Diagnosis Procedure
- CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect ASCD brake switch harness connector.
- Turn ignition switch ON.
- Check the voltage between ASCD brake switch harness connector and ground.
ASCD brake switch
Ground
Voltage
Connector
Terminal
E109
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 2.
- DETECT MALFUNCTIONING PART
Check the following.
- 10 A fuse (No. 3)
- Harness for open or short between ASCD brake switch and fuse
- Loose or poor connection for each connector and harness
Repair open circuit or short to ground in harness or connectors.
- CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between ASCD brake switch harness connector and ECM harness connector.
ASCD brake switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E109
2
E20
140
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 5.
NO
GO TO 4.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness for open or short between ECM and ASCD brake switch
- Loose or poor connection for each connector and harness
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK ASCD BRAKE SWITCH
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 6.
NO
Replace ASCD brake switch. Refer to BRAKE PEDAL : Removal & Installation .
- CHECK INTERMITTENT INCIDENT
Refer to Inspection .
INSPECTION END