DTC C14C3: Servo Pressure Sensor Zero Point Malfunction [04/2018 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.

READ VALUE USING TECHSTREAM (SERVO PRESSURE)

Select the Data List on the Techstream.

Refer to DATA LIST / ACTIVE TEST [04/2018 - ]

Chassis > ABS/VSC/TRAC > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Servo Pressure	Pressure value of servo	Min.: 0.00 MPa, Max.: 24.48 MPa	Brake pedal released: 0.00 to 2.10 MPa	Brake pedal is being depressed: Changes in proportion to the depression force of the brake pedal

Chassis > ABS/VSC/TRAC > Data List

Tester Display
Servo Pressure

Check that the servo pressure sensor output value is within 0.00 to 1.53 MPa when the brake pedal not depressed.

The servo pressure sensor output value is within 0.00 to 1.53 MPa.

HINT:

If the servo pressure sensor output value is within 0.00 to 1.53 MPa, the skid control ECU (brake booster with master cylinder assembly) automatically performs zero point calibration every time the power switch is turned on (IG).

Therefore, if the servo pressure sensor output value is not within 0.00 to 1.53 MPa, replace the skid control ECU (brake booster with master cylinder assembly) with a new one.

Result

Proceed to
OK
NG

Result:

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to REMOVAL [04/2018 - 08/2021] , or refer to REMOVAL [08/2021 - ]

Result:

See step 2

RECONFIRM DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [04/2018 - ]

Chassis > ABS/VSC/TRAC > Clear DTCs
Turn the power switch off.
Turn the power switch on (IG).

Check if the same DTC is output.

Refer to DTC CHECK / CLEAR [04/2018 - ]

Chassis > ABS/VSC/TRAC > Trouble Codes

HINT:

Even if the DTC is cleared, it will immediately be output again if the servo pressure sensor zero point malfunction remains.

Result

Result	Proceed to
DTC C14C3 is not output.	A
DTC C14C3 is output.	B

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - ]

Result:

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to REMOVAL [04/2018 - 08/2021] , or refer to REMOVAL [08/2021 - ]