- Coolant Temperature
- Electric Water Pump Target Speed
- Electric Water Pump Speed
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001MTEA |
| Model Year Start: 2020 | Model: Corolla Hatchback | Prod Date Range: [09/2019 - 09/2022] |
| Title: M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P26CE37; Engine Coolant Pump Overspeed; 2020 - 2022 MY Corolla Corolla Hatchback [09/2019 - 09/2022] | ||
|
DTC |
P26CE37 |
Engine Coolant Pump Overspeed |
DESCRIPTION
Refer to DTC P26CA12.
Click here
![2020 - 2022 MY Corolla Corolla Hatchback [03/2019 - 09/2022]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P26CA12; Engine Coolant Pump Circuit Short to Battery+](/t3Portal/stylegraphics/info.gif)
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P26CE37 |
Engine Coolant Pump Overspeed |
The speed of the engine water pump assembly is a certain value or more when an operation request signal is being output to the engine water pump assembly (1 trip detection logic). |
|
Does not come on |
DTC stored |
|
Related Data List
|
DTC No. |
Data List |
|---|---|
|
P26CE37 |
|
MONITOR DESCRIPTION
The ECM monitors the speed of the engine water pump assembly. When the speed becomes a certain value or more, the ECM judges that the speed is abnormally high and stores a DTC (The MIL does not illuminate).
MONITOR STRATEGY
|
Frequency of Operation |
Continuous |
CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream 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 Techstream on.
- Move the shift lever to P or neutral.
- Start the engine and maintain an engine speed of 2500 rpm or more for at least 40 seconds [A].
- 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: P26CE37.
-
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.
- If the judgment result is INCOMPLETE, perform steps [C] through [D].
- Idle the engine for 5 minutes or more [C].
- Enter the following menus: Powertrain / Engine / Trouble Codes [D].
-
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.
-
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
HINT:
- If the engine is run continuously with a low engine coolant level, DTC P26CE37 may be stored.
- If the engine coolant level is sufficient but DTC P26CE37 is output, confirm with the customer whether engine coolant was added after the vehicle had been driven with insufficient engine coolant.
- 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
|
1. |
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P26CE37) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC P26CE37 is output |
A |
|
DTC P26CE37 and other DTCs are output |
B |
|
DTC P26CE37 and P26CB71 are output |
C |
HINT:
- If any DTCs other than P26CE37 are output, troubleshoot those DTCs first.
- If both DTC P26CB71 (pump stuck) and P26CE37 (pump overspeed) are stored, perform troubleshooting for DTC P26CB71 first as the engine coolant pump assembly may be stuck.
| B |
|
GO TO DTC CHART
|
| C |
|
GO TO DTC P26CB71
|
|
|
2. |
CHECK ENGINE COOLANT LEVEL IN RESERVOIR TANK |
(a) Check that the engine coolant level is between the FULL and LOW lines.
for Fully Sealed Type: Click here
for Non-Fully Sealed Type: Click here
|
Result |
Proceed to |
|---|---|
|
Engine coolant level is above the LOW line |
A |
|
Engine coolant level is below the LOW line |
B |
| A |
|
|
|
3. |
CHECK FOR ENGINE COOLANT LEAKS |
(a) Check the areas around the engine and heater for engine coolant leaks.
for Fully Sealed Type: Click here
for Non-Fully Sealed Type: Click here
HINT:
If the engine oil is cloudy during the engine oil level gauge check, it means that engine coolant has entered the engine lubrication system.
OK:
No leaks.
| NG |
|
|
|
4. |
ADD ENGINE COOLANT |
(a) Fill the reservoir tank up to the FULL line with engine coolant.
NOTICE:
Make sure not to add engine coolant when the engine is hot.
| NEXT |
|
|
5. |
REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA |
(a) Repair any engine coolant leaks.
HINT:
Add engine coolant and perform air bleeding after repair.
|
|
6. |
BLEED ENGINE COOLANT |
(a) Bleed air from the cooling system.
Click here
|
|
7. |
CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(e) Turn the ignition switch off and wait for at least 30 seconds.
|
|
8. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P26CE37) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Trouble Codes.
(c) Read the DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTC P26CB71 is output |
B |
|
DTC P26CE37 is output |
C |
| A |
|
END |
| B |
|
GO TO DTC P26CB71
|
|
|
9. |
BLEED ENGINE COOLANT |
(a) Bleed air from the cooling system.
Click here
|
|
10. |
CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(e) Turn the ignition switch off and wait for at least 30 seconds.
|
|
11. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P26CE37) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Trouble Codes.
(c) Read the DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTC P26CE37 is output |
B |
| A |
|
END |
|
|
12. |
REPLACE ENGINE WATER PUMP ASSEMBLY (WATER INLET HOUSING) |
(a) Replace the engine water pump assembly (water inlet housing).
Click here
HINT:
When replacing any cooling system parts, if excessive deposits of rust or scale exist or the concentration of the engine coolant is abnormal, replace the engine coolant.
|
|
13. |
CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(e) Turn the ignition switch off and wait for at least 30 seconds.
|
|
14. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P26CE37) |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine / Trouble Codes.
(c) Read the DTCs.
Powertrain > Engine > Trouble Codes
HINT:
If no DTC is output, the repair has been successfully completed.
| NEXT |
|
END |
|
|