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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 C1311: Open Circuit in Main Relay 1; DTC C1312: Short Circuit in Main Relay 1 [06/2018 - ] >> Monitor Strategy

Monitor Strategy

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Related DTCs C12FA: Main relay circuit low
C12FB: Main relay circuit high
Required Sensors/Components(Main) Skid control ECU (brake booster with master cylinder assembly)
Required Sensors/Components(Related) Skid control ECU (brake booster with master cylinder assembly)
Frequency of Operation Continuous: C12FA (Case 1) and C12FB (Case 1)
During initial checking: C12FA (Case 2) and C12FB (Case 2)
Duration 0.054 seconds: C12FA (Case 1)
0.2 seconds: C12FA (Case 2)
2 seconds: C12FB (Case 2)
4.5 seconds: C12FB (Case 1)
MIL Operation Immediately
Sequence of Operation None
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