Toyota Corolla Cross: Stop Lamp Relay Actuator Stuck Off (C13807F)

Toyota Corolla Cross (2022-2024) Service Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System (for Gasoline Model) / Stop Lamp Relay Actuator Stuck Off (C13807F)

DESCRIPTION

Refer to DTC C13807E.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C13807F	Stop Lamp Relay Actuator Stuck Off	When the voltage at the +BS terminal is between 10 V or more and the stop light control relay (stop light switch assembly) drive output (STPO) is on, a signal is not input to the STP2 terminal for 5 seconds or more.	Wire harness or connector Stop light switch assembly Skid control ECU (brake actuator assembly) Rear combination light assembly LH Rear combination light assembly RH Center stop light assembly

WIRING DIAGRAM

Refer to DTC C13807E.

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CAUTION / NOTICE / HINT

NOTICE:

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

HINT:

When DTC C117B62, P057112 and/or P057113 are output together with DTC C13807F, inspect and repair the trouble areas indicated by DTC C117B62, P057112 and/or P057113 first.

C117B62: Click here

P057112: Click here

P057113: Click here

PROCEDURE

1.	CHECK STOP LIGHT OPERATION

(a) Check that the stop lights come on when the brake pedal is depressed.

OK:

The stop lights illuminate.

GO TO STEP 6

2.	PERFORM ACTIVE TEST USING GTS (STOP LAMP RELAY)

(a) Operate the GTS to perform the Active Test.

Chassis > Brake/EPB > Active Test

Tester Display	Measurement Item	Control Range	Restrict Condition	Diagnostic Note
Stop Lamp Relay	Stop light control relay (Stop light switch assembly)	Relay OFF / ON	Vehicle condition: Vehicle stopped HINT: To protect this Actuator and Solenoid, this test will only last 5 seconds.	With the brake pedal released, check that the stop lights illuminate and the value of Stop Light Relay on the GTS changes to ON when Stop Lamp Relay is ON

Tester Display

Measurement Item

Control Range

Restrict Condition

Diagnostic Note

Stop Lamp Relay

Stop light control relay (Stop light switch assembly)

Relay OFF / ON

Vehicle condition: Vehicle stopped

HINT:

To protect this Actuator and Solenoid, this test will only last 5 seconds.

With the brake pedal released, check that the stop lights illuminate and the value of Stop Light Relay on the GTS changes to ON when Stop Lamp Relay is ON

Chassis > Brake/EPB > Active Test

Tester Display
Stop Lamp Relay

(b) According to the display on the GTS, perform the Active Test and check the operation of the stop lights.

OK:

Stop lights turn on in accordance with the Active Test.

GO TO STEP 4

3.	CHECK HARNESS AND CONNECTOR (STOP LIGHT SIGNAL INPUT CIRCUIT)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.

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
A151-43 (STP2) - Body ground	Brake pedal depressed	11 to 14 V

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	INSPECT STOP LIGHT SWITCH ASSEMBLY (ACC TERMINAL VOLTAGE)

(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.

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
A53-4 (ACC) - Body ground	Always	11 to 14 V

REPLACE STOP LIGHT SWITCH ASSEMBLY

5.	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 connectors.

OK:

The connector is securely connected.

*a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.

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
A151-27 (STPO) - Body ground	Always	11 to 14 V

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK STOP LIGHT OPERATION

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.

OK:

No deformation or corrosion.

(d) Check that the stop lights come on when the brake pedal is depressed.

OK:

The stop lights illuminate.

REPLACE BRAKE ACTUATOR ASSEMBLY

7.	CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - REAR COMBINATION LIGHT ASSEMBLY LH)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a	Front view of wire harness connector (to Rear Combination Light Assembly LH)

(b) Disconnect the A151 skid control ECU (brake actuator 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
S14-1 (B) - Body ground	Brake pedal depressed	11 to 14 V

GO TO LIGHTING SYSTEM (REAR COMBINATION LIGHT ASSEMBLY LH (STOP LIGHT CIRCUIT))

Refer to "Left or right stop light does not illuminate" of problem symptoms table.

w/ AFS: Click here

w/o AFS: Click here

8.	CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - REAR COMBINATION LIGHT ASSEMBLY RH)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a	Front view of wire harness connector (to Rear Combination Light Assembly RH)

(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.

(d) Disconnect the S15 rear combination light assembly RH connector.

(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
S15-1 (B) - Body ground	Brake pedal depressed	11 to 14 V

GO TO LIGHTING SYSTEM (REAR COMBINATION LIGHT ASSEMBLY RH (STOP LIGHT CIRCUIT))

Refer to "Left or right stop light does not illuminate" of problem symptoms table.

w/ AFS: Click here

w/o AFS: Click here

9.	CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - CENTER STOP LIGHT ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

*a	Front view of wire harness connector (to Center Stop Light Assembly)

(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.

(d) Disconnect the S15 rear combination light assembly RH connector.

(e) Disconnect the U1 center stop light assembly connector.

(f) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
U1-1 (B) - Body ground	Brake pedal depressed	11 to 14 V

REPLACE CENTER STOP LIGHT ASSEMBLY

10.	CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - REAR COMBINATION LIGHT ASSEMBLY LH)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.

(d) Disconnect the S15 rear combination light assembly RH connector.

(e) Disconnect the U1 center stop light assembly connector.

(f) Disconnect the A53 stop light switch assembly connector.

(g) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A53-1 (OUT) - S14-1 (B)	Always	Below 1 Ω
A53-1 (OUT) or S14-1 (B) - Body ground	Always	10 kΩ or higher

REPLACE STOP LIGHT SWITCH ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

SEE MORE:

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