| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000025DUP |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C148A1C,...,C149A1C; Electronic Brake Booster Motor "A" Temperature Sensor "A" Circuit Voltage Out of Range; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] | ||
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DTC |
C148A1C |
Electronic Brake Booster Motor "A" Temperature Sensor "A" Circuit Voltage Out of Range |
|
DTC |
C148F62 |
Electronic Brake Booster Motor Temperature "A" / "B" Signal Compare Failure |
|
DTC |
C149A1C |
Electronic Brake Booster Motor "A" Temperature Sensor "B" Circuit Voltage Out of Range |
DESCRIPTION
Refer to DTC C11704B
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![2023 - 2025 MY Corolla Corolla HV [09/2022 - ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C11704B; Electronic Brake Booster Motor "A" Over Temperature](/t3Portal/stylegraphics/info.gif)
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
DTC Output from |
Note |
|---|---|---|---|---|---|---|
|
C148A1C |
Electronic Brake Booster Motor "A" Temperature Sensor "A" Circuit Voltage Out of Range |
Temp sensor 1 output voltage is 3.27 V or more, or 0.2 V or less, for 0.6 seconds or more. |
Electric brake booster (brake booster with master cylinder assembly) |
Comes on |
Brake Booster |
|
|
C148F62 |
Electronic Brake Booster Motor Temperature "A" / "B" Signal Compare Failure |
The sum of temp sensor 1 and temp sensor 2 output voltages is within the range of 3.17 V to 3.43 V for 0.6 seconds or more. |
Electric brake booster (brake booster with master cylinder assembly) |
Comes on |
Brake Booster |
|
|
C149A1C |
Electronic Brake Booster Motor "A" Temperature Sensor "B" Circuit Voltage Out of Range |
Temp sensor 2 output voltage is 3.27 V or more, or 0.2 V or less, for 0.6 seconds or more. |
Electric brake booster (brake booster with master cylinder assembly) |
Comes on |
Brake Booster |
|
MONITOR DESCRIPTION
C148B (Case 1):
-
2 temperature sensor systems that measure the temperature of the motor drive circuit are built into the electric brake booster (brake booster with master cylinder assembly).
When the electronically controlled brake system is operating or shutting down and the voltage value of the No. 1 temperature sensor exceeds a certain value, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
C148B (Case 2):
-
2 temperature sensor systems that measure the temperature of the motor drive circuit are built into the electric brake booster (brake booster with master cylinder assembly).
When the electronically controlled brake system is operating or shutting down and the voltage value of the No. 1 temperature sensor is less than a certain value, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
C148F:
-
There are 2 temperature sensor systems that measure the temperature of the motor drive circuit built into the electric brake booster (brake booster with master cylinder assembly). One has a positive coefficient characteristic (as the temperature increases, the output value increases) and the other has a negative coefficient characteristic (as the temperature increases, the output value decreases).
When the electronically controlled brake system is operating or shutting down and it is detected that the total voltage value of the No. 1 and No. 2 temperature sensor is outside of a certain range a certain number of times or more, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
C149B (Case 1):
-
2 temperature sensor systems that measure the temperature of the motor drive circuit are built into the electric brake booster (brake booster with master cylinder assembly).
When the electronically controlled brake system is operating or shutting down and the voltage value of the No. 2 temperature sensor exceeds a certain value, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
C149B (Case 2):
-
2 temperature sensor systems that measure the temperature of the motor drive circuit are built into the electric brake booster (brake booster with master cylinder assembly).
When the electronically controlled brake system is operating or shutting down and the voltage value of the No. 2 temperature sensor is less than a certain value, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
MONITOR STRATEGY
|
Related DTCs |
C148B (Case 1): Temperature sensor line monitoring (ch1-high) C148B (Case 2): Temperature sensor line monitoring (ch1-low) C148F: Temperature sensor rationality monitoring (SUM monitoring) C149B (Case 1): Temperature sensor line monitoring (ch2-high) C149B (Case 2): Temperature sensor line monitoring (ch2-low) |
|
Required Sensors/Components(Main) |
Electric brake booster (brake booster with master cylinder assembly) |
|
Required Sensors/Components(Related) |
Electric brake booster (brake booster with master cylinder assembly) |
|
Frequency of Operation |
Continuous |
|
Duration |
0.6 seconds |
|
MIL Operation |
2 driving cycles |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever the following DTCs are not stored |
TMC's intellectual property |
|
Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
|
TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
|
TMC's intellectual property |
- |
CONFIRMATION DRIVING PATTERN
NOTICE:
When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.
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.
- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off.
- Turn the ignition switch to ON (READY) and turn the GTS on.
-
Wait for 1 second or more. [*]
HINT:
[*]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Chassis / Brake Booster / Utility / All Readiness.
-
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.
PROCEDURE
|
1. |
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
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| NEXT |
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END |
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