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Home >> Toyota >> 2020 >> Avalon Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 113 (Electronically Controlled Brake System - Diagnostic Codes (C1202-C1300) (Hybrid)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1242: Open Circuit in IG1/IG2 Power Source Circuit [04/2018 -] >> Monitor Description

Monitor Description

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  1. During normal operation, the voltage at IG1 and IG2 change mutually; however, if the voltages do not change mutually such as when IG1 is on and IG2 is off or when IG1 is off and IG2 is on, the skid control ECU (brake booster with master cylinder assembly) judges that there is an open in the IG1 or IG2 circuit and illuminates the MIL and stores a DTC.
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