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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Electronically Controlled Brake System (Hybrid) - Diagnostic Codes (1 Of 5)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1214: Hydraulic Control System Malfunction [06/2018 - 07/2019] >> Monitor Strategy

Monitor Strategy

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Related DTCs C139A: One hydraulic path fail
C139D: Linear solenoid (SLA) stuck on
C13CD: Brake pressure too low
C13CE: Brake pressure too high
C1400: ABS reduction solenoid leakage
C14EE: Switching solenoid (SSA) stuck on
C14F7: Switching solenoid (SGH) stuck on
Required Sensors/Components(Main) Skid control ECU (brake booster with master cylinder assembly)
Brake actuator (brake booster with master cylinder assembly)
Brake actuator assembly
Required Sensors/Components(Related) Speed sensor
Stop light switch assembly
Skid control ECU (brake booster with master cylinder assembly)
Brake actuator (brake booster with master cylinder assembly)
Brake pedal stroke sensor assembly
Frequency of Operation Continuous: C139D, C13CD, C13CE
After power switch off: C139A, C1400, C14EE, C14F7
Duration Within 1 second: C139A (Case 1), C139A (Case 2), C139D (Case 1), C13CD (Case 1), C13CD (Case 2), C13CE (Case 1), C13CE (Case 2), C13CE (Case 3) and C1400
1.002 seconds: C139D (Case 2) and C139D (Case 3)
1.5 seconds: (b) or (d) in the table of C14EE and C14F7 in Typical Malfunction Thresholds
6 seconds: (a) or (c) in the table of C14EE and C14F7 in Typical Malfunction Thresholds
MIL Operation Immediately
Sequence of Operation C1400: 
  1. 1. Brake actuator assembly
  2. 2. Brake actuator (brake booster with master cylinder assembly), brake actuator assembly