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Home >> Lexus >> 2021 >> LS 500h AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/O Advanced Park) - Diagnostic Codes (3 Of 3) & Symptom Tests >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Advanced Park) >> DTC C1451: Motor Drive Permission Malfunction [10/2020 - 10/2023] >> Description

DTC C1451: Motor Drive Permission Malfunction [10/2020 - 10/2023]: Description

If air bleeding has not been performed, the skid control ECU assembly stores DTC C1451 to prevent the entry of air due to pump motor operation.

DTC C1451 is stored when Invalid Mode is selected, the system will not return to normal until the air bleeding procedure is performed.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area MIL Note
C1451 Motor Drive Permission Malfunction 120 Air bleeding has not been performed.
  • Brake fluid leaks
  • Air bleeding not performed
Only DTC C1451 (INF code 120) is stored: Does not come on
SAE Code C1451 is stored: Comes on
INF Code 120: SAE Code C1451
HINT: 
DTC C1451 (INF code 120) is cleared when the conditions return to normal.