When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal). Refer to See: Cruise Control\Description and Operation\System Diagram for the ASCD function.
ASCD BRAKE SWITCH
Diagnosis Procedure
1.CHECK OVERALL FUNCTION-I
Check which type of transmission the vehicle is equipped with.
Which type of transmission?
CVT >> GO TO 2.
M/T >> GO TO 6. 2.CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
Check the continuity between ASCD brake switch harness connector and ECM harness connector.
Also check harness for short to ground and short to power. Is the Inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. 5.CHECK ASCD BRAKE SWITCH
Refer to See: Component Inspection (ASCD Brake Switch)
Is the Inspection result normal?
YES >> GO TO 13.
NO >> Replace ASCD brake switch. 6.CHECK ASCD BRAKE SWITCH CIRCUIT
Check the continuity between ASCD brake switch harness connector and ASCD clutch switch harness connector.
Also check harness for short to ground and short to power. Is the Inspection result normal?
YES >> GO TO 10.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. 10.CHECK ASCD BRAKE SWITCH
Refer to See: Component Inspection (ASCD Brake Switch)
Is the Inspection result normal?
YES >> GO TO 13.
NO >> Replace ASCD brake switch. 11.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT