Open in Stop Light Switch Circuit - Vehicle Stability Control System

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1249/49: Open in Stop Light Switch Circuit

DTC C1249/49 - Open in Stop Light Switch Circuit

DESCRIPTION





WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

1. CHECK STOP LIGHT SWITCH OPERATION
(a) Check that the stop light comes on when the brake pedal is depressed and goes off when the brake pedal is released.
OK:





HINT: Check the stop light bulb as it may have burnt out.

NG -- INSPECT STOP LIGHT SWITCH
OK -- Continue to next step.
2. INSPECT SKID CONTROL ECU (STP1 TERMINAL)
(a) Disconnect the skid control ECU connector.





(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - SKID CONTROL ECU)
OK -- Continue to next step.
3. RECONFIRM DTC
(a) Clear the DTCs .
(b) Turn the ignition switch to the ON position.
(c) Are the same DTCs detected?
Result:





NOTE: When replacing the brake actuator assembly, perform zero point calibration .

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- REPLACE BRAKE ACTUATOR ASSEMBLY
4. INSPECT STOP LIGHT SWITCH
(a) Disconnect the stop light switch assembly connector.





(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE STOP LIGHT SWITCH
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - SKID CONTROL ECU)
(a) Disconnect the stop light switch connector and skid control ECU connector.





(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NOTE: When replacing the brake actuator assembly, perform zero point calibration .

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE BRAKE ACTUATOR ASSEMBLY