ASCD BRAKE SWITCH

Description

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: 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

1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.

4. Check the voltage between ASCD brake switch harness connector and ground.

• Fuse block (J/B) connector E6
• 10 A fuse (No. 3)
• Harness for open or short between ASCD brake switch and fuse >> Repair open circuit, short to ground or short to power in harness or connectors.

4.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ASCD brake switch harness connector and ECM harness connector.

4. 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: Powertrain Management\Computers and Control Systems\Testing and Inspection\Component Tests and General Diagnostics\ASCD Brake Switch\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

1. Turn ignition switch OFF.
2. Disconnect ASCD clutch switch harness connector.
3. Turn ignition switch ON.

4. Check the voltage between ASCD clutch switch harness connector and ground.

1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.

4. Check the voltage between ASCD brake switch harness connector and ground.

• Fuse block (J/B) connector E6
• 10 A fuse (No. 3)
• Harness for open or short between ASCD brake switch and fuse >> Repair open circuit, short to ground or short to power in harness or connectors.

9.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.
2. Check the continuity between ASCD brake switch harness connector and ASCD clutch switch harness connector.

3. 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: Powertrain Management\Computers and Control Systems\Testing and Inspection\Component Tests and General Diagnostics\ASCD Brake Switch\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

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ASCD clutch switch harness connector and ECM harness connector.

4. Also check harness for short to ground and short to power. Is the Inspection result normal?

YES >> GO TO 12.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
12.CHECK ASCD CLUTCH SWITCH
Refer to See: Component Inspection (ASCD Clutch Switch)
Is the Inspection result normal?
YES >> GO TO 13.
NO >> Replace ASCD clutch switch.
13.CHECK INTERMITTENT INCIDENT
Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.
>> Inspection END