RM3660EC _54 Brake _080770 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS _0599814 ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model (NR Series)) C

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS  ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model (NR Series))  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
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)



DTC Detection Conditions: P057111
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition The stop light switch assembly off and vehicle speed of 3 km/h (2 mph) or more. ○ ○
Malfunction Status The stop light switch assembly is judged to be on based on the master cylinder pressure value. ○ -
The master cylinder pressure is more than 8 MPa (81.6 kgf/cm2, 1160 psi). - ○
Detection Time 3 seconds or more. 3 seconds or more.
Number of Trips 1 trip 1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.


WIRING DIAGRAM

C506442
1.646,7.083 3.406,7.344 1.76,0.26 10 false Stop Light Switch Assembly 4.74,7.24 5.198,7.438 0.458,0.198 10 false A51 4.667,4.385 4.979,4.583 0.313,0.198 10 false 41 4.917,4.594 5.375,4.792 0.458,0.198 10 false STP 4.896,5.49 5.354,5.688 0.458,0.198 10 false STPO 4.917,6.5 5.375,6.698 0.458,0.198 10 false STP2 4.677,5.281 4.99,5.479 0.313,0.198 10 false 33 4.677,6.26 4.99,6.458 0.313,0.198 10 false 43 3.344,6.271 3.656,6.469 0.313,0.198 10 false 1 3.344,5.302 3.656,5.5 0.313,0.198 10 false 4 3.344,4.375 3.656,4.573 0.313,0.198 10 false 3 2.958,6.5 3.417,6.698 0.458,0.198 10 false OUT 2.948,5.5 3.406,5.698 0.458,0.198 10 false ACC 3.146,4.604 3.604,4.802 0.458,0.198 10 false L 1.75,4.927 2.208,5.125 0.458,0.198 10 false B 1.75,6.5 2.208,6.698 0.458,0.198 10 false GND 0.969,4.969 1.427,5.167 0.458,0.198 10 false STOP 1.115,3.885 2.031,4.083 0.917,0.198 10 false from Battery 2.104,7.625 3.344,7.906 1.24,0.281 10 false to Stop Light Circuit 1.552,6.292 1.865,6.49 0.313,0.198 10 false 2 1.552,4.719 1.865,4.917 0.313,0.198 10 false 7 1.646,6.896 2.104,7.094 0.458,0.198 10 false A53 4.74,7.438 6.281,7.823 1.542,0.385 10 false Skid Control ECU (Brake Actuator Assembly) 2.51,3.125 2.844,3.458 0.333,0.333 10 false A46 2.5,3.292 2.865,3.5 0.365,0.208 10 false ECM 1.802,1.854 3.927,2.229 2.125,0.375 10 false Shift Lock Control ECU (Shift Lock Control Unit Assembly) 4.708,3.271 6.521,3.823 1.813,0.552 10 false Certification ECU (Smart Key ECU Assembly) 1.813,1.698 2.271,1.896 0.458,0.198 10 false I18 2.938,2.719 3.396,2.917 0.458,0.198 10 false STP 2.938,1.313 3.396,1.51 0.458,0.198 10 false STP 4.917,2.729 5.375,2.927 0.458,0.198 10 false STP1 3.323,1.24 3.667,1.5 0.344,0.26 10 false 4 3.313,2.625 3.688,2.865 0.375,0.24 10 false 9 4.656,2.615 5.031,2.854 0.375,0.24 10 false 24 4.708,3.125 5.208,3.458 0.5,0.333 10 false O61

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model (NR Series))>UTILITY



PROCEDURE

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

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Enter the following menus: Chassis / Brake/EPB / Data List.

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

d.

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

OK:

The value of Data List item Master Cylinder Sensor 1 when the brake pedal is released is less than 0.15 MPa.



Result:
Proceed to
OK
NG



OK

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

NG

4.CHECK DTC
2.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY SIGNAL INPUT CIRCUIT)
a.
C402833C01
0.25,0.313 0.698,0.542 0.448,0.229 2.083,0.938 2.552,0.396 true 2.469,0.208 2.927,0.406 0.458,0.198 10 false STP 0.094,0.083 0.406,0.281 0.313,0.198 10 false *a 0.365,0.344 0.823,0.542 0.458,0.198 10 false A51
*a Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly))


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

OK:

The connector is securely connected.



b.

Disconnect the A51 skid control ECU (brake actuator assembly) connector.


c.

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

OK:

No deformation or corrosion.



d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A51-41 (STP) - Body ground Brake pedal depressed 11 to 14 V



Result:
Proceed to
OK
NG



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)
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.



b.

Disconnect the A51 skid control ECU (brake actuator assembly) connector.


c.

Disconnect the A53 stop light switch assembly connector.


d.

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

OK:

No deformation or corrosion.



e.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A53-3 (L) - A51-41 (STP) Always Below 1 Ω
A53-3 (L) or A51-41 (STP) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



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.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Read the DTCs following the prompts on the GTS. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.

Chassis > Brake/EPB > Trouble Codes
50001 435

d.

Check the details of the DTCs.


Result:
Result Proceed to
P057111 and C05401C, C054028 and/or C054049 are output simultaneously A
P057111 is output B



A

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model (NR Series))>DIAGNOSTIC TROUBLE CODE CHART


B

GO TO BRAKE SYSTEM

Inspect brake booster assembly:

Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE BOOSTER (for Gasoline Model)>ON-VEHICLE INSPECTION

Inspect brake pedal free play:

Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE PEDAL (for Gasoline Model)>ADJUSTMENT