Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Stop Lamp Relay Actuator Stuck On (C13807E)

DESCRIPTION

When any of the following conditions are met, the skid control ECU (brake actuator assembly) sets the drive output (STPO) ON which operates the stop light control relay (stop light switch assembly) and turns on the stop lights.

Illumination Conditions:
  • Pre-collision brake is operating.
  • The dynamic radar cruise control system is operating and is applying the brakes.
  • Secondary collision brake is operating.
  • Brake hold is operating.
  • The parking brake is engaged while the vehicle is being driven.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C13807E

Stop Lamp Relay Actuator Stuck On

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 off, the signal at the STP2 terminal is different from the input signal at the STP 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

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 C13807E, 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 ILLUMINATION STATUS

(a) With the brake pedal released, check the illumination status of the brake lights.

Result

Proceed to

The stop lights are illuminated.

A

The stop lights are not illuminated.

B

B

GO TO STEP 7

A

2.

CHECK HARNESS AND CONNECTOR (STOP LIGHT CONTROL RELAY CIRCUIT)

(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

NG

GO TO STEP 5

OK

3.

CHECK STOP LIGHT ILLUMINATION STATUS

(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 A53 stop light switch assembly connector.

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

OK:

No deformation or corrosion.

(d) Check the illumination status of the brake lights.

Result

Proceed to

The stop lights are illuminated.

A

The stop lights are not illuminated.

B

B

REPLACE STOP LIGHT SWITCH ASSEMBLY

A

4.

CHECK STOP LIGHT ILLUMINATION STATUS

(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 A151 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) Check the illumination status of the brake lights.

Result

Proceed to

The stop lights are illuminated.

A

The stop lights are not illuminated.

B

A

REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT CIRCUIT)

B

REPLACE BRAKE ACTUATOR ASSEMBLY

5.

CHECK HARNESS AND CONNECTOR (STOP LIGHT CONTROL RELAY 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

Component with harness connected

(Stop Light Switch Assembly)

(b) Disconnect the A151 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

A53-4 (ACC) - Body ground

Always

11 to 14 V

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

6.

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.

(b) Disconnect the A53 stop right switch assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A53-4 (ACC) or A151-27 (STPO) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE STOP LIGHT SWITCH ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

CHECK STOP LIGHT OPERATION

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

OK:

The stop lights illuminate.

NG

GO TO STEP 9

OK

8.

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.

(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

A151-43 (STP2) - Body ground

Brake pedal depressed

11 to 14 V

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.

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.

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

OK:

No deformation or corrosion.

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

OK:

The stop lights illuminate.

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

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.

*a

Front view of wire harness connector

(to Rear Combination Light Assembly LH)

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

(c) Disconnect the S14 rear combination light assembly LH 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

OK

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

NG

11.

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.

(c) Disconnect the S14 rear combination light assembly LH 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

OK

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

NG

12.

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.

(c) Disconnect the S14 rear combination light assembly LH 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

OK

REPLACE CENTER STOP LIGHT ASSEMBLY

NG

13.

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.

(c) Disconnect the S14 rear combination light assembly LH 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

OK

REPLACE STOP LIGHT SWITCH ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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