- DTC judgment completed
- System normal
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000255VA |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P12D41D; Fuel Pump Control Circuit Current Out of Range; 2023 - 2025 MY GR Corolla [09/2022 - ] | ||
|
DTC |
P12D41D |
Fuel Pump Control Circuit Current Out of Range |
DESCRIPTION
Refer to DTC P062712.
Click here
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|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Note |
|---|---|---|---|---|---|
|
P12D41D |
Fuel Pump Control Circuit Current Out of Range |
When the fuel pump control ECU operation duty ratio is 3 to 65%, overcurrent in the fuel pump circuit is detected for 3 seconds or more (2 trip detection logic). |
|
Comes on |
SAE Code: P12D4 |
Related Data List
|
DTC No. |
Data List |
|---|---|
|
P12D41D |
Fuel Pump Control Duty Ratio |
MONITOR DESCRIPTION
The fuel pump control ECU monitors the fuel pump drive circuit.
When a malfunction is detected in the fuel pump drive circuit, the diagnosis output circuit in the fuel pump control ECU modifies the operation signal sent by the ECM to indicate that there is a malfunction.
When the fuel pump control ECU operation duty ratio is 3 to 65% and overcurrent in the fuel pump circuit is detected for 3 seconds or more, the diagnosis output circuit in the fuel pump control ECU modifies the operation signal sent by the ECM to indicate that there is a malfunction and the ECM stores a DTC.
MONITOR STRATEGY
|
Related DTCs |
P12D4: Fuel pump overcurrent |
|
Required Sensors/Components (Main) |
Fuel pump control ECU |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Continuous |
|
Duration |
3 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 |
- |
|
Output duty cycle |
3 to 65% |
|
Battery voltage |
10.5 V or higher |
|
Ignition switch |
ON |
|
Starter |
Off |
TYPICAL MALFUNCTION THRESHOLDS
|
Fuel pump overcurrent error from fuel pump control module |
Received |
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
- 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.
- Start the engine and wait 10 seconds or more [A].
- Turn the GTS on.
- Enter the following menus: Powertrain / Engine / Trouble Codes [B].
-
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: P12D41D.
-
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 is malfunctioning.
- If the judgment result is INCOMPLETE, run the engine at an engine speed of 2500 rpm or more for 10 seconds or more and check the DTC judgment result again.
-
[A] to [B]: 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 P062712.
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 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. |
INSPECT FUEL PUMP CONTROL ECU |
(a) Disconnect the fuel pump control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*a |
Component without harness connected (Fuel Pump Control ECU) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O180-2 (FPU) - O172-3 (GND) |
Always |
2 kΩ or higher |
|
O180-3 (FPV) - O172-3 (GND) |
Always |
2 kΩ or higher |
|
O180-4 (FPW) - O172-3 (GND) |
Always |
2 kΩ or higher |
HINT:
This procedure checks for an internal short of the fuel pump control ECU when its transistor is stuck on.
| NG |
|
REPLACE FUEL PUMP CONTROL ECU
|
|
|
2. |
PERFORM ACTIVE TEST USING GTS (FUEL PUMP SINGLE PHASE ENERGIZATION) |
(a) Disconnect the fuel pump control ECU connector.
|
(b) Operate the fuel pump control ECU using the Active Test function and measure the voltage according to the value(s) in the table below. Powertrain > Engine > Active Test
Standard Voltage:
HINT:
|
|
| NG |
|
REPLACE FUEL PUMP CONTROL ECU
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - FUEL PUMP (FOR LOW PRESSURE SIDE)) |
(a) Disconnect the fuel pump control ECU connector.
(b) Disconnect the fuel pump (for low pressure side) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O180-2 (FPU) or O45-3 (BLPU) - Other terminals |
Always |
10 kΩ or higher |
|
O180-3 (FPV) or O45-4 (BLPV) - Other terminals |
Always |
10 kΩ or higher |
|
O180-4 (FPW) or O45-2 (BLPW) - Other terminals |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE) |
Click here
HINT:
Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).
Click here
|
|
5. |
CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(b) Turn the ignition switch off and wait for at least 30 seconds.
|
|
6. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P12D41D) |
(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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