ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1247/47,C1346/71 and C1392/48

DTC Code DTC Name
C1247/47 Stroke Sensor Malfunction
C1346/71 Stroke Sensor Zero Point Learning Malfunction (Test Mode DTC)
C1392/48 Stroke Sensor Zero Point Calibration Undone

DESCRIPTION

The brake pedal stroke sensor assembly sends a signal about the pedal stroke to the skid control ECU (brake booster with master cylinder assembly).

DTC C1346/71 will be cleared when the brake pedal stroke sensor assembly sends a brake pedal stroke sensor assembly signal or when Test Mode ends. DTC C1346/71 is output only in Test Mode.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1247/47

Stroke Sensor Malfunction

211

212

213

214

215

216

217

218

219

220

221

222

223

  • INF Code: 211

    • Sensor supply voltage (VCM1) is 4.75 V or less, or 5.25 V or more for 0.2 seconds or more.

  • INF Code: 212

    • Sensor output voltage 1 (SKS1) is less than 5.5%, or 94% or more (less than 0.27 V, or 4.7 V or more) of sensor supply voltage (VCM1) for 0.2 seconds or more.

  • INF Code: 213

    • Sensor output voltage 2 (SKS2) is less than 5.5%, or 94% or more (less than 0.27 V, or 4.7 V or more) of sensor supply voltage (VCSK) for 0.2 seconds or more.

  • INF Code: 214

    • Either of the following is detected:

      1. Fluctuation of sensor output 1 (SKS1) is out of specification.

      2. The difference between the present value and last value of sensor output voltage 1 (SKS1) is 8.5% or more (0.43 V or more) of sensor supply voltage (VCM1) for 0.2 seconds or more.

  • INF Code: 215

    • Either of the following is detected:

      1. Fluctuation of sensor output 2 (SKS2) is out of specification.

      2. The difference between the present value and last value of the sensor output voltage 2 (SKS2) is 8.5% or more (0.43 V or more) of the sensor supply voltage (VCM1) for 0.2 seconds or more.

  • INF Code: 216

    • Either of the following is detected:

      1. Pedal off position (zero point stored value) is out of specification.

      2. The zero point stored value for the sensor output voltage 1 (SKS1) is deviates -17% to 25.9% (0.15 to 2.3 V) or more from the theoretical value.

  • INF Code: 217

    • Either of the following is detected:

      1. Pedal off position (zero point stored value) is out of specification.

      2. The zero point stored value for the sensor output voltage 2 (SKS2) deviates -31.7% to 17% (2.42 to 4.85 V) or more from the theoretical value.

  • INF Code: 218

    • An excessive difference between the change in sensor output 1 (SKS1) and sensor output 2 (SKS2) is detected for 0.2 seconds or more.

  • INF Code: 219

    • Sensor data is invalid for 0.2 seconds or more.

      (Skid control ECU (Brake booster with master cylinder assembly) internal monitor circuit malfunction.)

  • INF Code: 220

    • The sum of sensor output voltage 1 (SKS1) and sensor output voltage 2 (SKS2) deviates 15% or more from the theoretical value 5 V.

  • INF Code: 221

    • An excessive difference exists between the variation in sensor output voltage 1 (SKS1) and sensor output voltage 2 (SKS2).

  • INF Code: 222

    • Sensor power source voltage (VCM1) remains at 4.75 V or less or 5.25 V or more and the sensor data is invalid for 0.2 seconds or longer.

  • INF Code: 223

    • Sensor data is invalid for 0.2 seconds or more.

      (Open, short or noise.)

  • INF Code: 211

    • Open or short in brake pedal stroke sensor assembly power supply circuit

    • Improperly connected connector, deformation or corrosion of terminals

    • Skid control ECU (Brake booster with master cylinder assembly)

  • INF Code: 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223

    • Open or short in wire harness

    • Improperly connected connector, deformation or corrosion of terminals

    • Brake pedal stroke sensor assembly

Electronically controlled brake system DTC

C1346/71

Stroke Sensor Zero Point Learning Malfunction (Test Mode DTC)

-

Detected only during Test Mode.

  • Brake pedal stroke sensor assembly

  • Brake pedal stroke sensor assembly circuit

Electronically controlled brake system Test Mode DTC

C1392/48

Stroke Sensor Zero Point Calibration Undone

-

Zero point calibration of brake pedal stroke sensor assembly is unfinished.

  • Brake pedal stroke sensor zero point calibration incomplete (Initialization and calibration of linear solenoid valve incomplete)

  • Skid control ECU (Brake booster with master cylinder assembly)

Electronically controlled brake system DTC

WIRING DIAGRAM

C235540E55

CAUTION / NOTICE / HINT

Note:

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

Click here

Tip:

Check the condition of each related circuit connector before troubleshooting.

Click here

PROCEDURE

  1. CHECK BRAKE PEDAL

    1. Check that the brake pedal and the brake pedal stroke sensor assembly are properly installed and that the pedal can be depressed normally.

    2. Check and adjust the brake pedal height.

      for LHD:Click here

      for RHD:Click here

    3. Adjust the brake pedal stroke sensor assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  2. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE PEDAL STROKE SENSOR ASSEMBLY)

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

    2. Disconnect the A110 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Disconnect the A105 brake pedal stroke sensor assembly connector.

    4. Check both the connector case and the terminal for deformation and corrosion.

      OK

      No deformation or corrosion.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A110-39 (VCSK) - A105-3 (VCSK)

      Always

      Below 1 Ω

      A110-39 (VCSK) or A105-3 (VCSK) - Body ground

      Always

      10 kΩ or higher

      A110-41 (SKG) - A105-1 (SKG)

      Always

      Below 1 Ω

      A110-41 (SKG) or A105-1 (SKG) - Body ground

      Always

      10 kΩ or higher

      A110-42 (SKS) - A105-4 (SKS1)

      Always

      Below 1 Ω

      A110-42 (SKS) or A105-4 (SKS1) - Body ground

      Always

      10 kΩ or higher

      A110-40 (SKS2) - A105-2 (SKS2)

      Always

      Below 1 Ω

      A110-40 (SKS2) or A105-2 (SKS2) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SENSOR OUTPUT)

    1. C234579C33

      *a

      Front view of wire harness connector

      (to Brake Pedal Stroke Sensor Assembly)

      Reconnect the A110 skid control ECU (brake booster with master cylinder assembly) connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      A105-3 (VCSK) - A105-1 (SKG)

      Power switch on (IG)

      4.84 to 5.16 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY

    Click here

    NG

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

    for LHD:Click here

    for RHD:Click here