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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 36 (Electronically Controlled Brake System (HV) - Diagnostic Codes (06 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C123D-14: IG2 Circuit Short to Ground or Open [10/2021 - 11/2023] >> Description

DTC C123D-14: IG2 Circuit Short to Ground or Open [10/2021 - 11/2023]: Description

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

If a malfunction is detected in the power supply circuit, the No. 2 skid control ECU (brake actuator assembly) power source voltage drops, or there is insufficient voltage to operate the main relay, the No. 2 skid control ECU (brake actuator assembly) will store these DTCs.

If the auxiliary battery voltage is temporarily low, these DTCs may be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note
C123D-14 IG2 Circuit Short to Ground or Open When communication with the hybrid vehicle control ECU is normal or the vehicle speed is 10 km/h (6 mph) or more, and the IG1 terminal voltage is 9.5 V or more, the IG2 terminal voltage is less than 3 V for 4 seconds or more.
  • Open or short in IG2 circuit
  • Improperly connected connector, deformation or corrosion of terminals
  • No. 2 skid control ECU (brake actuator assembly)
Comes on
  • SAE Code: C123E (Case 2)
  • Output ECU: No. 2 skid control ECU (brake actuator assembly)