Refer to DTC C13807E.
| 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) ·
Stop light LED ·
Rear combination light socket and wire LH ·
Rear combination light socket and wire RH ·
Center stop light assembly ·
Center stop light cord assembly |
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.
When DTC P057112 and/or P057113 are output together with DTC C13807F, inspect and repair the trouble areas indicated by DTC P057112 and/or P057113 first.
Check that the stop lights come on when the brake pedal is depressed.
The stop lights illuminate.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Enter the following menus: 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) | OFF / ON | Vehicle condition: Vehicle stopped
|
- |
| Tester Display |
|---|
| Stop Lamp Relay |
According to the display on the GTS, perform the Active Test and check the operation of the stop lights.
Stop lights turn on in accordance with the Active Test.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
| *a | Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly)) |
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
The connector is securely connected.
Disconnect the A39 skid control ECU (brake actuator assembly) connector.
Check both the connector case and the terminals for deformation and corrosion.
No deformation or corrosion.
Measure the voltage according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A39-43 (STP2) - Body ground | Brake pedal depressed | 11 to 14 V |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
| *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.
The connector is securely connected.
Measure the voltage according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A40-4 (ACC) - Body ground | Always | 11 to 14 V |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
| *a | Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly)) |
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
The connector is securely connected.
Disconnect the A39 skid control ECU (brake actuator assembly) connector.
Check both the connector case and the terminals for deformation and corrosion.
No deformation or corrosion.
Measure the voltage according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A39-33 (STPO) - Body ground | Brake pedal depressed | 11 to 14 V |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
The connector is securely connected.
Disconnect the A39 skid control ECU (brake actuator assembly) connector.
Check both the connector case and the terminals for deformation and corrosion.
No deformation or corrosion.
Check that the stop lights come on when the brake pedal is depressed.
The stop lights illuminate.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
| *a | Front view of wire harness connector
(to Rear Combination Light Socket and Wire LH) |
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
The connector is securely connected.
Disconnect the A39 skid control ECU (brake actuator assembly) connector.
Disconnect the N18 rear combination light socket and wire LH connector.
Check both the connector case and the terminals for deformation and corrosion.
No deformation or corrosion.
Measure the voltage according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| N18-2 (B) - Body ground | Brake pedal depressed | 11 to 14 V |
| Proceed to |
|---|
| OK |
| NG |
OK
Refer to "Left or right stop light does not illuminate" of problem symptoms table.
for SFTM Made: Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (for SFTM Made)>PROBLEM SYMPTOMS TABLE202405,202409,_59,_083096,_0694052,RM100000002LQLG,202409,999999,_59,_083096,_0402622,RM100000002NQ37,
for GTMC Made: Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (for GTMC Made)>PROBLEM SYMPTOMS TABLE202405,202409,_59,_083096,_0694051,RM100000002LQMC,202409,999999,_59,_083096,_0402622,RM100000002NQ37,
NG
| *a | Front view of wire harness connector
(to Rear Combination Light Socket and Wire RH) |
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
The connector is securely connected.
Disconnect the A39 skid control ECU (brake actuator assembly) connector.
Disconnect the N18 rear combination light socket and wire LH connector.
Disconnect the M14 rear combination light socket and wire RH connector.
Check both the connector case and the terminals for deformation and corrosion.
No deformation or corrosion.
Measure the voltage according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| M14-2 (B) - Body ground | Brake pedal depressed | 11 to 14 V |
| Proceed to |
|---|
| OK |
| NG |
OK
Refer to "Left or right stop light does not illuminate" of problem symptoms table.
for SFTM Made: Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (for SFTM Made)>PROBLEM SYMPTOMS TABLE202405,202409,_59,_083096,_0694052,RM100000002LQLG,202409,999999,_59,_083096,_0402622,RM100000002NQ37,
for GTMC Made: Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (for GTMC Made)>PROBLEM SYMPTOMS TABLE202405,202409,_59,_083096,_0694051,RM100000002LQMC,202409,999999,_59,_083096,_0402622,RM100000002NQ37,
NG
| *a | Front view of wire harness connector
(to Center Stop Light Cord Assembly) |
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
The connector is securely connected.
Disconnect the A39 skid control ECU (brake actuator assembly) connector.
Disconnect the N18 rear combination light socket and wire LH connector.
Disconnect the M14 rear combination light socket and wire RH connector.
Disconnect the g1 center stop light cord assembly connector.
Check both the connector case and the terminals for deformation and corrosion.
No deformation or corrosion.
Measure the voltage according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| g1-2 (STP) - Body ground | Brake pedal depressed | 11 to 14 V |
| Proceed to |
|---|
| OK |
| NG |
OK
Refer to "High mounted stop light does not illuminate" of problem symptoms table.
for SFTM Made: Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (for SFTM Made)>PROBLEM SYMPTOMS TABLE202405,202409,_59,_083096,_0694052,RM100000002LQLG,202409,999999,_59,_083096,_0402622,RM100000002NQ37,
for GTMC Made: Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (for GTMC Made)>PROBLEM SYMPTOMS TABLE202405,202409,_59,_083096,_0694051,RM100000002LQMC,202409,999999,_59,_083096,_0402622,RM100000002NQ37,
NG
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
The connector is securely connected.
Disconnect the A39 skid control ECU (brake actuator assembly) connector.
Disconnect the A40 stop light switch assembly connector.
Disconnect the N18 rear combination light socket and wire LH connector.
Disconnect the M14 rear combination light socket and wire RH connector.
Disconnect the g1 center stop light cord assembly connector.
Check both the connector case and the terminals for deformation and corrosion.
No deformation or corrosion.
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A40-1 (OUT) - N18-2 (B) | Always | Below 1 Ω |
| A40-1 (OUT) or N18-2 (B) - Body ground | Always | 10 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG