RM36D0EC _54 Brake _083077 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS _0402316 ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model) C

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS  ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for Gasoline Model)  P057112  Brake Switch "A" Circuit Short to Battery  


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.

DTCs may be stored if either of the following occurs:

·

Stop light switch assembly stuck on malfunction.

·

The accelerator and brake pedals are depressed simultaneously.*


HINT:

*: The skid control ECU (brake actuator assembly) may store this DTC upon judging that a stuck on malfunction has occurred when the accelerator pedal and brake pedal are depressed simultaneously. However, this does not indicate a malfunction.


DTC No. Detection Item DTC Detection Condition Trouble Area
P057112 Brake Switch "A" Circuit Short to Battery The vehicle speed is 10 km/h (6 mph) or more, the accelerator pedal is depressed, the master cylinder pressure is 0.5 MPa (5.1 kgf/cm2, 72.5 psi) or less, and the stop light switch assembly is on for 60 seconds or more.
·

Stop light switch assembly

·

Stop light switch assembly installation

·

Wire harness or connector

·

Skid control ECU (brake actuator assembly)

·

ECM

·

Shift lock control ECU (shift lock control unit assembly)

·

Certification ECU (smart key ECU assembly)



WIRING DIAGRAM

C502713E06
1.646,6.688 3.604,6.99 1.958,0.302 10 false Stop Light Switch Assembly 4.729,6.896 5.188,7.094 0.458,0.198 10 false A39 4.656,4.01 4.969,4.208 0.313,0.198 10 false 41 4.927,4.01 5.385,4.208 0.458,0.198 10 false STP 4.927,4.917 5.385,5.115 0.458,0.198 10 false STPO 4.906,5.906 5.365,6.104 0.458,0.198 10 false STP2 4.656,4.917 4.969,5.115 0.313,0.198 10 false 33 4.656,5.906 4.969,6.104 0.313,0.198 10 false 43 3.344,5.906 3.656,6.104 0.313,0.198 10 false 1 3.344,4.927 3.656,5.125 0.313,0.198 10 false 4 3.344,4 3.656,4.198 0.313,0.198 10 false 3 2.938,5.917 3.396,6.115 0.458,0.198 10 false OUT 2.938,4.927 3.396,5.125 0.458,0.198 10 false ACC 3.083,4 3.542,4.198 0.458,0.198 10 false L 1.771,4.333 2.229,4.531 0.458,0.198 10 false B 1.76,5.917 2.219,6.115 0.458,0.198 10 false GND 1,4.583 1.458,4.781 0.458,0.198 10 false STOP 1.104,3.563 2.021,3.76 0.917,0.198 10 false from Battery 2.104,7.302 3.344,7.583 1.24,0.281 10 false to Stop Light Circuit 1.552,5.917 1.865,6.115 0.313,0.198 10 false 2 1.552,4.333 1.865,4.531 0.313,0.198 10 false 7 1.646,6.531 2.104,6.729 0.458,0.198 10 false A40 4.729,7.063 6.271,7.448 1.542,0.385 10 false Skid Control ECU (Brake Actuator Assembly) 2.385,2.844 3.573,3.094 1.188,0.25 10 false A116*3, A125*4 2.656,3.021 3.115,3.229 0.458,0.208 10 false ECM 1.5,1.521 3.646,1.99 2.146,0.469 10 false Shift Lock Control ECU (Shift Lock Control Unit Assembly) 4.417,1.531 6.229,1.969 1.813,0.438 10 false Certification ECU (Smart Key ECU Assembly) 1.5,1.344 3.458,1.552 1.958,0.208 10 false G26*1, G27*2 4.427,1.354 4.885,1.552 0.458,0.198 10 false A126 2.99,2.427 3.448,2.625 0.458,0.198 10 false STP 2.99,0.99 3.448,1.188 0.458,0.198 10 false STP 4.938,1.01 5.396,1.208 0.458,0.198 10 false STP1 4.677,0.885 4.99,1.083 0.313,0.198 10 false 21 3.375,0.885 4.323,1.083 0.948,0.198 10 false 4*1, 8*2 3.385,2.302 3.698,2.5 0.313,0.198 10 false 34 0.25,8.177 5.427,8.396 5.177,0.219 10 false *2: w/o Smart Entry and Start System 0.25,7.792 2.646,8 2.396,0.208 10 false *1: w/ Smart Entry and Start System 2.885,7.792 5.281,8 2.396,0.208 10 false *3: SFTM Made 2.885,8.177 5.281,8.385 2.396,0.208 10 false *4: GTMC Made

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)>UTILITY

·

DTC precaution

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

Procedure to Clear Warning Lights (When not Clearing DTCs)
Procedure
1.

Repair or replacement.

2.

Turn the ignition switch to ON.

3.

Drive the vehicle and depress the brake pedal 2 or 3 times to clear the warning lights.





PROCEDURE

1.CHECK BRAKE PEDAL OR STOP LIGHT SWITCH ASSEMBLY INSTALLATION
a.

Check the brake pedal height and stop light switch assembly installation.

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

OK:

The brake pedal height and stop light switch assembly installation are normal.



Result:
Proceed to
OK
NG



OK

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

NG

ADJUST BRAKE PEDAL OR STOP LIGHT SWITCH ASSEMBLY

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


2.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY OUTPUT CIRCUIT)
a.
C401043C23
0.396,0.667 0.833,0.927 0.438,0.26 2.167,1.677 1.854,1.052 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 2.177,1.708 2.333,1.906 0.156,0.198 10 false L 0.49,0.729 0.979,1.063 0.49,0.333 10 false A40
*a Component with harness connected
(Stop Light Switch 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 A39 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
A40-3 (L) - Body ground Brake pedal released Below 1.5 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.
A418954C29
1.5,0.25 1.917,0.5 0.417,0.25 1.281,1.854 1.531,1.354 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 1.583,0.292 2.042,0.49 0.458,0.198 10 false A40 1.198,1.854 1.375,2.073 0.177,0.219 10 false L
*a Front view of wire harness connector
(to Stop Light Switch 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 A39 skid control ECU (brake actuator assembly) connector.


c.

Disconnect the A40 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 voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
A40-3 (L) - Body ground Always Below 1.5 V



Result:
Proceed to
OK
NG



OK

REPLACE STOP LIGHT SWITCH ASSEMBLY

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


NG

4.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM)
4.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM)
a.
A418954C29
1.5,0.25 1.917,0.5 0.417,0.25 1.281,1.854 1.531,1.354 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 1.583,0.292 2.042,0.49 0.458,0.198 10 false A40 1.198,1.854 1.375,2.073 0.177,0.219 10 false L
*a Front view of wire harness connector
(to Stop Light Switch 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 A39 skid control ECU (brake actuator assembly) connector.


c.

Disconnect the A40 stop light switch assembly connector.


d.

Disconnect the A116*1 or A125*2 ECM connector.

*1: for SFTM Made

*2: for GTMC Made



e.

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

OK:

No deformation or corrosion.



f.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A40-3 (L) - Body ground Always Below 1.5 V



Result:
Proceed to
OK
NG



OK

REPLACE ECM

M20C-FKS: Click hereEngine / Hybrid System>M20C-FKS (ENGINE CONTROL)>ECM>REMOVAL

M20D-FKS: Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>ECM>REMOVAL


NG

5.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SHIFT LOCK CONTROL UNIT ASSEMBLY)
5.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SHIFT LOCK CONTROL UNIT ASSEMBLY)
a.
A418954C29
1.5,0.25 1.917,0.5 0.417,0.25 1.281,1.854 1.531,1.354 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 1.583,0.292 2.042,0.49 0.458,0.198 10 false A40 1.198,1.854 1.375,2.073 0.177,0.219 10 false L
*a Front view of wire harness connector
(to Stop Light Switch 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 A39 skid control ECU (brake actuator assembly) connector.


c.

Disconnect the A40 stop light switch assembly connector.


d.

Disconnect the A116*1 or A125*2 ECM connector.

*1: for SFTM Made

*2: for GTMC Made



e.

w/ Smart Entry and Start System:

Disconnect the G26 shift lock control ECU (shift lock control unit assembly) connector.


f.

w/o Smart Entry and Start System:

Disconnect the G27 shift lock control ECU (shift lock control unit assembly) connector.


g.

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

OK:

No deformation or corrosion.



h.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A40-3 (L) - Body ground Always Below 1.5 V



Result:
Proceed to
OK
NG



OK

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY

for K121: Click hereDrivetrain>K121 (CVT)>SHIFT LEVER>REMOVAL

for K121F: Click hereDrivetrain>K121F (CVT)>SHIFT LEVER>REMOVAL


NG

6.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY)
6.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY)
a.
A418954C29
1.5,0.25 1.917,0.5 0.417,0.25 1.281,1.854 1.531,1.354 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 1.583,0.292 2.042,0.49 0.458,0.198 10 false A40 1.198,1.854 1.375,2.073 0.177,0.219 10 false L
*a Front view of wire harness connector
(to Stop Light Switch 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 A39 skid control ECU (brake actuator assembly) connector.


c.

Disconnect the A40 stop light switch assembly connector.


d.

Disconnect the A116*1 or A125*2 ECM connector.

*1: for SFTM Made

*2: for GTMC Made



e.

w/ Smart Entry and Start System:

Disconnect the G26 shift lock control ECU (shift lock control unit assembly) connector.


f.

w/o Smart Entry and Start System:

Disconnect the G27 shift lock control ECU (shift lock control unit assembly) connector.


g.

Disconnect the M7*1 or A126*2 certification ECU (smart key ECU assembly) connector.

*1: for SFTM Made

*2: for GTMC Made



h.

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

OK:

No deformation or corrosion.



i.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A40-3 (L) - Body ground Always Below 1.5 V



Result:
Proceed to
OK
NG



OK

REPLACE SMART KEY ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR