C1247

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1247/47: Stroke Sensor Malfunction

DTC C1247/47 - Stroke Sensor Malfunction

DTC C1392/48 - Stroke Sensor Zero Point Calibration Undone

DESCRIPTION

The stroke sensor inputs the pedal stroke into the skid control ECU.






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration Initialization.
HINT: Check the condition of each related circuit connector before troubleshooting Electronic Circuit Inspection Procedure.

PROCEDURE

1. CHECK BRAKE PEDAL
(a) Check that the brake pedal and the brake pedal stroke sensor are properly installed and that the pedal can be operated normally.
(b) Check and adjust the brake pedal height Adjustments.
(c) Adjust the brake pedal stroke sensor Installation.
NEXT -- Continue to next step.

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




(a) Confirm that the skid control ECU connector and brake pedal stroke sensor connector connected.
(b) Disconnect the S9 ECU connector.
(c) Disconnect the B8 sensor connector.
(d) Inspect both the connector case and the terminal for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. PERFORM INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION
NEXT -- Continue to next step.

4. RECONFIRM DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Turn the power switch ON (READY).
(c) Check the same DTCs are recorded Reading and Clearing Diagnostic Trouble Codes.

Result





HINT: This DTC may be memorized due to a malfunction in the connector terminal connection, etc.

B -- END
A -- Continue to next step.

5. CHECK SKID CONTROL ECU (VCSK, SKG VOLTAGE)




(a) Measure the voltage of the connector.
HINT: Measure the voltage from behind the connector with the connector connected to the skid control ECU.

Standard voltage:






NG -- REPLACE SKID CONTROL ECU
OK -- Continue to next step.

6. READ VALUE USING TECHSTREAM (BRAKE PEDAL STROKE SENSOR)
(a) Connect the pedal effort gauge.
(b) Connect Techstream to the DLC3.
(c) Turn the power switch ON (IG).
(d) Select the Data List mode on Techstream.

ABS / VSC / TRAC:





(e) When depressing the brake pedal with the amount of force listed in the table below, check that the output value displayed on Techstream is normal.
HINT: The brake pedal must be depressed gradually.

Standard voltage:






NG -- REPLACE BRAKE PEDAL STROKE SENSOR
OK -- REPLACE SKID CONTROL ECU