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 [10/2014 - ]: Procedure

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 (Refer to PROCEDURE - Step 1 ).
3. Adjust the brake pedal stroke sensor assembly (Refer to PROCEDURE - Step 4 ).

NEXT 

See step  2

1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
2. Disconnect the A51 skid control ECU (brake booster with master cylinder assembly) connector.
3. Disconnect the A55 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
   A51-39 (VCSK) - A55-3 (VCSK)	Always	Below 1 Ω
   A51-39 (VCSK) - Body ground	Always	10 kΩ or higher
   A55-3 (VCSK) - Body ground	Always	10 kΩ or higher
   A51-41 (SKG) - A55-1 (SKG)	Always	Below 1 Ω
   A51-41 (SKG) - Body ground	Always	10 kΩ or higher
   A55-1 (SKG) - Body ground	Always	10 kΩ or higher
   A51-42 (SKS) - A55-4 (SKS1)	Always	Below 1 Ω
   A51-42 (SKS) - Body ground	Always	10 kΩ or higher
   A55-4 (SKS1) - Body ground	Always	10 kΩ or higher
   A51-40 (SKS2) - A55-2 (SKS2)	Always	Below 1 Ω
   A51-40 (SKS2) - Body ground	Always	10 kΩ or higher
   A55-2 (SKS2) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Reconnect the A51 skid control ECU (brake booster with master cylinder assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the power switch on (IG).
3. Measure the voltage according to the value (s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A55-3 (VCSK) - A55-1 (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 Assembly)

Result: 

OK 

REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

NG 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )