DESCRIPTION
When the stop light switch is turned on, current flows to the stop lights to illuminate them. In emergency braking, the brake control system blinks all stop lights to alert a following driver, and reduces the possibility of rear-end collision.
WIRING DIAGRAM
INSPECTION PROCEDURE
Tech Tips
Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.
PROCEDURE
CHECK FOR DTC (BRAKE CONTROL SYSTEM)
Clear the DTCs Click here.
Check for DTCs Click here.
OK |
---|
DTCs output does not occur. |
B |
GO TO BRAKE CONTROL SYSTEM Click here |
A |
INSPECT STOP LIGHT SWITCH ASSEMBLY
Remove the stop light switch Click here.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
NG |
REPLACE STOP LIGHT SWITCH ASSEMBLY Click here |
OK |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - BATTERY)
*1 | Front view of wire harness connector (to Stop Light Switch) |
Disconnect the A1 stop light switch connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (STOP LIGHT CONTROL RELAY - BATTERY)
*1 | Front view of wire harness connector (to Stop Light Control Relay) |
Disconnect the A12 stop light control relay connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK STOP LIGHT OPERATION
Check the stop light operation.
Result | Proceed to |
---|---|
All stop lights do not blink | A |
Stop lights illuminate | B |
Stop lights blink | C |
B |
CHECK HARNESS AND CONNECTOR (STOP LIGHT CONTROL RELAY - REAR COMBINATION LIGHT AND CENTER STOP LIGHT) Click here |
C |
CHECK STOP LIGHT Click here |
A |
CHECK HARNESS AND CONNECTOR (STOP LIGHT CONTROL RELAY - REAR COMBINATION LIGHT AND CENTER STOP LIGHT)
Disconnect the A12 stop light control relay connector.
*1 | Front view of wire harness connector (to Stop Light Control Relay) |
*2 | Front view of wire harness connector (to Rear Combination Light) |
*3 | for LH |
*4 | for RH |
*5 | Front view of wire harness connector (to Center Stop Light [for Sedan]) |
*6 | Front view of wire harness connector (to Center Stop Light [for Wagon]) |
Rear Combination Light:
Disconnect the rear G6 or G5 combination light connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
for LH | ||||||||||
|
||||||||||
for RH | ||||||||||
|
Center Stop Light:
Disconnect the Z13 or Z14 center stop light connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
for Sedan | ||||||||||
|
||||||||||
for Wagon | ||||||||||
|
Result | Proceed to |
---|---|
OK (for LHD) | A |
OK (for RHD) | B |
NG | C |
B |
REPLACE STOP LIGHT CONTROL RELAY ASSEMBLY Click here |
C |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
A |
REPLACE STOP LIGHT CONTROL RELAY ASSEMBLY Click here
CHECK HARNESS AND CONNECTOR (STOP LIGHT CONTROL RELAY - REAR COMBINATION LIGHT AND CENTER STOP LIGHT)
Disconnect the A12 stop light control relay connector.
Disconnect the G6 or G5 rear combination light connectors.
*1 | Front view of wire harness connector (to Stop Light Control Relay) |
*2 | Front view of wire harness connector (to Rear Combination Light) |
*3 | for LH |
*4 | for RH |
*5 | Front view of wire harness connector (to Center Stop Light [for Sedan]) |
*6 | Front view of wire harness connector (to Center Stop Light [for Wagon]) |
Disconnect the Z13 or Z14 center stop light connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
for Sedan | |||||||||||||||
|
|||||||||||||||
for Wagon | |||||||||||||||
|
Result | Proceed to |
---|---|
OK (for LHD) | A |
OK (for RHD) | B |
NG | C |
B |
REPLACE STOP LIGHT CONTROL RELAY ASSEMBLY Click here |
C |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
A |
REPLACE STOP LIGHT CONTROL RELAY ASSEMBLY Click here
CHECK STOP LIGHT
With the skid control ECU connector disconnected, check the illumination of the stop lights when depressing the brake pedal.
OK |
---|
Stop lights operate normally when the brake pedal is depressed. |
Result | Proceed to |
---|---|
OK (w/ VSC) | A |
OK (w/o VSC) | B |
NG (for LHD) | C |
NG (for RHD) | D |
B |
REPLACE BRAKE ACTUATOR ASSEMBLY Click here |
C |
REPLACE STOP LIGHT CONTROL RELAY ASSEMBLY Click here |
D |
REPLACE STOP LIGHT CONTROL RELAY ASSEMBLY Click here |
A |
REPLACE BRAKE ACTUATOR ASSEMBLY Click here