control is being performed, the ECM counts the number of times that an injector does not pulse per cycle, and if the total number exceeds the threshold, the ECM determines that cold start multi pulse fuel injection control is malfunctioning and illuminates the MIL and stores a DTC.
MONITOR STRATEGY
|
Related DTCs |
P1283: Cold start fuel injection control performance #1 P1284: Cold start fuel injection control performance #2 P1285: Cold start fuel injection control performance #3 |
|
Required Sensors/Components (Main) |
Direct fuel injector assembly ECM (Injector driver) |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Once par driving cycle |
|
Duration |
10 seconds |
|
MIL Operation |
2 driving cycles |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever the following DTCs are not stored |
None |
|
All of the following conditions are met |
- |
|
Battery voltage |
11 V or higher |
|
Time after engine start |
3 seconds or more |
|
Starter |
Off |
|
Engine coolant temperature at engine start |
-10°C (14°F) or higher |
|
Engine coolant temperature |
-10°C (14°F) or higher, and less than 50°C (122°F) |
|
Engine idling time |
3 seconds or more |
|
Fuel-cut |
Off |
|
Vehicle speed |
Less than 3 km/h (1.875 mph) |
|
Atmospheric pressure |
76 kPa(abs) [11 psi(abs)] or higher |
TYPICAL MALFUNCTION THRESHOLDS
|
Malfunction counter (not multi-injection) / Firing counter of monitor condition enable |
higher than 0.8 |
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
![2023 - 2025 MY GR Corolla [09/2022 - ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON.
- Turn the GTS on.
- 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.
- Turn the ignition switch to ON.
- Turn the GTS on.
- Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.
- Ensure that the engine coolant temperature is -10 to 50 °C (-50 to 122 °F) then start the engine [A].
- Allow the engine to idle for 15 seconds or more [B].
- Enter the following menus: Powertrain / Engine / Trouble Codes [C].
-
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: P128300, P128400 or P128500.
-
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 is malfunctioning.
- If the judgment result is INCOMPLETE, perform steps [A] through [C] again.
-
[A] to [C]: 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 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 P020113.
Click here
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 be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
PROCEDURE
|
1. |
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P128300, P128400 AND/OR P128500) |
(a) Read the DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC P128300, P128400 and/or P128500 is output |
A |
|
DTC P128300, P128400 and/or P128500and other DTCs are output |
B |
HINT:
If any DTCs other than P128300, P128400 and/or P128500 are output, troubleshoot those DTCs first.
| B |
|
GO TO DTC CHART |
|
|
2. |
CHECK DTC OUTPUT |
(a) Read the DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
Only 1 DTC among DTC P128300, P128400 and P128500 is output |
A |
|
2 or more DTCs among DTC P128300, P128400 and P128500 are output |
B |
HINT:
If the malfunction occurred for one cylinder or multiple cylinders can be determined based on the stored DTCs.
| B |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR |
(a) Disconnect the ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C142-31 (#1D+) - C142-12 (#1D-) |
20°C (68°F) |
1.34 to 1.64 Ω |
|
C142-33 (#2D+) - C142-14 (#2D-) |
20°C (68°F) |
1.34 to 1.64 Ω |
|
C142-35 (#3D+) - C142-16 (#3D-) |
20°C (68°F) |
1.34 to 1.64 Ω |
|
C142-31 (#1D+) or C142-12 (#1D-) - Body ground and other terminals |
Always |
1 MΩ or higher |
|
C142-33 (#2D+) or C142-14 (#2D-) - Body ground and other terminals |
Always |
1 MΩ or higher |
|
C142-35 (#3D+) or C142-16 (#3D-) - Body ground and other terminals |
Always |
1 MΩ or higher |
HINT:
- The standard values shown are direct fuel injector assembly resistance values.
- If the measured resistance value differs from the other cylinders and the injector resistance is normal, check the related cylinder as a poorly connected connector is suspected.
| OK |
|
|
|
4. |
INSPECT DIRECT FUEL INJECTOR ASSEMBLY (RESISTANCE) |
(a) Check the resistance of the direct fuel injector assembly.
Click here
| OK |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (DIRECT FUEL INJECTOR ASSEMBLY - ECM) |
|
|
5. |
REPLACE DIRECT FUEL INJECTOR ASSEMBLY |
Click here
HINT:
Perform "Inspection After Repair" after replacing the direct fuel injector assembly.
Click here
| NEXT |
|
|
6. |
REPLACE ECM |
Click here
|
|
7. |
CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(b) Turn the ignition switch off and wait for at least 30 seconds.
|
|
8. |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Read the DTCs.
Powertrain > Engine > Trouble Codes
OK:
DTCs are not output.
| NEXT |
|
END |
|
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