Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001HG8O
Model Year Start: 2019 Model: RAV4 Prod Date Range: [02/2019 - 12/2021]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C1246,C1281,C1364; Master Cylinder Pressure Sensor; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]

DTC

C1246

Master Cylinder Pressure Sensor

DTC

C1281

Abnormal Output in Master Cylinder Pressure Sensor

DTC

C1364

Wheel Cylinder Pressure Sensor

DESCRIPTION

The regulator pressure sensor and wheel cylinder pressure sensor are built into the brake actuator. They measure their respective pressures and send signals to the skid control ECU (brake booster with master cylinder assembly).

DTC C1281 will be cleared when the regulator pressure sensor sends a regulator pressure signal or when Test Mode ends. DTC C1281 is output only in Test Mode.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1246

Master Cylinder Pressure Sensor

201

202

203

204

207
  • INF Code: 201
    • Sensor supply voltage (VCM1) is 4.75 V or less, or 5.25 V or more for 0.05 seconds.
  • INF Code: 202
    • Regulator pressure sensor output voltage (Preg) is less than 8%, or 90.3% or more (less than 0.4 V, or 4.52 V or more) of sensor supply voltage (VCM1) for 0.05 seconds or more.
  • INF Code: 203
    • When not under braking, the regulator pressure sensor output voltage is 0.2 V or less or 0.88 V or more for 3 seconds or more.
  • INF Code: 204
    • Either of the following is detected:
      1. The regulator pressure sensor output voltage does not correspond with brake pedal stroke sensor assembly and the readings remain out of specification for 0.5 to 5 seconds or more continuously.

        (The brake pedal stroke sensor assembly may be malfunctioning.)

      2. The regulator pressure sensor output voltage does not correspond with wheel cylinder pressure sensor and the outputs remain out of specification for 0.5 to 5 seconds or more continuously.

        (May be output with INF code 424.)

  • INF Code: 207
    • Fluctuation of regulator pressure sensor output is out of specification (the difference between the present value and last value is 15 MPa (153.0 kgf/cm2, 2176 psi) or more) for 0.1 seconds or more.
  • INF Code: 201, 202, 203, 207
    • Brake booster with master cylinder assembly
  • INF Code: 204
    • Brake pedal stroke sensor assembly
    • Brake booster with master cylinder assembly

-

C1281

Abnormal Output in Master Cylinder Pressure Sensor

-

Detected only during Test Mode.
  • Stop light switch assembly
  • Regulator pressure sensor (Brake booster with master cylinder assembly)

-

C1364

Wheel Cylinder Pressure Sensor

421

422

423

424

426
  • INF Code: 421
    • Sensor supply voltage 1 (VCM1) is 4.75 V or less, or 5.25 V or more for 0.05 seconds or more.
  • INF Code: 422
    • Wheel cylinder pressure sensor output voltage (Pfront) is less than 8%, or 90.3% or more (less than 0.4 V, or 4.52 V or more) of sensor supply voltage (VCM1) for 0.05 seconds or more.
  • INF Code: 423
    • When not under braking, the wheel cylinder pressure sensor output voltage is 0.2 V or less or 0.88 V or more for 0.1 to 3 seconds or more.
  • INF Code: 424
    • The wheel cylinder pressure sensor output voltage does not correspond with regulator pressure sensor and the outputs remain out of specification for 0.5 to 5 seconds or more continuously.

      (May be output with INF code 204.)

  • INF Code: 426
    • Fluctuation of wheel cylinder pressure sensor output is out of specification (the difference between the present value and last value is 15 MPa (153.0 kgf/cm2, 2176 psi) or more) for 0.1 seconds or more.

Brake booster with master cylinder assembly

-

DTC Detection Conditions: C1246 INF Code: 204

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

-

-

-

Malfunction Status

The regulator pressure sensor output voltage does not correspond with brake pedal stroke sensor assembly and the readings remain out of specification for 0.5 to 5 seconds or more continuously (The brake pedal stroke sensor assembly may be malfunctioning)

○

-

The regulator pressure sensor output voltage does not correspond with wheel cylinder pressure sensor and the outputs remain out of specification for 0.5 to 5 seconds or more continuously (May be output with INF code 424)

-

○

Detection Time

-

-

Number of Trips

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake booster with master cylinder assembly) or brake actuator (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY

PROCEDURE

1.

CHECK STOP LIGHT SWITCH ASSEMBLY INSTALLATION

(a) Check the protrusion of the plunger.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (EXT): STOP LIGHT SWITCH: INSTALLATION

OK:

The stop light switch assembly is installed properly.

HINT:

If the stop light switch assembly is not installed properly, adjust the protrusion of the plunger before proceeding to the next step.

NG

ADJUST PROTRUSION OF SHAFT

OK

2.

READ VALUE USING TECHSTREAM (REGULATOR PRESSURE SENSOR)

(a) Mount a pedal effort gauge and install LSPV gauges to the rear wheels.

Click here 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; BRAKE SYSTEM (OTHER): BRAKE SYSTEM (w/o Vacuum Brake Booster): ON-VEHICLE INSPECTION

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Select the Data List on the Techstream.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DATA LIST / ACTIVE TEST

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Regulator Pressure Sensor Output

Regulator pressure sensor output

Min.: 0.00 V, Max.: 5.00 V

Brake pedal released: 0.10 to 0.90 V

Reading increases when brake pedal is depressed

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Regulator Pressure Sensor Output

(e) Check the output value of the regulator pressure sensor as the brake pedal is depressed.

Standard Voltage:

Brake Effort

(N (kgf, lbf))

Regulator Pressure Sensor Output

(V)

Rear Right Wheel Hydraulic Pressure

(MPa (kgf/cm2, psi))

Rear Left Wheel Hydraulic Pressure

(MPa (kgf/cm2, psi))

100 (10, 22.5)

1.60 to 2.40

5.33 to 9.33 (54.4 to 95.1, 773 to 1352)

5.33 to 9.33 (54.4 to 95.1, 773 to 1352)

200 (20, 45.0)

3.58 to 4.38

15.06 to 19.06 (153.6 to 194.3, 2184 to 2763)

15.06 to 19.06 (153.6 to 194.3, 2184 to 2763)
NG

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (w/o Vacuum Brake Booster): REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (w/o Vacuum Brake Booster): REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (w/o Vacuum Brake Booster): REMOVAL

OK

3.

READ VALUE USING TECHSTREAM (WHEEL CYLINDER PRESSURE SENSOR)

(a) Install LSPV gauges to the front wheels.

Click here 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; BRAKE SYSTEM (OTHER): BRAKE SYSTEM (w/o Vacuum Brake Booster): ON-VEHICLE INSPECTION

(b) Select the Data List on the Techstream.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DATA LIST / ACTIVE TEST

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Wheel Cylinder Pressure Sensor

Wheel cylinder pressure sensor

Min.: 0.00 V, Max.: 5.00 V

Brake pedal released: 0.10 to 0.90 V

Reading increases when brake pedal is depressed

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Wheel Cylinder Pressure Sensor

(c) Check the output values of the wheel cylinder pressure sensor at each hydraulic pressure during electronically controlled brake system control.

Standard Voltage:

for Front Wheel Cylinder LH

Hydraulic Pressure

(MPa (kgf/cm2, psi))

Wheel Cylinder Pressure Sensor

(V)

2.0 (20.4, 290)

0.53 to 1.33

5.0 (51.0, 725)

1.12 to 1.92

7.0 (71.4, 1015)

1.52 to 2.32

10.0 (102.0, 1451)

2.14 to 2.94

for Front Wheel Cylinder RH

Hydraulic Pressure

(MPa (kgf/cm2, psi))

Wheel Cylinder Pressure Sensor

(V)

2.0 (20.4, 290)

0.53 to 1.33

5.0 (51.0, 725)

1.12 to 1.92

7.0 (71.4, 1015)

1.52 to 2.32

10.0 (102.0, 1451)

2.14 to 2.94
NG

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (w/o Vacuum Brake Booster): REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (w/o Vacuum Brake Booster): REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (w/o Vacuum Brake Booster): REMOVAL

OK

4.

READ VALUE USING TECHSTREAM (BRAKE PEDAL STROKE SENSOR ASSEMBLY AND PRESSURE SENSOR COMPARISON)

(a) Mount a pedal effort gauge and install LSPV gauges to the front and rear wheels.

Click here 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; BRAKE SYSTEM (OTHER): BRAKE SYSTEM (w/o Vacuum Brake Booster): ON-VEHICLE INSPECTION

(b) Select the Data List on the Techstream.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DATA LIST / ACTIVE TEST

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Regulator Pressure Sensor Output

Regulator pressure sensor output

Min.: 0.00 V, Max.: 5.00 V

Brake pedal released: 0.10 to 0.90 V

Reading increases when brake pedal is depressed

Stroke Sensor

Brake pedal stroke sensor assembly

Min.: 0.00 V, Max.: 5.00 V

Brake pedal released: 0.65 to 1.35 V

Reading increases when brake pedal is depressed

Stroke Sensor2

Brake pedal stroke sensor assembly 2

Min.: 0.00 V, Max.: 5.00 V

Brake pedal released: 3.65 to 4.35 V

Reading decreases when brake pedal is depressed

Wheel Cylinder Pressure Sensor

Wheel cylinder pressure sensor

Min.: 0.00 V, Max.: 5.00 V

Brake pedal released: 0.10 to 0.90 V

Reading increases when brake pedal is depressed

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Regulator Pressure Sensor Output

Stroke Sensor

Stroke Sensor2

Wheel Cylinder Pressure Sensor

(c) Check the output value of the brake pedal stroke sensor assembly as the brake pedal is depressed.

Standard Voltage:

Brake Effort

(N (kgf, lbf))

Stroke Sensor

(V)

Stroke Sensor2

(V)

Regulator Pressure Sensor Output

(V)

Wheel Cylinder Pressure Sensor

(V)

100 (10, 22.5)

1.66 to 2.36

2.64 to 3.34

1.60 to 2.40

1.38 to 2.18

200 (20, 45.0)

1.95 to 2.65

2.35 to 3.05

3.58 to 4.38

3.07 to 3.87
NG

REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY

OK

5.

RECONFIRM DTC

(a) Clear the DTCs.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the ignition switch off.

(c) Perform a road test.

(d) Check if the same DTC is output.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTCs C1246 and C1364 are not output.

A

DTCs C1246 and/or C1364 are output.

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (w/o Vacuum Brake Booster): REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (w/o Vacuum Brake Booster): REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (w/o Vacuum Brake Booster): REMOVAL