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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 65 (Electronically Controlled Brake System (HV) - Diagnostic Codes (10 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C14C6-16: Electronic Brake Booster Control Module "A" Supply Voltage Circuit Voltage Below Threshold [11/2023 - ] >> Description

DTC C14C6-16: Electronic Brake Booster Control Module "A" Supply Voltage Circuit Voltage Below Threshold [11/2023 - ]: Description

WARNING: This page is about a different variant/trim than selected.

Refer to DTC C110E-14.

Refer to DTC C110E-14: Brake Booster Motor "A" Supply Voltage Circuit Short to Ground or Open [11/2023 - ]

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note
C14C6-16 Electronic Brake Booster Control Module "A" Supply Voltage Circuit Voltage Below Threshold Either of the following is detected:
  • Any of the following is detected when the ECU internal voltage is 6.92 V or less:
    • When operation of the main relay is requested, the relay output voltage is less than a certain value for 10.05 seconds or more.
    • The stroke sensor value invalid for 10.2 seconds or more.
    • The reaction force pressure sensor value invalid for 10.2 seconds or more.
    • The voltage supplied to the servo pressure sensor is a certain value or less or a certain value or more for 10.06 seconds or more.
    • The servo pressure sensor value invalid for 10.2 seconds or more.
    • The voltage supplied to the reaction force pressure sensor is a certain value or less or a certain value or more for 10.06 seconds or more.
  • When the internal voltage of the ECU is 8.3 V or less, the accumulator pressure sensor value is invalid for 10.8 seconds or more.
  • Improperly connected connector, deformation or corrosion of terminals
  • Wire harness and connector
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
Comes on
  • SAE Code: C14C7
  • Output ECU: Both skid control ECUs