| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM10000000155UU |
| Model Year Start: 2018 | Model: Camry | Prod Date Range: [06/2017 - 10/2020] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM (w/o Electric Parking Brake System): C1380; Stop Light Control Relay Malfunction; 2018 - 2020 MY Camry [06/2017 - 10/2020] | ||
|
DTC |
C1380 |
Stop Light Control Relay Malfunction |
DESCRIPTION
When the skid control ECU (brake actuator assembly) applies the brakes after receiving a brake request signal from the pre-collision system, dynamic radar cruise control system or secondary collision brake system, the skid control ECU (brake actuator assembly) operates the stop light control relay (stop light switch assembly) to illuminate the stop lights.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C1380 |
Stop Light Control Relay Malfunction |
Either condition is met:
|
|
DTC Detection Conditions: C1380
|
Vehicle Condition |
|||
|---|---|---|---|
|
Pattern 1 |
Pattern 2 |
||
|
Diagnosis Condition |
The voltage at the +BS terminal is between 10 V or more. |
○ |
○ |
|
Malfunction Status |
When the stop light control relay (stop light switch assembly) drive output (STPO) is on, a signal is not input to the STP terminal. |
○ |
- |
|
When 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. |
- |
○ |
|
|
Detection Time |
5 seconds or more |
5 seconds or more |
|
|
Number of Trips |
1 trip |
1 trip |
|
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration.
Click here
![2018 - 2020 MY Camry [06/2017 - 10/2020]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM (w/o Electric Parking Brake System): CALIBRATION](/t3Portal/stylegraphics/info.gif)
- Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (BS1 VOLTAGE VALUE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Data List.
Chassis > ABS/VSC/TRAC/EPB > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
BS1 Voltage Value |
+BS voltage value |
Min.: 0.00 V, Max.: 20.00 V |
- |
Changes in proportion to battery voltage |
Chassis > ABS/VSC/TRAC/EPB > Data List
|
Tester Display |
|---|
|
BS1 Voltage Value |
(d) Take a note of the +BS voltage value.
HINT:
The noted +BS voltage value is used in a later step.
|
|
2. |
CHECK HARNESS AND CONNECTOR (STP2, STPO AND STP TERMINAL) |
|
(a) Turn the ignition switch off. |
|
(b) Make sure that there is no looseness at the locking part and the connecting part of the connector.
OK:
The connector is securely connected.
(c) Disconnect the A33 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 |
|---|---|---|
|
A33-30 (STP) - Body ground |
Stop light switch assembly on (Brake pedal depressed) |
(+BS x 0.85) to 14 V* |
|
A33-30 (STP) - Body ground |
Stop light switch assembly off (Brake pedal released) |
Below 1.5 V |
|
A33-3 (STPO) - Body ground |
Always |
11 to 14 V |
|
A33-22 (STP2) - Body ground |
Stop light switch assembly on (Brake pedal depressed) |
(+BS x 0.85) to 14 V* |
|
A33-22 (STP2) - Body ground |
Stop light switch assembly off (Brake pedal released) |
Below 1.5 V |
HINT:
*: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.
|
Result |
Proceed to |
|---|---|
|
All terminal voltages are normal |
A |
|
Only STP terminal voltage abnormal |
B |
|
Only STPO terminal voltage abnormal |
C |
|
Only STP2 terminal voltage abnormal |
D |
|
STPO terminal and STP2 terminal voltage abnormal |
E |
| B |
|
| C |
|
| D |
|
| E |
|
|
|
3. |
PERFORM ACTIVE TEST USING TECHSTREAM (STOP LIGHT RELAY) |
(a) Reconnect the A33 skid control ECU (brake actuator assembly) connector.
(b) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Active Test.
Chassis > ABS/VSC/TRAC/EPB > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Stop Light Relay |
Stop light control relay (Stop light switch assembly) |
Relay OFF/ON |
Stop lights come on |
Chassis > ABS/VSC/TRAC/EPB > Active Test
|
Tester Display |
|---|
|
Stop Light Relay |
OK:
Stop light turns ON/OFF in response to the Techstream operation
| NG |
|
|
|
4. |
CHECK FOR DTC |
(a) Clear the DTCs.
Chassis > ABS/VSC/TRAC/EPB > Clear DTCs
(b) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Active Test.
Chassis > ABS/VSC/TRAC/EPB > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Stop Light Relay |
Stop light control relay (Stop light switch assembly) |
Relay OFF/ON |
Stop lights come on |
Chassis > ABS/VSC/TRAC/EPB > Active Test
|
Tester Display |
|---|
|
Stop Light Relay |
(c) According to the display on the Techstream, perform the Active Test.
(d) Check if the same DTC is output.
Chassis > ABS/VSC/TRAC/EPB > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
C1380 is output |
A |
|
C1380 is not output |
B |
| A |
|
| B |
|
USE SIMULATION METHOD TO CHECK
|
|
5. |
INSPECT BRAKE ACTUATOR ASSEMBLY |
(a) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Active Test.
Chassis > ABS/VSC/TRAC/EPB > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Stop Light Relay |
Stop light control relay (Stop light switch assembly) |
Relay OFF/ON |
Stop lights come on |
Chassis > ABS/VSC/TRAC/EPB > Active Test
|
Tester Display |
|---|
|
Stop Light Relay |
|
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| OK |
|
| NG |
|
|
6. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - ECM) |
|
(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 A24 ECM 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 |
|---|---|---|
|
A33-30 (STP) - Body ground |
Stop light switch assembly on (Brake pedal depressed) |
(+BS x 0.85) to 14 V* |
|
A33-30 (STP) - Body ground |
Stop light switch assembly off (Brake pedal released) |
Below 1.5 V |
HINT:
*: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (w/ Smart Key System) |
B |
|
NG (w/o Smart Key System) |
C |
| A |
|
REPLACE ECM
|
| C |
|
|
|
7. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - SMART KEY ECU ASSEMBLY) |
|
(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 R8 certification ECU (smart key ECU 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 |
|---|---|---|
|
A33-30 (STP) - Body ground |
Stop light switch assembly on (Brake pedal depressed) |
(+BS x 0.85) to 14 V* |
|
A33-30 (STP) - Body ground |
Stop light switch assembly off (Brake pedal released) |
Below 1.5 V |
HINT:
*: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.
| OK |
|
|
|
8. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - SHIFT LOCK CONTROL UNIT ASSEMBLY) |
|
(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 K27 shift lock control ECU (shift lock control unit 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 |
|---|---|---|
|
A33-30 (STP) - Body ground |
Stop light switch assembly on (Brake pedal depressed) |
(+BS x 0.85) to 14 V* |
|
A33-30 (STP) - Body ground |
Stop light switch assembly off (Brake pedal released) |
Below 1.5 V |
HINT:
*: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.
| OK |
|
|
|
9. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY) |
|
(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 A37 stop light switch 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 |
|---|---|---|
|
A33-30 (STP) - Body ground |
Always |
Below 1.5 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A33-30 (STP) - A37-3 (L) |
Always |
Below 1 Ω |
|
A33-30 (STP) or A37-3 (L) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
11. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - SHIFT LOCK CONTROL UNIT ASSEMBLY) |
|
(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 K28 shift lock control ECU (shift lock control unit 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 |
|---|---|---|
|
A33-30 (STP) - Body ground |
Stop light switch assembly on (Brake pedal depressed) |
(+BS x 0.85) to 14 V* |
|
A33-30 (STP) - Body ground |
Stop light switch assembly off (Brake pedal released) |
Below 1.5 V |
HINT:
*: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.
| OK |
|
|
|
12. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY) |
|
(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 A37 stop light switch 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 |
|---|---|---|
|
A33-30 (STP) - Body ground |
Always |
Below 1.5 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
13. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A33-30 (STP) - A37-3 (L) |
Always |
Below 1 Ω |
|
A33-30 (STP) or A37-3 (L) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
14. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY) |
(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 A37 stop light switch assembly connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A33-3 (STPO) - A37-4 (ACC) |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
15. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - REAR COMBINATION LIGHT ASSEMBLY LH) |
|
(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 W13 rear combination light assembly LH 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 |
|---|---|---|
|
A33-22 (STP2) - Body ground |
Stop light switch assembly on (Brake pedal depressed) |
(+BS x 0.85) to 14 V* |
|
A33-22 (STP2) - Body ground |
Stop light switch assembly off (Brake pedal released) |
Below 1.5 V |
HINT:
*: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.
| OK |
|
|
|
16. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - REAR COMBINATION LIGHT ASSEMBLY RH) |
|
(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 W12 rear combination light assembly RH 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 |
|---|---|---|
|
A33-22 (STP2) - Body ground |
Stop light switch assembly on (Brake pedal depressed) |
(+BS x 0.85) to 14 V* |
|
A33-22 (STP2) - Body ground |
Stop light switch assembly off (Brake pedal released) |
Below 1.5 V |
HINT:
*: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.
| OK |
|
|
|
17. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - CENTER STOP LIGHT SET) |
|
(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 R47 center stop light (center stop light set) 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 |
|---|---|---|
|
A33-22 (STP2) - Body ground |
Stop light switch assembly on (Brake pedal depressed) |
(+BS x 0.85) to 14 V* |
|
A33-22 (STP2) - Body ground |
Stop light switch assembly off (Brake pedal released) |
Below 1.5 V |
HINT:
*: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.
| OK |
|
|
|
18. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY) |
|
(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 A37 stop light switch 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 |
|---|---|---|
|
A33-22 (STP2) - Body ground |
Always |
Below 1.5 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
19. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A37-1 (OUT) - A33-22 (STP2) |
Always |
Below 1 Ω |
|
A37-1 (OUT) or A33-22 (STP2) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
20. |
CHECK STOP LIGHT SWITCH ASSEMBLY POWER SOURCE 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. |
|
(b) Disconnect the A37 stop light switch assembly connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A37-2 (GND) - Body ground |
Always |
Below 1 Ω |
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A37-7 (B) - Body ground |
Always |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
21. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A33-3 (STPO) or A37-4 (ACC) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|