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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 71 (Electronically Controlled Brake System (HEV) - Diagnostic Codes (3 Of 6)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C121F-62: Electronic Brake Booster Control Module "A" Signal Compare Failure [09/2022 - ] >> Description

DTC C121F-62: Electronic Brake Booster Control Module "A" Signal Compare Failure [09/2022 - ]: Description

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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. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from Note
C121F-62 Electronic Brake Booster Control Module "A" Signal Compare Failure Electric brake booster (brake booster with master cylinder assembly) internal malfunction detected. Electric brake booster (brake booster with master cylinder assembly) Comes on Brake Booster
  • SAE Code: C121F (Case 1)
  • Output ECU: Electric brake booster (brake booster with master cylinder assembly)