Lexus ES: 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 STP terminal for 5 seconds or more. |
|
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.
-
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
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HINT:
When DTC P057111, P057112 and/or P057113 are output together with DTC C13807F, inspect and repair the trouble areas indicated by DTC P057111, P057112 and/or P057113 first.
P057111: 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.
| NG |  | GO TO STEP 6 |
|
| 2. | PERFORM ACTIVE TEST USING TECHSTREAM (STOP LAMP RELAY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Enter the following menus: Chassis / Brake/EPB / 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. | - |
| Tester Display |
|---|
| Stop Lamp Relay |
(d) According to the display on the Techstream, perform the Active Test and check the operation of the stop lights.
OK:
Stop lights turn on in accordance with the Active Test.
| NG | | 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. |
|
(b) Disconnect the A40 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 |
|---|---|---|
| A40-43 (STP2) - Body ground | Brake pedal depressed | 11 to 14 V |
| OK | | REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | | 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. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A43-4 (ACC) - Body ground | Always | 11 to 14 V |
| NG | | 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. |
|
(b) Disconnect the A40 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 |
|---|---|---|
| A40-33 (STPO) - Body ground | Brake pedal depressed | 11 to 14 V |
| OK | | REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | | 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 A40 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 |
|
| 7. | CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - REAR COMBINATION LIGHT LENS AND BODY 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 A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the R9 rear combination light lens and body 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 |
|---|---|---|
| R9-1 (STP) - Body ground | Brake pedal depressed | 11 to 14 V |
| OK | | REPLACE REAR COMBINATION LIGHT LENS AND BODY LH |
|
| 8. | CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - REAR COMBINATION LIGHT LENS AND BODY 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. |
|
(b) Disconnect the A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the R9 rear combination light lens and body LH connector.
(d) Disconnect the R8 rear combination light lens and body 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 |
|---|---|---|
| R8-1 (STP) - Body ground | Brake pedal depressed | 11 to 14 V |
| OK | | REPLACE REAR COMBINATION LIGHT LENS AND BODY RH |
|
| 9. | CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - REAR 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 A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the R9 rear combination light lens and body LH connector.
(d) Disconnect the R8 rear combination light lens and body RH connector.
(e) Disconnect the R11 rear light assembly LH 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 |
|---|---|---|
| R11-5 (B) - Body ground | Brake pedal depressed | 11 to 14 V |
| OK | | REPLACE REAR LIGHT ASSEMBLY LH |
|
| 10. | CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - REAR 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. |
|
(b) Disconnect the A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the R9 rear combination light lens and body LH connector.
(d) Disconnect the R8 rear combination light lens and body RH connector.
(e) Disconnect the R11 rear light assembly LH connector.
(f) Disconnect the R10 rear light assembly RH 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 |
|---|---|---|
| R10-5 (B) - Body ground | Brake pedal depressed | 11 to 14 V |
| OK | | REPLACE REAR LIGHT ASSEMBLY RH |
|
| 11. | CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - CENTER STOP LIGHT SET) |
| (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 A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the R9 rear combination light lens and body LH connector.
(d) Disconnect the R8 rear combination light lens and body RH connector.
(e) Disconnect the R11 rear light assembly LH connector.
(f) Disconnect the R10 rear light assembly RH connector.
(g) Disconnect the N52 center stop light set connector.
(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 |
|---|---|---|
| N52-1 (B) - Body ground | Brake pedal depressed | 11 to 14 V |
| OK | | REPLACE CENTER STOP LIGHT SET |
|
| 12. | CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - REAR COMBINATION LIGHT LENS AND BODY 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 A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A43 stop light switch assembly connector.
(d) Disconnect the R9 rear combination light lens and body LH connector.
(e) Disconnect the R8 rear combination light lens and body RH connector.
(f) Disconnect the R11 rear light assembly LH connector.
(g) Disconnect the R10 rear light assembly RH connector.
(h) Disconnect the N52 center stop light set connector.
(i) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(j) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A43-1 (OUT) - R9-1 (STP) | Always | Below 1 Ω |
| A43-1 (OUT) or R9-1 (STP) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE STOP LIGHT SWITCH ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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SEE MORE:
Abbreviations Used In Manual
ABBREVIATIONS USED IN MANUAL
Abbreviation
Meaning
ABS
Anti-Lock Brake System
A/C
Air Conditioner
AC
Alternating Current
ACC
Accessory
ACIS
Installation
INSTALLATION CAUTION / NOTICE / HINT for HV Model:
When removing or installing the rear disc brake caliper assembly, pushing back the disc brake piston may cause a large clearance between the brake pads and brake disc. When the brake pedal is depressed with a large clearance between the brake pad
