Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000025DU4 |
Model Year Start: 2023 |
Model: Corolla |
Prod Date Range: [09/2022 -
] |
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C121F62; Electronic Brake Booster Control Module "A" Signal Compare Failure; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] |
DTC
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C121F62
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Electronic Brake Booster Control Module "A" Signal Compare Failure
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DESCRIPTION
When the self-check function of the electric brake booster (brake booster with master cylinder assembly) detects an internal circuit malfunction, this DTC is stored.
DTC No.
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Detection Item
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DTC Detection Condition
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Trouble Area
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MIL
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DTC Output from
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Note
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C121F62
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Electronic Brake Booster Control Module "A" Signal Compare Failure
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Electric brake booster (brake booster with master cylinder assembly) internal malfunction detected.
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Electric brake booster (brake booster with master cylinder assembly)
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Comes on
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Brake Booster
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-
SAE Code: C121F (Case 1)
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Output ECU: Electric brake booster (brake booster with master cylinder assembly)
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MONITOR DESCRIPTION
When the electronically controlled brake system is starting and the non-volatile memory in the electric brake booster (brake booster with master cylinder assembly) is invalid or cannot be read, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
MONITOR STRATEGY
Related DTCs
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C121F (Case 1): EEPROM read error
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Required Sensors/Components(Main)
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Electric brake booster (brake booster with master cylinder assembly)
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Required Sensors/Components(Related)
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Electric brake booster (brake booster with master cylinder assembly)
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Frequency of Operation
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During initial checking
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Duration
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-
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MIL Operation
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Immediately
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Sequence of Operation
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None
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TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored
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TMC's intellectual property
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Other conditions belong to TMC's intellectual property
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-
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TYPICAL MALFUNCTION THRESHOLDS
TMC's intellectual property
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-
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COMPONENT OPERATING RANGE
TMC's intellectual property
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-
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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:
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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.
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When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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Connect the GTS to the DLC3.
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Turn the ignition switch to ON and turn the GTS on.
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Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
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Turn the ignition switch off.
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Turn the ignition switch to ON (READY) and turn the GTS on.
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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.
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Enter the following menus: Chassis / Brake Booster / Utility / All Readiness.
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Check the DTC judgment result.
HINT:
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If the judgment result shows NORMAL, the system is normal.
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If the judgment result shows ABNORMAL, the system has a malfunction.
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If the judgment result shows INCOMPLETE, perform driving pattern again.
PROCEDURE
1.
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REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY
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Click here
NEXT |
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END
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