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Home >> Lexus >> 2021 >> UX 250h Luxury >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (Diagnostic Codes) (1 Of 4) (Hybrid) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1242: Open Circuit in IG1/IG2 Power Source Circuit [10/2018 - ] >> Typical Enabling Conditions

Typical Enabling Conditions

C123B

Monitor runs whenever the following DTCs are not stored None
IG2 voltage Higher than 9.5 V
C123E

Monitor runs whenever the following DTCs are not stored None
Both of the following conditions are met A and B
A. IG1 voltage Higher than 9.5 V
B. Either of the following condition is met -
Vehicle speed Higher than 10 km/h (6 mph)
Communication status with hybrid control system Valid