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Home >> Toyota >> 2020 >> Avalon Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 128 (Electronically Controlled Brake System - Diagnostic Codes (C1311-C1413) (Hybrid)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1311: Open Circuit in Main Relay 1; DTC C1312: Short Circuit in Main Relay 1 [04/2018 -] >> Monitor Strategy

Monitor Strategy

WARNING: This page is about a different variant/trim than selected.
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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