DTC    C1247/47    Stroke Sensor Malfunction

DTC    C1346/71    Stroke Sensor Zero Point Learning Malfunction (Test Mode DTC)

DTC    C1392/48    Stroke Sensor Zero Point Calibration Undone

for Preparation Click here


DESCRIPTION

The stroke sensor inputs the pedal stroke into the skid control ECU.
DTC C1346/71 will be cleared when the brake pedal stroke sensor sends a stroke sensor signal or when Test Mode ends. DTC C1346/71 is output only in Test Mode.

DTC Code
INF Code
DTC Detection Condition
Trouble Area
C1247/47
211
Sensor supply voltage (VCM1) is 4.75 V or less, or 5.25 V or more for 0.2 seconds or more.
  1. Open or short in brake pedal stroke sensor power supply circuit
  2. Improperly connected connector, deformation or corrosion of terminals
  3. Brake booster with master cylinder (Skid control ECU)
↑
212
Sensor output voltage 1 (SKS1) is less than 5.5%, or 94% or more (less than 0.15 V, or 4.85 V or more) of sensor supply voltage (VCM1) for 0.2 seconds or more.
  1. Open or short in wire harness
  2. Improperly connected connector, deformation or corrosion of terminals
  3. Brake pedal stroke sensor
↑
213
Sensor output voltage 2 (SKS2) is less than 5.5%, or 94% or more (less than 0.15 V, or 4.85 V or more) of sensor supply voltage (VCSK) for 0.2 seconds or more.
↑
↑
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.
↑
↑
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.
↑
↑
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.
↑
↑
219
Sensor data is invalid for 0.2 seconds or more.
(Skid control ECU internal monitor circuit malfunction.)
↑
↑
223
Sensor data is invalid for 0.2 seconds or more.
(Open, short, or noise.)
↑
C1392/48
-
Zero point calibration of stroke sensor is unfinished.
  1. Brake pedal stroke sensor zero point calibration incomplete (Initialization and calibration of linear solenoid valve incomplete)
  2. Brake booster with master cylinder (Skid control ECU)
C1346/71
-
Detected only during Test Mode.
  1. Brake pedal stroke sensor
  2. Brake pedal stroke sensor circuit

WIRING DIAGRAM


C235540E02


INSPECTION PROCEDURE

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

HINT:
Check the condition of each related circuit connector before troubleshooting (Click here).

1.CHECK BRAKE PEDAL

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

  1. Check and adjust the brake pedal height (Click here for LHD or Click here for RHD).

  1. Adjust the brake pedal stroke sensor (Click here for LHD or Click here for RHD).


NEXT


2.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE PEDAL STROKE SENSOR)

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

  1. Disconnect the skid control ECU connector and the brake pedal stroke sensor connector.

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

    OK:
    No deformation or corrosion.

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

    Standard Resistance:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    A61-39 (VCSK) - A29-3 (VCSK)
    		Always
    		Below 1 Ω
    A61-39 (VCSK) - Body ground
    		Always
    		10 kΩ or higher
    A61-41 (SKG) - A29-1 (SKG)
    		Always
    		Below 1 Ω
    A61-41 (SKG) - Body ground
    		Always
    		10 kΩ or higher
    A61-42 (SKS) - A29-4 (SKS1)
    		Always
    		Below 1 Ω
    A61-42 (SKS) - Body ground
    		Always
    		10 kΩ or higher
    A61-40 (SKS2) - A29-2 (SKS2)
    		Always
    		Below 1 Ω
    A61-40 (SKS2) - Body ground
    		Always
    		10 kΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    A61-39 (VCSK) - A29-3 (VCSK)
    		Always
    		Below 1 Ω
    A61-39 (VCSK) - Body ground
    		Always
    		10 kΩ or higher
    A61-41 (SKG) - A29-1 (SKG)
    		Always
    		Below 1 Ω
    A61-41 (SKG) - Body ground
    		Always
    		10 kΩ or higher
    A61-42 (SKS) - A29-2 (SKS1)
    		Always
    		Below 1 Ω
    A61-42 (SKS) - Body ground
    		Always
    		10 kΩ or higher
    A61-40 (SKS2) - A29-4 (SKS2)
    		Always
    		Below 1 Ω
    A61-40 (SKS2) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT SKID CONTROL ECU (SENSOR OUTPUT)


    C234579E01

  1. Reconnect the skid control ECU connector.

  1. Turn the power switch on (IG).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A29-3 (VCSK) - A29-1 (SKG)
    		Power switch on (IG)
    		4.84 to 5.16 V

    Text in Illustration 
    *a
    		Front view of wire harness connector
    (to Brake Pedal Stroke Sensor)

    Result:

    Result
    		Proceed to
    OK (for LHD)
    		A
    OK (for RHD)
    		B
    NG (for LHD)
    		C
    NG (for RHD)
    		D



B
REPLACE BRAKE PEDAL STROKE SENSOR (Click here)

C
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER (Click here)

D
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER (Click here)
A

REPLACE BRAKE PEDAL STROKE SENSOR (Click here)