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Home >> Lexus >> 2021 >> LC 500 2D Coupe >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (Coupe) (2 Of 4) >> Electronically Controlled Brake System >> DTC C1315/31: SMC1 Changeover Solenoid Malfunction; DTC C1316/32: SMC2 Changeover Solenoid Malfunction; DTC C1352/21: Front Increasing Pressure Solenoid RH Malfunction; DTC C1353/23: Front Increasing Pressure Solenoid LH Malfunction; DTC C1354/25: Rear Increasing Pressure Solenoid RH Malfunction; DTC C1355/27: Rear Increasing Pressure Solenoid LH Malfunction; DTC C1356/22: Front Decreasing Pressure Solenoid RH Malfunction; DTC C1357/24: Front Decreasing Pressure Solenoid LH Malfunction; DTC C1358/26: Rear Decreasing Pressure Solenoid RH Malfunction; DTC C1359/28: Rear Decreasing Pressure Solenoid LH Malfunction [03/2017 - 09/2018] >> Description

DTC C1315/31: SMC1 Changeover Solenoid Malfunction; DTC C1316/32: SMC2 Changeover Solenoid Malfunction; DTC C1352/21: Front Increasing Pressure Solenoid RH Malfunction; DTC C1353/23: Front Increasing Pressure Solenoid LH Malfunction; DTC C1354/25: Rear Increasing Pressure Solenoid RH Malfunction; DTC C1355/27: Rear Increasing Pressure Solenoid LH Malfunction; DTC C1356/22: Front Decreasing Pressure Solenoid RH Malfunction; DTC C1357/24: Front Decreasing Pressure Solenoid LH Malfunction; DTC C1358/26: Rear Decreasing Pressure Solenoid RH Malfunction; DTC C1359/28: Rear Decreasing Pressure Solenoid LH Malfunction [03/2017 - 09/2018]: Description

Each solenoid adjusts the pressure which affects each wheel cylinder according to signals from the skid control ECU assembly and controls the vehicle.

The master cut solenoid (SMC1/2) is closed and blocks the master cylinder pressure from the electronically controlled brake system control pressure when the system is normal. The master cut solenoid is open and sends the master cylinder hydraulic pressure to the non-assisted brake wheel cylinders during fail-safe operation due to a system malfunction.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1315/31 SMC1 Changeover Solenoid Malfunction 61
62
63
64
  • INF Code: 61
    • Either of the following is detected:
      1. SMC1 drive circuit is malfunctioning for 0.05 seconds or more.
      2. Short to +B in SMC1.
  • INF Code: 62
    • Current leaks for 0.05 seconds or more when SMC1 is off.
  • INF Code: 63
    • Open circuit in SMC1 continues for 0.05 seconds or more.
  • INF Code: 64
    • Overcurrent in SMC1 continues for 0.05 seconds or more.
  • INF Code: 61, 62, 63
    • Open or short in wire harness
    • Master cut solenoid (SMC1) circuit
    • Skid control ECU assembly
  • INF Code: 64
    • Short in wire harness
    • Master cut solenoid (SMC1) circuit
    • Skid control ECU assembly
 Electronically controlled brake system DTC
C1316/32 SMC2 Changeover Solenoid Malfunction 66
67
68
69
  • INF Code: 66
    • Either of the following is detected:
      1. SMC2 drive circuit is malfunctioning for 0.05 seconds or more.
      2. Short to +B in SMC2.
  • INF Code: 67
    • Current leaks for 0.05 seconds or more when SMC2 is off.
  • INF Code: 68
    • Open circuit in SMC2 continues for 0.05 seconds or more.
  • INF Code: 69
    • Overcurrent in SMC2 continues for 0.05 seconds or more.
  • INF Code: 66, 67, 68
    • Open or short in wire harness
    • Master cut solenoid (SMC2) circuit
    • Skid control ECU assembly
  • INF Code: 69
    • Short in wire harness
    • Master cut solenoid (SMC2) circuit
    • Skid control ECU assembly
 Electronically controlled brake system DTC
C1352/21 Front Increasing Pressure Solenoid RH Malfunction 11
12
13
14
  • INF Code: 11
    • Open circuit in FRA continues for 0.05 seconds or more when FRA is off.
  • INF Code: 12
    • Open circuit in FRA continues for 0.05 seconds or more when FRA is on.
  • INF Code: 13
    • Short to +B or voltage leak in FRA continues for 0.05 seconds or more.
  • INF Code: 14
    • Overcurrent in FRA continues for 0.05 seconds or more.
  • INF Code: 11, 12
    • Open or short in wire harness
    • Improperly connected connector, deformation or corrosion of terminals
    • Brake actuator assembly
    • Skid control ECU assembly
  • INF Code: 13, 14
    • Short in wire harness
    • Brake actuator assembly
    • Skid control ECU assembly
 Electronically controlled brake system DTC
C1353/23 Front Increasing Pressure Solenoid LH Malfunction 21
22
23
24
  • INF Code: 21
    • Open circuit in FLA continues for 0.05 seconds or more when FLA is off.
  • INF Code: 22
    • Open circuit in FLA continues for 0.05 seconds or more when FLA is on.
  • INF Code: 23
    • Short to +B or voltage leak in FLA continues for 0.05 seconds or more.
  • INF Code: 24
    • Overcurrent in FLA continues for 0.05 seconds or more.
  • INF Code: 21, 22
    • Open or short in wire harness
    • Improperly connected connector, deformation or corrosion of terminals
    • Brake actuator assembly
    • Skid control ECU assembly
  • INF Code: 23, 24
    • Short in wire harness
    • Brake actuator assembly
    • Skid control ECU assembly
 Electronically controlled brake system DTC
C1354/25 Rear Increasing Pressure Solenoid RH Malfunction 31
32
33
34
  • INF Code: 31
    • Open circuit in RRA continues for 0.05 seconds or more when RRA is off.
  • INF Code: 32
    • Open circuit in RRA continues for 0.05 seconds or more when RRA is on.
  • INF Code: 33
    • Short to +B or voltage leak in RRA continues for 0.05 seconds or more.
  • INF Code: 34
    • Overcurrent in RRA continues for 0.05 seconds or more.
  • INF Code: 31, 32
    • Open or short in wire harness
    • Improperly connected connector, deformation or corrosion of terminals
    • Brake actuator assembly
    • Skid control ECU assembly
  • INF Code: 33, 34
    • Short in wire harness
    • Brake actuator assembly
    • Skid control ECU assembly
 Electronically controlled brake system DTC
C1355/27 Rear Increasing Pressure Solenoid LH Malfunction 41
42
43
44
  • INF Code: 41
    • Open circuit in RLA continues for 0.05 seconds or more when RLA is off.
  • INF Code: 42
    • Open circuit in RLA continues for 0.05 seconds or more when RLA is on.
  • INF Code: 43
    • Short to +B or voltage leak in RLA continues for 0.05 seconds or more.
  • INF Code: 44
    • Overcurrent in RLA continues for 0.05 seconds or more.
  • INF Code: 41, 42
    • Open or short in wire harness
    • Improperly connected connector, deformation or corrosion of terminals
    • Brake actuator assembly
    • Skid control ECU assembly
  • INF Code: 43, 44
    • Short in wire harness
    • Brake actuator assembly
    • Skid control ECU assembly
 Electronically controlled brake system DTC
C1356/22 Front Decreasing Pressure Solenoid RH Malfunction 16
17
18
19
  • INF Code: 16
    • Open circuit in FRR continues for 0.05 seconds or more when FRR is off.
  • INF Code: 17
    • Open circuit in FRR continues for 0.05 seconds or more when FRR is on.
  • INF Code: 18
    • Short to +B or voltage leak in FRR continues for 0.05 seconds or more.
  • INF Code: 19
    • Overcurrent in FRR continues for 0.05 seconds or more.
  • INF Code: 16, 17
    • Open or short in wire harness
    • Improperly connected connector, deformation or corrosion of terminals
    • Brake actuator assembly
    • Skid control ECU assembly
  • INF Code: 18, 19
    • Short in wire harness
    • Brake actuator assembly
    • Skid control ECU assembly
 Electronically controlled brake system DTC
C1357/24 Front Decreasing Pressure Solenoid LH Malfunction 26
27
28
29
  • INF Code: 26
    • Open circuit in FLR continues for 0.05 seconds or more when FLR is off.
  • INF Code: 27
    • Open circuit in FLR continues for 0.05 seconds or more when FLR is on.
  • INF Code: 28
    • Short to +B or voltage leak in FLR continues for 0.05 seconds or more.
  • INF Code: 29
    • Overcurrent in FLR continues for 0.05 seconds or more.
  • INF Code: 26, 27
    • Open or short in wire harness
    • Improperly connected connector, deformation or corrosion of terminals
    • Brake actuator assembly
    • Skid control ECU assembly
  • INF Code: 28, 29
    • Short in wire harness
    • Brake actuator assembly
    • Skid control ECU assembly
 Electronically controlled brake system DTC
C1358/26 Rear Decreasing Pressure Solenoid RH Malfunction 36
37
38
39
  • INF Code: 36
    • Open circuit in RRR continues for 0.05 seconds or more when RRR is off.
  • INF Code: 37
    • Open circuit in RRR continues for 0.05 seconds or more when RRR is on.
  • INF Code: 38
    • Short to +B or voltage leak in RRR continues for 0.05 seconds or more.
  • INF Code: 39
    • Overcurrent in RRR continues for 0.05 seconds or more.
  • INF Code: 36, 37
    • Open or short in wire harness
    • Improperly connected connector, deformation or corrosion of terminals
    • Brake actuator assembly
    • Skid control ECU assembly
  • INF Code: 38, 39
    • Short in wire harness
    • Brake actuator assembly
    • Skid control ECU assembly
 Electronically controlled brake system DTC
C1359/28 Rear Decreasing Pressure Solenoid LH Malfunction 46
47
48
49
  • INF Code: 46
    • Open circuit in RLR continues for 0.05 seconds or more when RLR is off.
  • INF Code: 47
    • Open circuit in RLR continues for 0.05 seconds or more when RLR is on.
  • INF Code: 48
    • Short to +B or voltage leak in RLR continues for 0.05 seconds or more.
  • INF Code: 49
    • Overcurrent in RLR continues for 0.05 seconds or more.
  • INF Code: 46, 47
    • Open or short in wire harness
    • Improperly connected connector, deformation or corrosion of terminals
    • Brake actuator assembly
    • Skid control ECU assembly
  • INF Code: 48, 49
    • Short in wire harness
    • Brake actuator assembly
    • Skid control ECU assembly
 Electronically controlled brake system DTC
DTC No. Brake warning light / yellow (minor malfunction) code ABS warning light code Slip indicator light code Brake hold standby indicator light code
C1315 31 42 45 21
C1316 32 42 45 21
C1352 21 42 45 21
C1353 23 42 45 21
C1354 25 42 45 21
C1355 27 42 45 21
C1356 22 42 45 21
C1357 24 42 45 21
C1358 26 42 45 21
C1359 28 42 45 21
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