DESCRIPTION
The skid control ECU (housed in the actuator assembly) inputs the stop light switch signal and the condition of brake operation.
The skid control ECU has an open detection circuit, which outputs this DTC when detecting an open in the stop light input line or the ground line of the stop light circuit with the stop light switch off (brake pedal not depressed).
DTC Code | DTC Detection Condition | Trouble Area |
---|---|---|
C1249/49 | When either of the following is detected:
|
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
INSPECT STOP FUSE
Remove the STOP fuse from the instrument panel junction block.
Measure the resistance according to the value(s) in the table below.
Standard resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE STOP FUSE |
OK |
CHECK STOP LIGHT OPERATION
Install the STOP fuse.
Check that the stop light comes on when the brake pedal is depressed, and goes off when the brake pedal is released.
OK | ||||||
---|---|---|---|---|---|---|
|
NG |
INSPECT STOP LIGHT SWITCH (POWER SOURCE TERMINAL) Click here |
OK |
INSPECT SKID CONTROL ECU (STP TERMINAL)
Disconnect the skid control ECU connector.
Measure the voltage according to the value(s) in the table below.
Standard voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (STP CIRCUIT) |
OK |
INSPECT SKID CONTROL ECU (IG1 TERMINAL)
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard voltage | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) |
OK |
INSPECT SKID CONTROL ECU (GND TERMINAL)
Turn the ignition switch off.
Measure the resistance according to the value(s) in the table below.
Standard resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) |
OK |
RECONFIRM DTC
Reconnect the skid control ECU connector.
Clear the DTC Click here.
Start the engine.
Depress the brake pedal several times to test the stop light circuit.
Check if the same DTC is recorded Click here.
Result | ||||||
---|---|---|---|---|---|---|
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Tech Tips
If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Click here.
B |
REPLACE BRAKE ACTUATOR ASSEMBLY Click here |
A |
CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here
INSPECT STOP LIGHT SWITCH (POWER SOURCE TERMINAL)
Disconnect the 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 (POWER SOURCE CIRCUIT) |
OK |
INSPECT STOP LIGHT SWITCH
Measure the resistance according to the value(s) in the table below.
Standard resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
NG |
REPLACE STOP LIGHT SWITCH Click here |
OK |
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH)
Disconnect the skid control ECU connector.
Measure the resistance according to the value(s) in the table below.
Standard resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
RECONFIRM DTC
Reconnect the skid control ECU connector and the stop light switch connector.
Clear the DTC Click here.
Start the engine.
Depress the brake pedal several times to test the stop light circuit.
Check if the same DTC is recorded Click here.
Result | ||||||
---|---|---|---|---|---|---|
|
Tech Tips
If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Click here.
B |
REPLACE BRAKE ACTUATOR ASSEMBLY Click here |
A |
INSPECT LIGHTING SYSTEM (STOP LIGHT CIRCUIT)