ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1315/31, C1316/32, C1352/21, C1353/23, C1354/25, C1355/27, C1356/22, C1357/24, C1358/26, C1359/28

DTC Code DTC Name
C1315/31 SMC1 Changeover Solenoid Malfunction
C1316/32 SMC2 Changeover Solenoid Malfunction
C1352/21 Front Increasing Pressure Solenoid RH Malfunction
C1353/23 Front Increasing Pressure Solenoid LH Malfunction
C1354/25 Rear Increasing Pressure Solenoid RH Malfunction
C1355/27 Rear Increasing Pressure Solenoid LH Malfunction
C1356/22 Front Decreasing Pressure Solenoid RH Malfunction
C1357/24 Front Decreasing Pressure Solenoid LH Malfunction
C1358/26 Rear Decreasing Pressure Solenoid RH Malfunction
C1359/28 Rear Decreasing Pressure Solenoid LH Malfunction

DESCRIPTION

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

The master cut solenoid (SMC 1/2) 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 fluid pressure to the non-assisted brake wheel cylinders during the fail-safe operation when the system is malfunctioning.

DTC Code Information Code DTC Detection Condition Trouble Area
C1315/31 61

When either of the following is detected:


  1. SMC1 drive circuit is malfunctioning for 0.05 seconds or more.

  2. Short to power supply in SMC1.


  • SMC1 circuit

  • Wire harness

  • Skid control ECU

62 Current leaks for 0.05 seconds or more when SMC1 is off.
63 Open circuit in SMC1 continues for 0.05 seconds or more.
64 Overcurrent in SMC1 continues for 0.05 seconds or more.
C1316/32 66

When either of the following is detected:


  1. SMC2 drive circuit is malfunctioning for 0.05 seconds or more.

  2. Short to power supply in SMC2.


  • SMC2 circuit

  • Wire harness

  • Skid control ECU

67 Current leaks for 0.05 seconds or more when SMC2 is off.
68 Open circuit in SMC2 continues for 0.05 seconds or more.
69 Overcurrent in SMC2 continues for 0.05 seconds or more.
C1352/21 11 Open circuit in front increasing pressure solenoid RH continues for 0.05 seconds or more when front increasing pressure solenoid RH is off.
  • Wire harness

  • Brake actuator

  • Skid control ECU

12 Open circuit in front increasing pressure solenoid RH continues for 0.05 seconds or more when front increasing pressure solenoid RH is on.
13 Short to power supply or voltage leak in front increasing pressure solenoid RH continues for 0.05 seconds or more.
14 Overcurrent in front increasing pressure solenoid RH continues for 0.05 seconds or more.
C1353/23 21 Open circuit in front increasing pressure solenoid LH continues for 0.05 seconds or more when front increasing pressure solenoid LH is off.
  • Wire harness

  • Brake actuator

  • Skid control ECU

22 Open circuit in front increasing pressure solenoid LH continues for 0.05 seconds or more when front increasing pressure solenoid LH is on.
23 Short to power supply or voltage leak in front increasing pressure solenoid LH continues for 0.05 seconds or more.
24 Overcurrent in front increasing pressure solenoid LH continues for 0.05 seconds or more.
C1354/25 31 Open circuit in rear increasing pressure solenoid RH continues for 0.05 seconds or more when rear increasing pressure solenoid RH is off.
  • Wire harness

  • Brake actuator

  • Skid control ECU

32 Open circuit in rear increasing pressure solenoid RH continues for 0.05 seconds or more when rear increasing pressure solenoid RH is on.
33 Short to power supply or voltage leak in rear increasing pressure solenoid RH continues for 0.05 seconds or more.
34 Overcurrent in rear increasing pressure solenoid RH continues for 0.05 seconds or more.
C1355/27 41 Open circuit in rear increasing pressure solenoid LH continues for 0.05 seconds or more when rear increasing pressure solenoid LH is off.
  • Wire harness

  • Brake actuator

  • Skid control ECU

42 Open circuit in rear increasing pressure solenoid LH continues for 0.05 seconds or more when rear increasing pressure solenoid LH is on.
43 Short to power supply or voltage leak in rear increasing pressure solenoid LH continues for 0.05 seconds or more.
44 Overcurrent in rear increasing pressure solenoid LH continues for 0.05 seconds or more.
C1356/22 16 Open circuit in front decreasing pressure solenoid RH continues for 0.05 seconds or more when front decreasing pressure solenoid RH is off.
  • Wire harness

  • Brake actuator

  • Skid control ECU

17 Open circuit in front decreasing pressure solenoid RH continues for 0.05 seconds or more when front decreasing pressure solenoid RH is on.
18 Short to power supply or voltage leak in front decreasing pressure solenoid RH continues for 0.05 seconds or more.
19 Overcurrent in front decreasing pressure solenoid RH continues for 0.05 seconds or more.
C1357/24 26 Open circuit in front decreasing pressure solenoid LH continues for 0.05 seconds or more when front decreasing pressure solenoid LH is off.
  • Wire harness

  • Brake actuator

  • Skid control ECU

27 Open circuit in front decreasing pressure solenoid LH continues for 0.05 seconds or more when front decreasing pressure solenoid LH is on.
28 Short to power supply or voltage leak in front decreasing pressure solenoid LH continues for 0.05 seconds or more.
29 Overcurrent in front decreasing pressure solenoid LH continues for 0.05 seconds or more.
C1358/26 36 Open circuit in rear decreasing pressure solenoid RH continues for 0.05 seconds or more when rear decreasing pressure solenoid RH is off.
  • Wire harness

  • Brake actuator

  • Skid control ECU

37 Open circuit in rear decreasing pressure solenoid RH continues for 0.05 seconds or more when rear decreasing pressure solenoid RH is on.
38 Short to power supply or voltage leak in rear decreasing pressure solenoid RH continues for 0.05 seconds or more.
39 Overcurrent in rear decreasing pressure solenoid RH continues for 0.05 seconds or more.
C1359/28 46 Open circuit in rear decreasing pressure solenoid LH continues for 0.05 seconds or more when rear decreasing pressure solenoid LH is off.
  • Wire harness

  • Brake actuator

  • Skid control ECU

47 Open circuit in rear decreasing pressure solenoid LH continues for 0.05 seconds or more when rear decreasing pressure solenoid LH is on.
48 Short to power supply or voltage leak in rear decreasing pressure solenoid LH continues for 0.05 seconds or more.
49 Overcurrent in rear decreasing pressure solenoid LH continues for 0.05 seconds or more.

WIRING DIAGRAM

A001DCNE09

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU or brake actuator, perform initialization of linear solenoid valve and calibration Click here.

PROCEDURE


  1. INSPECT BRAKE ACTUATOR


    1. Figure 1. for LHD:

      A001D21E07

      Figure 2. for RHD:

      A001D21E08

      Disconnect the A27 actuator connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      20 (SMC1) - 19 (BS1) Always 15.3 to 25.0 Ω
      6 (SMC2) - 7 (BS2) Always 15.3 to 25.0 Ω
      8 (FRA+) - 5 (FRA-) Always 3.6 to 6.0 Ω
      22 (FRR+) - 21 (FRR-) Always 3.6 to 6.0 Ω
      13 (FLA+) - 14 (FLA-) Always 3.6 to 6.0 Ω
      27 (FLR+) - 28 (FLR-) Always 3.6 to 6.0 Ω
      12 (RRA+) - 11 (RRA-) Always 3.6 to 6.0 Ω
      10 (RLA+) - 9 (RLA-) Always 3.6 to 6.0 Ω
      26 (RRR+) - 25 (RRR-) Always 4.4 to 7.0 Ω
      24 (RLR+) - 23 (RLR-) Always 4.4 to 7.0 Ω
      for RHD
      Tester Connection Condition Specified Condition
      37 (SMC1) - 36 (BS1) Always 15.3 to 25.0 Ω
      19 (SMC2) - 20 (BS2) Always 15.3 to 25.0 Ω
      44 (FRA+) - 43 (FRA-) Always 3.6 to 6.0 Ω
      28 (FRR+) - 27 (FRR-) Always 3.6 to 6.0 Ω
      35 (FLA+) - 38 (FLA-) Always 3.6 to 6.0 Ω
      21 (FLR+) - 22 (FLR-) Always 3.6 to 6.0 Ω
      39 (RRA+) - 40 (RRA-) Always 3.6 to 6.0 Ω
      41 (RLA+) - 42 (RLA-) Always 3.6 to 6.0 Ω
      23 (RRR+) - 24 (RRR-) Always 4.4 to 7.0 Ω
      25 (RLR+) - 26 (RLR-) Always 4.4 to 7.0 Ω

    NG
    OK
  2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE ACTUATOR)


    1. Disconnect the A19 and A21 ECU connectors.

      Figure 3. for LHD:

      A001AAVE01

      Figure 4. for RHD:

      A001AAVE02
    2. Disconnect the A27 actuator connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      A19-5 (SMC1) - A27-20 (SMC1) Always Below 1 Ω
      A19-32 (BSO1) - A27-19 (BS1) Always Below 1 Ω
      A19-17 (FRA+) - A27-8 (FRA+) Always Below 1 Ω
      A19-18 (FRA-) - A27-5 (FRA-) Always Below 1 Ω
      A19-4 (FRR+) - A27-22 (FRR+) Always Below 1 Ω
      A19-3 (FRR-) - A27-21 (FRR-) Always Below 1 Ω
      A19-19 (RLA+) - A27-10 (RLA+) Always Below 1 Ω
      A19-20 (RLA-) - A27-9 (RLA-) Always Below 1 Ω
      A19-34 (RLR+) - A27-24 (RLR+) Always Below 1 Ω
      A19-33 (RLR-) - A27-23 (RLR-) Always Below 1 Ω
      A21-6 (SMC2) - A27-6 (SMC2) Always Below 1 Ω
      A21-32 (BSO2) - A27-7 (BS2) Always Below 1 Ω
      A21-17 (FLA+) - A27-13 (FLA+) Always Below 1 Ω
      A21-18 (FLA-) - A27-14 (FLA-) Always Below 1 Ω
      A21-4 (FLR+) - A27-27 (FLR+) Always Below 1 Ω
      A21-3 (FLR-) - A27-28 (FLR-) Always Below 1 Ω
      A21-20 (RRA+) - A27-12 (RRA+) Always Below 1 Ω
      A21-21 (RRA-) - A27-11 (RRA-) Always Below 1 Ω
      A21-34 (RRR+) - A27-26 (RRR+) Always Below 1 Ω
      A21-33 (RRR-) - A27-25 (RRR-) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      A19-5 (SMC1) - A27-37 (SMC1) Always Below 1 Ω
      A19-32 (BSO1) - A27-36 (BS1) Always Below 1 Ω
      A19-17 (FRA+) - A27-44 (FRA+) Always Below 1 Ω
      A19-18 (FRA-) - A27-43 (FRA-) Always Below 1 Ω
      A19-4 (FRR+) - A27-28 (FRR+) Always Below 1 Ω
      A19-3 (FRR-) - A27-27 (FRR-) Always Below 1 Ω
      A19-19 (RLA+) - A27-41 (RLA+) Always Below 1 Ω
      A19-20 (RLA-) - A27-42 (RLA-) Always Below 1 Ω
      A19-34 (RLR+) - A27-25 (RLR+) Always Below 1 Ω
      A19-33 (RLR-) - A27-26 (RLR-) Always Below 1 Ω
      A21-6 (SMC2) - A27-19 (SMC2) Always Below 1 Ω
      A21-32 (BSO2) - A27-20 (BS2) Always Below 1 Ω
      A21-17 (FLA+) - A27-35 (FLA+) Always Below 1 Ω
      A21-18 (FLA-) - A27-38 (FLA-) Always Below 1 Ω
      A21-4 (FLR+) - A27-21 (FLR+) Always Below 1 Ω
      A21-3 (FLR-) - A27-22 (FLR-) Always Below 1 Ω
      A21-20 (RRA+) - A27-39 (RRA+) Always Below 1 Ω
      A21-21 (RRA-) - A27-40 (RRA-) Always Below 1 Ω
      A21-34 (RRR+) - A27-23 (RRR+) Always Below 1 Ω
      A21-33 (RRR-) - A27-24 (RRR-) Always Below 1 Ω
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      A19-5 (SMC1) - Body ground Always 10 kΩ or higher
      A19-32 (BSO1) - Body ground Always 10 kΩ or higher
      A19-17 (FRA+) - Body ground Always 10 kΩ or higher
      A19-18 (FRA-) - Body ground Always 10 kΩ or higher
      A19-4 (FRR+) - Body ground Always 10 kΩ or higher
      A19-3 (FRR-) - Body ground Always 10 kΩ or higher
      A19-19 (RLA+) - Body ground Always 10 kΩ or higher
      A19-20 (RLA-) - Body ground Always 10 kΩ or higher
      A19-34 (RLR+) - Body ground Always 10 kΩ or higher
      A19-33 (RLR-) - Body ground Always 10 kΩ or higher
      A21-6 (SMC2) - Body ground Always 10 kΩ or higher
      A21-32 (BSO2) - Body ground Always 10 kΩ or higher
      A21-17 (FLA+) - Body ground Always 10 kΩ or higher
      A21-18 (FLA-) - Body ground Always 10 kΩ or higher
      A21-4 (FLR+) - Body ground Always 10 kΩ or higher
      A21-3 (FLR-) - Body ground Always 10 kΩ or higher
      A21-20 (RRA+) - Body ground Always 10 kΩ or higher
      A21-21 (RRA-) - Body ground Always 10 kΩ or higher
      A21-34 (RRR+) - Body ground Always 10 kΩ or higher
      A21-33 (RRR-) - Body ground Always 10 kΩ or higher

    NG
    OK
  3. RECONFIRM DTC


    1. Clear the DTC Click here.

    2. Turn the engine switch on (IG).

    3. Check if the same DTCs are recorded Click here.

      Tech Tips

      Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

      Result
      Result Proceed to
      DTCs (C1315/31, C1316/32, C1352/21, C1353/23, C1354/25, C1355/27, C1356/22, C1357/24, C1358/26 and C1359/28) are not output A
      DTCs (C1315/31, C1316/32, C1352/21, C1353/23, C1354/25, C1355/27, C1356/22, C1357/24, C1358/26 and C1359/28) are output B

    A
    B