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) 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	DTC Output from	Priority
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 · Certification ECU (smart key ECU assembly)	Brake/EPB	A

WIRING DIAGRAM

Refer to DTC P057111.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model)>P057111202303,999999,_54,_111814,_0503031,RM100000002AE77,P057111

CAUTION / NOTICE / HINT

NOTICE:

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

Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.

DTC precaution

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model)>PRECAUTION202203,999999,_54,_111814,_0503031,RM1000000022FI7,

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

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

HINT:: Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE PEDAL (for Gasoline Model)>ADJUSTMENT202111,999999,_54,_111815,_0500817,RM100000001Z3ZW,

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

Result:

Proceed to
OK
NG

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

ADJUST BRAKE PEDAL OR STOP LIGHT SWITCH ASSEMBLY

Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE PEDAL (for Gasoline Model)>ADJUSTMENT202111,999999,_54,_111815,_0500817,RM100000001Z3ZW,

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

Procedure1

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

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

Procedure2

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

OK:: No deformation or corrosion.

Procedure3

0.375,0.75 0.813,1.01 0.438,0.26 2.156,1.656 1.844,1.031 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 2.177,1.688 2.333,1.885 0.156,0.198 10 false L 0.469,0.813 0.958,1.146 0.49,0.333 10 false A43

*a	Component with harness connected (Stop Light Switch Assembly)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A43)Location & Routingewd_type=routing;type=c;code=A43 Click Connector(A43)Instrument Panel>Engine Room Main Wire>Stop Light Switch Assemblyewd_type=component;type=c;code=A43;pinno=3
A43-3 (L) - Body ground	Brake pedal released	Below 1.5 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(A43)Location & Routingewd_type=routing;type=c;code=A43

Click Connector(A43)Instrument Panel>Engine Room Main Wire>Stop Light Switch Assemblyewd_type=component;type=c;code=A43;pinno=3

A43-3 (L) - Body ground

Brake pedal released

Below 1.5 V

Result:

Proceed to
OK
NG

Post-procedure1

None

REPLACE BRAKE ACTUATOR ASSEMBLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR (for Gasoline Model)>REMOVAL202303,202406,_54,_111814,_0500728,RM100000002B2O5,202406,999999,_54,_111814,_0500728,RM100000002MRSD,

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

Procedure1

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

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

Disconnect the A43 stop light switch assembly connector.

Procedure2

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

OK:: No deformation or corrosion.

Procedure3

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A43)Location & Routingewd_type=routing;type=c;code=A43 Click Connector(A43)Instrument Panel>Engine Room Main Wire>Stop Light Switch Assemblyewd_type=component;type=c;code=A43;pinno=3
A43-3 (L) - Body ground	Always	Below 1.5 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(A43)Location & Routingewd_type=routing;type=c;code=A43

Click Connector(A43)Instrument Panel>Engine Room Main Wire>Stop Light Switch Assemblyewd_type=component;type=c;code=A43;pinno=3

A43-3 (L) - Body ground

Always

Below 1.5 V

Result:

Proceed to
OK
NG

Post-procedure1

None

REPLACE STOP LIGHT SWITCH ASSEMBLY

Click hereVehicle Exterior>LIGHTING (EXT)>STOP LIGHT SWITCH>REMOVAL202111,999999,_59,_111834,_0499900,RM100000001Z0MK,

4.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM)

Procedure1

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

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

Disconnect the A43 stop light switch assembly connector.

Disconnect the A109 ECM connector.

Procedure2

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

OK:: No deformation or corrosion.

Procedure3

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A43)Location & Routingewd_type=routing;type=c;code=A43 Click Connector(A43)Instrument Panel>Engine Room Main Wire>Stop Light Switch Assemblyewd_type=component;type=c;code=A43;pinno=3
A43-3 (L) - Body ground	Always	Below 1.5 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(A43)Location & Routingewd_type=routing;type=c;code=A43

Click Connector(A43)Instrument Panel>Engine Room Main Wire>Stop Light Switch Assemblyewd_type=component;type=c;code=A43;pinno=3

A43-3 (L) - Body ground

Always

Below 1.5 V

Result:

Proceed to
OK
NG

Post-procedure1

None

REPLACE ECM

Click hereEngine / Hybrid System>M20C-FKS, M20D-FKS (ENGINE CONTROL)>ECM>REMOVAL202303,202406,_51,_111785,_0503271,RM1000000029P3U,202406,999999,_51,_111785,_0503271,RM100000002MPY1,

5.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY)

Procedure1

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

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

Disconnect the A43 stop light switch assembly connector.

Disconnect the A109 ECM connector.

Disconnect the A15 certification ECU (smart key ECU assembly) connector.

Procedure2

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

OK:: No deformation or corrosion.

Procedure3

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A43)Location & Routingewd_type=routing;type=c;code=A43 Click Connector(A43)Instrument Panel>Engine Room Main Wire>Stop Light Switch Assemblyewd_type=component;type=c;code=A43;pinno=3
A43-3 (L) - Body ground	Always	Below 1.5 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(A43)Location & Routingewd_type=routing;type=c;code=A43

Click Connector(A43)Instrument Panel>Engine Room Main Wire>Stop Light Switch Assemblyewd_type=component;type=c;code=A43;pinno=3

A43-3 (L) - Body ground

Always

Below 1.5 V

Result:

Proceed to
OK
NG

Post-procedure1

None

REPLACE SMART KEY ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR