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Home >> Toyota >> 2018 >> Prius One >> Repair and Diagnosis >> External Pages >> Different car >> Section 381 (Electronically Controlled Brake System - Diagnostic Codes (C1415-U0073) & Symptom Tests (Hybrid)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1425: Open in Stop Switch Circuit; DTC P0573: Brake Switch "A" Circuit High [04/2018 - ] >> Monitor Description

Monitor Description

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When the voltage at terminal STP is outside the range of that when the stop light switch assembly is on or the range of that when the stop light switch assembly is off for a certain amount of time, the skid control ECU (brake booster with master cylinder assembly) judges that there is an open in the stop light switch assembly circuit and illuminates the MIL and stores a DTC.

Also, if the voltage at terminal STP is always within the range of that when the stop light switch assembly is on after the vehicle is driven at a certain speed or more and stopped a specific number of times, the skid control ECU (brake booster with master cylinder assembly) judges that the stop light switch assembly is stuck on and illuminates the MIL and stores a DTC.

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