RM38N0EC _54 Brake _111814 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS _0503031 ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model) C

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS  ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model)  P057111  Brake Switch "A" Circuit Short to Ground  


DESCRIPTION

The skid control ECU (brake actuator assembly) receives stop light switch assembly signals and uses them to determine whether or not the brakes are applied.

When the brake pedal is depressed and no signal is received from the stop light switch assembly, this DTC is output.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
P057111 Brake Switch "A" Circuit Short to Ground Either of the following is detected when the vehicle speed of 3 km/h (2 mph) or more:
1.

With the stop light switch assembly off, the stop light switch assembly is judged to be on based on the master cylinder pressure value for 3 seconds or more.

2.

With the stop light switch assembly off, the master cylinder pressure is more than 8 MPa (81.6 kgf/cm2, 1160 psi) for 3 seconds or more.


·

Stop light switch assembly

·

Wire harness or connector

·

Skid control ECU (brake actuator assembly)


Brake/EPB A

WIRING DIAGRAM

C505180E01
1.74,5.052 3.5,5.313 1.76,0.26 10 false Stop Light Switch Assembly 4.844,5.229 5.302,5.427 0.458,0.198 10 false A40 4.719,2.375 5.031,2.573 0.313,0.198 10 false 41 4.969,2.615 5.427,2.813 0.458,0.198 10 false STP 4.958,3.51 5.417,3.708 0.458,0.198 10 false STPO 4.969,4.5 5.427,4.698 0.458,0.198 10 false STP2 4.708,3.281 5.021,3.479 0.313,0.198 10 false 33 4.719,4.292 5.031,4.49 0.313,0.198 10 false 43 3.406,4.292 3.719,4.49 0.313,0.198 10 false 1 3.406,3.281 3.719,3.479 0.313,0.198 10 false 4 3.406,2.385 3.719,2.583 0.313,0.198 10 false 3 3.021,4.49 3.479,4.688 0.458,0.198 10 false OUT 3,3.49 3.458,3.688 0.458,0.198 10 false ACC 3.198,2.594 3.656,2.792 0.458,0.198 10 false L 1.823,2.927 2.281,3.125 0.458,0.198 10 false B 1.813,4.5 2.271,4.698 0.458,0.198 10 false GND 1.01,2.979 1.469,3.177 0.458,0.198 10 false STOP 1.198,1.906 2.115,2.104 0.917,0.198 10 false from Battery 2.135,5.656 3.375,5.938 1.24,0.281 10 false to Stop Light Circuit 1.604,4.281 1.917,4.479 0.313,0.198 10 false 2 1.615,2.719 1.927,2.917 0.313,0.198 10 false 7 1.75,4.885 2.208,5.083 0.458,0.198 10 false A43 4.823,5.417 6.365,5.802 1.542,0.385 10 false Skid Control ECU (Brake Actuator Assembly) 2.427,1.115 2.875,1.396 0.448,0.281 10 false A109 2.417,1.271 2.781,1.479 0.365,0.208 10 false ECM 4.906,1.281 6.719,1.833 1.813,0.552 10 false Certification ECU (Smart Key ECU Assembly) 3.01,0.729 3.469,0.927 0.458,0.198 10 false STP 5.01,0.74 5.469,0.938 0.458,0.198 10 false STP1 3.375,0.635 3.719,0.896 0.344,0.26 10 false 34 4.719,0.635 5.094,0.875 0.375,0.24 10 false 21 4.917,1.115 5.417,1.448 0.5,0.333 10 false A15

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.


PROCEDURE

1.READ VALUE USING GTS (MASTER CYLINDER SENSOR 1)
a.

Check the value of Data List item Master Cylinder Sensor 1 when the brake pedal is released.

Chassis > Brake/EPB > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Master Cylinder Sensor 1 Master cylinder pressure sensor pressure (value detected by ECU) Min.: -1.00 MPa, Max.: 23.99 MPa Brake pedal released: -1.00 to 0.00 MPa Reading increases when brake pedal is depressed
Chassis > Brake/EPB > Data List
Tester Display
Master Cylinder Sensor 1
50003 435 21

Result:
Result Proceed to
The value of Master Cylinder Sensor 1 is less than 0.15 MPa A
None of the above conditions are met B



A

2.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY SIGNAL INPUT CIRCUIT)

B

4.CHECK DTC
2.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY SIGNAL INPUT CIRCUIT)

Procedure1

a.

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

OK:

The connector is securely connected.



Pre-procedure1

b.

Disconnect the A40 skid control ECU (brake actuator assembly) connector.


Procedure2

c.

Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.



Procedure3

d.

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

Standard Voltage:
Tester Connection Condition Specified Condition

Click Location & Routing(A40)Location & Routing

Click Connector(A40)Engine Compartment>Engine Room Main Wire / Transmission Wire>Brake Actuator Assembly

A40-41 (STP) - Body ground Brake pedal depressed 11 to 14 V


Result:
Proceed to
OK
NG



Post-procedure1

e.

None



OK

REPLACE BRAKE ACTUATOR ASSEMBLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR (for Gasoline Model)>REMOVAL


NG

3.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)
3.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

Procedure1

a.

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

OK:

The connector is securely connected.



Pre-procedure1

b.

Disconnect the A40 skid control ECU (brake actuator assembly) connector.


c.

Disconnect the A43 stop light switch assembly connector.


Procedure2

d.

Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.



Procedure3

e.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(A43,A40)Location & Routing

Click Connector(A43)Instrument Panel>Engine Room Main Wire>Stop Light Switch Assembly

Click Connector(A40)Engine Compartment>Engine Room Main Wire / Transmission Wire>Brake Actuator Assembly

A43-3 (L) - A40-41 (STP) Always Below 1 Ω
A43-3 (L) or A40-41 (STP) - Body ground and other terminals Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

f.

None



OK

REPLACE STOP LIGHT SWITCH ASSEMBLY

Click hereVehicle Exterior>LIGHTING (EXT)>STOP LIGHT SWITCH>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK DTC
a.

Check the details of the DTCs.

Chassis > Brake/EPB > Trouble Codes
50001 435

Result:
Result Proceed to
C05401C, C054028, C054049 or P057111 is output A
P057111 is output B



A

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

B

GO TO BRAKE SYSTEM

Inspect brake booster assembly: Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model)>ON-VEHICLE INSPECTION

Inspect brake pedal free play: Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE PEDAL (for Gasoline Model)>ADJUSTMENT