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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 108 (Electronically Controlled Brake System (Hybrid) - Diagnostic Codes (2 Of 5)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1242: Open Circuit in IG1/IG2 Power Source Circuit [06/2018 - ] >> Monitor Strategy

Monitor Strategy

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
Related DTCs C123B: IG1 circuit low
C123E: IG2 circuit low
Required Sensors/Components(Main) Skid control ECU (brake booster with master cylinder assembly)
Required Sensors/Components(Related) Speed sensor
Skid control ECU (brake booster with master cylinder assembly)
Frequency of Operation Continuous
Duration 4 seconds
MIL Operation Immediately
Sequence of Operation None
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