ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1246/46, C1364/61

DTC Code DTC Name
C1246/46 Master Cylinder Pressure Sensor Malfunction
C1364/61 Wheel Cylinder Pressure Sensor Malfunction

DESCRIPTION

The master cylinder pressure sensors and wheel cylinder pressure sensors are built into the brake actuator assembly. They measure their respective pressures and send signals to the skid control ECU assembly.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1246/46 Master Cylinder Pressure Sensor Malfunction

-

191

192

194

195

197

198

199

200

201

202

205

206

  • INF Code: -


    • Master cylinder pressure sensor has a fluctuation of 15 MPa (153 kgf/cm2, 2176 psi) or more continuously for 0.054 seconds within a 0.6 second interval.

  • INF Code: 191


    • Sensor supply voltage 1 (VCM) is 4.7 V or less or 5.3 V or more for 0.05 seconds or more.

  • INF Code: 192


    • Master cylinder pressure sensor output voltage 1 (PMC1) is 0.25 V or less or 4.53 V or more for 0.05 seconds or more.

  • INF Code: 194


    • Sensor supply voltage 2 (VCM2) is 4.7 V or less or 5.3 V or more for 0.05 seconds or more.

  • INF Code: 195


    • Master cylinder pressure sensor output voltage 2 (PMC2) is 0.25 V or less or 4.53 V or more for 0.05 seconds or more.

  • INF Code: 197


    • Master cylinder pressure sensor output voltage 1 (PMC1) malfunction.

  • INF Code: 198


    • Master cylinder pressure sensor output voltage 2 (PMC2) malfunction.

  • INF Code: 199


    • When not under braking, the master cylinder pressure sensor output voltage 1 (PMC1) is 0.33 V or less or 0.85 V or more.

  • INF Code: 200


    • When not under braking, the master cylinder pressure sensor output voltage 2 (PMC2) is 0.33 V or less or 0.85 V or more.

  • INF Code: 201


    • PMC1 and PMC2 voltages are different when braking.

  • INF Code: 202


    • Condition in which the output voltage of front wheel cylinder pressure sensor RH (PFR) and rear wheel cylinder pressure sensor LH (PRL) is 0.25 V or less or 4.53 V or more continues for 0.05 seconds or more.

  • INF Code: 205


    • Condition in which the output voltage of front wheel cylinder pressure sensor LH (PFL) and rear wheel cylinder pressure sensor RH (PRR) is 0.25 V or less or 4.53 V or more continues for 0.05 seconds or more.

  • INF Code: 206


    • Both master cylinder pressure sensor output 1 (PMC1) and master cylinder pressure sensor output 2 (PMC2) power supply voltage are abnormal and 0.2 seconds or more continuously.

  • INF Code: 191, 194


    • Open or short in master cylinder pressure sensor power supply circuit

    • Improperly connected connector, deformation or corrosion of terminals

    • Brake actuator assembly

    • Skid control ECU assembly

  • INF Code: -, 192, 195, 206


    • Open or short in wire harness

    • Improperly connected connector, deformation or corrosion of terminals

    • Brake actuator assembly

    • Skid control ECU assembly

  • INF Code: 197, 198


    • Brake actuator assembly

    • Skid control ECU assembly

  • INF Code: 199, 200


    • Open or short in wire harness

    • Improperly connected connector, deformation or corrosion of terminals

    • Stop light switch assembly input

    • Brake actuator assembly

    • Skid control ECU assembly

  • INF Code: 201


    • Open or short in wire harness

    • Improperly connected connector, deformation or corrosion of terminals

    • Brake actuator assembly

    • Skid control ECU assembly

    • brake master cylinder sub-assembly

  • INF Code: 202, 205


    • Open or short in master cylinder pressure sensor power supply circuit

    • Brake actuator assembly

    • Skid control ECU assembly

 Electronically controlled brake system DTC
C1364/61 Wheel Cylinder Pressure Sensor Malfunction

-

221

222

224

225

227

228

230

231

233

234

236

237

239

240

242

243

  • INF Code: -


    • Master cylinder pressure sensor has a fluctuation of 15 MPa (153 kgf/cm2, 2176 psi) or more continuously for 0.054 seconds within a 0.6 second interval.

  • INF Code: 221


    • Sensor supply voltage 1 (VCM1) is 4.7 V or less or 5.3 V or more for 0.05 seconds or more.

  • INF Code: 222


    • Output voltage of front wheel cylinder pressure sensor RH (PFR) is 0.25 V or less or 4.53 V or more for 0.05 seconds or more.

  • INF Code: 224


    • Either of the following is detected:


      1. When not under braking, the output voltage of front wheel cylinder pressure sensor RH (PFR) is 0.33 V or less or 0.85 V or more for 3 seconds or more.

      2. When under braking, the output voltage of front wheel cylinder pressure sensor RH (PFR) is 0.33 V or less for 0.1 seconds or more.

  • INF Code: 225


    • Output voltage of front wheel cylinder pressure sensor RH (PFR) is stuck at 4.53 V or less.

  • INF Code: 227


    • Sensor supply voltage 2 (VCM2) is 4.7 V or less or 5.3 V or more for 0.05 seconds or more.

  • INF Code: 228


    • Output voltage of front wheel cylinder pressure sensor LH (PFL) is 0.25 V or less or 4.53 V or more for 0.05 seconds or more.

  • INF Code: 230


    • Either of the following is detected:


      1. When not under braking, the output voltage of front wheel cylinder pressure sensor LH (PFL) is 0.33 V or less or 0.85 V or more for 3 seconds or more.

      2. When under braking, the output voltage of front wheel cylinder pressure sensor LH (PFL) is 0.33 V or less for 0.1 seconds or more.

  • INF Code: 231


    • Output voltage of front wheel cylinder pressure sensor LH (PFL) is stuck at 4.53 V or less.

  • INF Code: 233


    • Sensor supply voltage 2 (VCM2) is 4.7 V or less or 5.3 V or more for 0.05 seconds or more.

  • INF Code: 234


    • Output voltage of rear wheel cylinder pressure sensor RH (PRR) is 0.25 V or less or 4.53 V or more for 0.05 seconds or more.

  • INF Code: 236


    • Either of the following is detected:


      1. When not under braking, the output voltage of rear wheel cylinder pressure sensor RH (PRR) is 0.33 V or less or 0.85 V or more for 3 seconds or more.

      2. When under braking, the output voltage of rear wheel cylinder pressure sensor RH (PRR) is 0.33 V or less for 0.1 seconds or more.

  • INF Code: 237


    • Output voltage of rear wheel cylinder pressure sensor RH (PRR) is stuck at 4.53 V or less.

  • INF Code: 239


    • Sensor supply voltage 1 (VCM1) is 4.7 V or less or 5.3 V or more for 0.05 seconds or more.

  • INF Code: 240


    • Output voltage of rear wheel cylinder pressure sensor LH (PRL) is 0.25 V or less or 4.53 V or more for 0.05 seconds or more.

  • INF Code: 242


    • Either of the following is detected:


      1. When not under braking, the output voltage of rear wheel cylinder pressure sensor LH (PRL) is 0.33 V or less or 0.85 V or more for 3 seconds or more.

      2. When under braking, the output voltage of rear wheel cylinder pressure sensor LH (PRL) is 0.33 V or less for 0.1 seconds or more.

  • INF Code: 243


    • Output voltage of rear wheel cylinder pressure sensor LH (PRL) is stuck at 4.53 V or less.

  • INF Code: 221, 227, 233, 239


    • Open or short in wheel cylinder pressure sensor power supply circuit

    • Brake actuator assembly

    • Skid control ECU assembly

  • INF Code: -, 222, 224, 225, 228, 230, 231, 234, 236, 237, 240, 242, 243


    • Open or short in wire harness

    • Improperly connected connector, deformation or corrosion of terminals

    • 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
C1246 46 42 45 21
C1364 61 42 45 21

WIRING DIAGRAM

Figure 1. for RHD:

B004AFAE09

Figure 2. for LHD:

B004AFAE10

CAUTION / NOTICE / HINT

Note

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

Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)


    1. Turn the power switch off.

    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

    3. Disconnect the A11 and A8 skid control ECU assembly connectors.

    4. Disconnect the A7 brake actuator assembly connector.

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

      Standard Resistance
      for RHD:
      Tester Connection Condition Specified Condition
      A8-9 (VCM) - A7-35 (VCM) Always Below 1 Ω
      A8-9 (VCM) or A7-35 (VCM) - Body ground Always 10 kΩ or higher
      A8-21 (PAC1) - A7-46 (PAC1) Always Below 1 Ω
      A8-21 (PAC1) or A7-46 (PAC1) - Body ground Always 10 kΩ or higher
      A8-30 (PMC1) - A7-38 (PMC1) Always Below 1 Ω
      A8-30 (PMC1) or A7-38 (PMC1) - Body ground Always 10 kΩ or higher
      A8-32 (PFR) - A7-34 (PFR) Always Below 1 Ω
      A8-32 (PFR) or A7-34 (PFR) - Body ground Always 10 kΩ or higher
      A8-18 (PRL) - A7-36 (PRL) Always Below 1 Ω
      A8-18 (PRL) or A7-36 (PRL) - Body ground Always 10 kΩ or higher
      A8-8 (E) - A7-45 (E) Always Below 1 Ω
      A8-8 (E) or A7-45 (E) - Body ground Always 10 kΩ or higher
      A8-31 (PCK1) - A7-37 (PCK1) Always Below 1 Ω
      A8-31 (PCK1) or A7-37 (PCK1) - Body ground Always 10 kΩ or higher
      A11-16 (VCM2) - A7-40 (VCM2) Always Below 1 Ω
      A11-16 (VCM2) or A7-40 (VCM2) - Body ground Always 10 kΩ or higher
      A11-28 (PMC2) - A7-43 (PMC2) Always Below 1 Ω
      A11-28 (PMC2) or A7-43 (PMC2) - Body ground Always 10 kΩ or higher
      A11-23 (PFL) - A7-39 (PFL) Always Below 1 Ω
      A11-23 (PFL) or A7-39 (PFL) - Body ground Always 10 kΩ or higher
      A11-24 (PRR) - A7-41 (PRR) Always Below 1 Ω
      A11-24 (PRR) or A7-41 (PRR) - Body ground Always 10 kΩ or higher
      A11-15 (E2) - A7-44 (E2) Always Below 1 Ω
      A11-15 (E2) or A7-44 (E2) - Body ground Always 10 kΩ or higher
      A11-29 (PCK2) - A7-42 (PCK2) Always Below 1 Ω
      A11-29 (PCK2) or A7-42 (PCK2) - Body ground Always 10 kΩ or higher
      for LHD:
      Tester Connection Condition Specified Condition
      A8-9 (VCM) - A7-10 (VCM) Always Below 1 Ω
      A8-9 (VCM) or A7-10 (VCM) - Body ground Always 10 kΩ or higher
      A8-21 (PAC1) - A7-15 (PAC1) Always Below 1 Ω
      A8-21 (PAC1) or A7-15 (PAC1) - Body ground Always 10 kΩ or higher
      A8-30 (PMC1) - A7-13 (PMC1) Always Below 1 Ω
      A8-30 (PMC1) or A7-13 (PMC1) - Body ground Always 10 kΩ or higher
      A8-32 (PFR) - A7-9 (PFR) Always Below 1 Ω
      A8-32 (PFR) or A7-9 (PFR) - Body ground Always 10 kΩ or higher
      A8-18 (PRL) - A7-11 (PRL) Always Below 1 Ω
      A8-18 (PRL) or A7-11 (PRL) - Body ground Always 10 kΩ or higher
      A8-8 (E) - A7-14 (E) Always Below 1 Ω
      A8-8 (E) or A7-14 (E) - Body ground Always 10 kΩ or higher
      A8-31 (PCK1) - A7-12 (PCK1) Always Below 1 Ω
      A8-31 (PCK1) or A7-12 (PCK1) - Body ground Always 10 kΩ or higher
      A11-16 (VCM2) - A7-5 (VCM2) Always Below 1 Ω
      A11-16 (VCM2) or A7-5 (VCM2) - Body ground Always 10 kΩ or higher
      A11-28 (PMC2) - A7-8 (PMC2) Always Below 1 Ω
      A11-28 (PMC2) or A7-8 (PMC2) - Body ground Always 10 kΩ or higher
      A11-23 (PFL) - A7-4 (PFL) Always Below 1 Ω
      A11-23 (PFL) or A7-4 (PFL) - Body ground Always 10 kΩ or higher
      A11-24 (PRR) - A7-6 (PRR) Always Below 1 Ω
      A11-24 (PRR) or A7-6 (PRR) - Body ground Always 10 kΩ or higher
      A11-15 (E2) - A7-16 (E2) Always Below 1 Ω
      A11-15 (E2) or A7-16 (E2) - Body ground Always 10 kΩ or higher
      A11-29 (PCK2) - A7-7 (PCK2) Always Below 1 Ω
      A11-29 (PCK2) or A7-7 (PCK2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. READ VALUE USING GTS (MASTER CYLINDER PRESSURE SENSOR, WHEEL CYLINDER PRESSURE SENSOR)


    1. Reconnect the A11 and A8 skid control ECU assembly connectors.

    2. Reconnect the A7 brake actuator assembly connector.

    3. Connect the GTS to the DLC3.

    4. Turn the power switch on (IG).

    5. Select the Data List on the GTS.

      Click here


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Master Cylinder Sensor Master cylinder pressure sensor 1 Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      Master Cylinder Sensor2 Master cylinder pressure sensor 2 Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      FR W/C Sensor Front wheel cylinder pressure sensor RH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      FL W/C Sensor Front wheel cylinder pressure sensor LH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      RR W/C Sensor Rear wheel cylinder pressure sensor RH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      RL W/C Sensor Rear wheel cylinder pressure sensor LH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      Master Cylinder Sensor
      Master Cylinder Sensor2
      FR W/C Sensor
      FL W/C Sensor
      RR W/C Sensor
      RL W/C Sensor

    6. Without operating the brake pedal, check the master cylinder sensor (PMC1), master cylinder sensor2 (PMC2), FR W/C sensor (PFR), FL W/C sensor (PFL), FL W/C sensor (PFL), RR W/C sensor (PRR) and RL W/C sensor (PRL).

      Standard voltage
      0.33 to 0.85 V
      Result
      Result Proceed to
      OK A
      Any single sensor is NG B
      Either master cylinder pressure sensor 1 system (master cylinder sensor (PMC1), FR W/C sensor (PFR), RL W/C sensor (PRL)) or master cylinder pressure sensor 2 system (master cylinder sensor2 (PMC2), FL W/C sensor (PFL), RR W/C sensor (PRR), or all NG C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here

    C

    GO TO STEP 9 Click here

    A

  3. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the power switch off.

      Result
      Proceed to
      NEXT

    NEXT

  4. READ VALUE USING GTS (MASTER CYLINDER PRESSURE SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the Data List on the GTS.

      Click here


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Master Cylinder Sensor Master cylinder pressure sensor 1 Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      Master Cylinder Sensor2 Master cylinder pressure sensor 2 Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      ECB Solenoid (SMC1) Master cut solenoid (SMC1) ON or OFF

      ON: Solenoid on (valve closed)

      OFF: Solenoid off (valve open)

      		 ECB: Electronically Controlled Brake System
      ECB Solenoid (SMC2) Master cut solenoid (SMC2) ON or OFF

      ON: Solenoid on (valve closed)

      OFF: Solenoid off (valve open)

      		 ECB: Electronically Controlled Brake System

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      Master Cylinder Sensor
      Master Cylinder Sensor2
      ECB Solenoid (SMC1)
      ECB Solenoid (SMC2)

      • ECB: Electronically Controlled Brake System

    4. Check the output value of the master cylinder pressure sensor as the brake pedal is depressed.

      OK
      Output voltage is proportional to pedal stroke, and there is not a large difference in output between sensor 1 and sensor 2.

      Tech Tips


      • If DTCs are stored due to the brake pedal being depressed, and electronically controlled brake system control is prohibited, check the Freeze Frame Data recorded at the time the DTCs were stored.

      • If the Freeze Frame Data shows that there are no abnormalities in the output of the master cylinder pressure sensors and difference in the output between sensor 1 and sensor 2, proceed to the next step.

      Result
      Proceed to
      OK
      NG

    NG

    READ VALUE USING GTS (WHEEL CYLINDER PRESSURE SENSOR) Click here

    OK

  5. READ VALUE USING GTS (WHEEL CYLINDER PRESSURE SENSOR)


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the power switch off.

    3. Connect an LSPV gauge set.

    4. Turn the power switch on (IG).

    5. Select the Data List on the GTS.

      Click here


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR W/C Sensor Front wheel cylinder pressure sensor RH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      FL W/C Sensor Front wheel cylinder pressure sensor LH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      RR W/C Sensor Rear wheel cylinder pressure sensor RH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      RL W/C Sensor Rear wheel cylinder pressure sensor LH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      FR W/C Sensor
      FL W/C Sensor
      RR W/C Sensor
      RL W/C Sensor

    6. Check the output values of the wheel cylinder pressure sensor at each hydraulic pressure level during the electronically controlled brake system control.

      Standard Voltage
      for Front Wheel Cylinder

      Hydraulic Pressure

      MPa (kgf/cm2, psi)

      FR W/C Sensor

      (Tester Display)

      FL W/C Sensor

      (Tester Display)
      1.76(17.9, 255) 0.66 to 1.06 V 0.66 to 1.06 V
      5.22(53.2, 757) 1.37 to 1.77 V 1.37 to 1.77 V
      for Rear Wheel Cylinder

      Hydraulic Pressure

      MPa (kgf/cm2, psi)

      RR W/C Sensor

      (Tester Display)

      RL W/C Sensor

      (Tester Display)
      1.76(17.9, 255) 0.66 to 1.06 V 0.66 to 1.06 V
      5.22(53.2, 757) 1.37 to 1.77 V 1.37 to 1.77 V

      Tech Tips


      • If DTCs are stored due to the brake pedal being depressed, and electronically controlled brake system control is prohibited, check the Freeze Frame Data recorded at the time the DTCs were stored.

      • If the Freeze Frame Data shows that there are no abnormalities in the output of the wheel cylinder pressure sensors, proceed to the next step.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here

    OK

  6. CHECK BRAKE MASTER CYLINDER SUB-ASSEMBLY AND MASTER CYLINDER PRESSURE SENSOR


    1. Perform the Active Test "ECB Control Invalid".


      • ECB: Electronically Controlled Brake System

      Click here


      Chassis > ABS/VSC/TRC > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      ECB Control Invalid Electronically controlled brake system control invalid Control invalid ON/OFF

      • Electronically controlled brake system control is disabled (braking with no accumulator assist)

      • ECB: Electronically Controlled Brake System

    2. Depress the brake pedal and check the output value for the master cylinder sensor and FR W/C sensor, and the master cylinder2 and FL W/C sensor.


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Master Cylinder Sensor Master cylinder pressure sensor 1 Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      Master Cylinder Sensor2 Master cylinder pressure sensor 2 Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      FR W/C Sensor Front wheel cylinder pressure sensor RH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      FL W/C Sensor Front wheel cylinder pressure sensor LH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed

      Chassis > ABS/VSC/TRC > Active Test
      Active Test Display
      ECB Control Invalid
      Data List Display
      Master Cylinder Sensor
      Master Cylinder Sensor2
      FR W/C Sensor
      FL W/C Sensor

      • ECB: Electronically Controlled Brake System

      OK
      When FR W/C sensor is 1.0 V, master cylinder sensor is 1.5 to 1.9 V
      When FL W/C sensor is 1.0 V, master cylinder sensor2 is 1.5 to 1.9 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here

    OK

  7. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the power switch off.

      Result
      Proceed to
      NEXT

    NEXT

  8. RECONFIRM DTC


    1. Turn the power switch on (READY).

    2. Perform a drive test and braking test.

    3. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTCs C1246/46 or C1364/61 are output. A
      DTCs C1246/46 and C1364/61 are not output. B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  9. CHECK FREEZE FRAME DATA


    1. Check the INF Code (Information Code) from the freeze frame data when a DTC is stored.

      Result
      Result Proceed to
      Sensor power supply malfunction INF Code (191, 194, 221, 227, 233, 239) output A
      Sensor output malfunction INF Code output B

    A

    REPLACE SKID CONTROL ECU ASSEMBLY for RHD: Click here
    REPLACE SKID CONTROL ECU ASSEMBLY for LHD: Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here

  10. READ VALUE USING GTS (WHEEL CYLINDER PRESSURE SENSOR)


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the power switch off.

    3. Connect an LSPV gauge set.

    4. Turn the power switch on (IG).

    5. Select the Data List on the GTS.

      Click here


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR W/C Sensor Front wheel cylinder pressure sensor RH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      FL W/C Sensor Front wheel cylinder pressure sensor LH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      RR W/C Sensor Rear wheel cylinder pressure sensor RH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      RL W/C Sensor Rear wheel cylinder pressure sensor LH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      FR W/C Sensor
      FL W/C Sensor
      RR W/C Sensor
      RL W/C Sensor

    6. Check the output values of the wheel cylinder pressure sensor at each hydraulic pressure level during the electronically controlled brake system control.

      Standard Voltage
      for Front Wheel Cylinder

      Hydraulic Pressure

      MPa (kgf/cm2, psi)

      FR W/C Sensor

      (Tester Display)

      FL W/C Sensor

      (Tester Display)
      1.76(17.9, 255) 0.66 to 1.06 V 0.66 to 1.06 V
      5.22(53.2, 757) 1.37 to 1.77 V 1.37 to 1.77 V
      for Rear Wheel Cylinder

      Hydraulic Pressure

      MPa (kgf/cm2, psi)

      RR W/C Sensor

      (Tester Display)

      RL W/C Sensor

      (Tester Display)
      1.76(17.9, 255) 0.66 to 1.06 V 0.66 to 1.06 V
      5.22(53.2, 757) 1.37 to 1.77 V 1.37 to 1.77 V

      Tech Tips


      • If DTCs are stored due to the brake pedal being depressed, and electronically controlled brake system control is prohibited, check the Freeze Frame Data recorded at the time the DTCs were stored.

      • If the Freeze Frame Data shows that there are no abnormalities in the output of the wheel cylinder pressure sensors, proceed to the next step.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here

    OK

  11. CHECK BRAKE MASTER CYLINDER SUB-ASSEMBLY AND MASTER CYLINDER PRESSURE SENSOR


    1. Perform the Active Test "ECB Control Invalid".


      • ECB: Electronically Controlled Brake System

      Click here


      Chassis > ABS/VSC/TRC > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      ECB Control Invalid Electronically controlled brake system control invalid Control invalid ON/OFF

      • Electronically controlled brake system control is disabled (braking with no accumulator assist)

      • ECB: Electronically Controlled Brake System

    2. Depress the brake pedal and check the output value for the master cylinder sensor and FR W/C sensor, and the master cylinder2 and FL W/C sensor.


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Master Cylinder Sensor Master cylinder pressure sensor 1 Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      Master Cylinder Sensor2 Master cylinder pressure sensor 2 Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      FR W/C Sensor Front wheel cylinder pressure sensor RH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed
      FL W/C Sensor Front wheel cylinder pressure sensor LH Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.30 to 0.70 V Reading increases when brake pedal is depressed

      Chassis > ABS/VSC/TRC > Active Test
      Active Test Display
      ECB Control Invalid
      Data List Display
      Master Cylinder Sensor
      Master Cylinder Sensor2
      FR W/C Sensor
      FL W/C Sensor

      • ECB: Electronically Controlled Brake System

      OK
      When FR W/C sensor is 1.0 V, master cylinder sensor is 1.5 to 1.9 V
      When FL W/C sensor is 1.0 V, master cylinder sensor2 is 1.5 to 1.9 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BRAKE MASTER CYLINDER SUB-ASSEMBLY for RHD: Click here
    REPLACE BRAKE MASTER CYLINDER SUB-ASSEMBLY for LHD: Click here

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here