Power Supply And Ground Circuit
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
1. CHECK ELECTRIC PARKING BRAKE CONTROL MODULE POWER SWITCH ON POWER SUPPLY
1.Turn the power switch OFF.
2.Disconnect electric parking brake control module harness connector.
3.Check the voltage between electric parking brake control module harness connector and ground.
4.Turn the power switch ON
CAUTION:
Never set the vehicle to READY.
5.Check the voltage between electric parking brake control module harness connector and ground.
Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.
2. CHECK ELECTRIC PARKING BRAKE CONTROL MODULE POWER SWITCH ON POWER SUPPLY CIR-
CUIT
1.Turn the power switch OFF.
2.Check the 10A fuse (#3).
3.Check the continuity and short circuit between electric parking brake control module harness connector terminal (5) and 10A fuse (#3).
Is the inspection result normal?
YES- Perform trouble diagnosis for power switch ON power supply. Refer to "Wiring Diagram ON POWER SUPPLY -" On Power Supply.
NO- Repair or replace error-detected parts.
3. CHECK MOTOR POWER SUPPLY
1.Turn the power switch OFF.
2.Check the voltage between electric parking brake control module harness connector and ground.
3.Turn the power switch ON
CAUTION:
Never set the vehicle to READY.
4.Check the voltage between electric parking brake control module harness connector and ground.
Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.
4. CHECK MOTOR POWER SUPPLY CIRCUIT
1.Turn the power switch OFF.
2.Check the 30A fuse (#36).
3.Check the continuity and short circuit between electric parking brake control module harness connector terminal (22) and 30A fuse (#36).
Is the inspection result normal?
YES- Perform trouble diagnosis for 12V battery power supply. Refer to "Wiring Diagram BATTERY POWER SUPPLY -" Battery Power Supply.
NO- Repair or replace error-detected parts.
5. CHECK ELECTRIC PARKING BRAKE CONTROL MODULE 12V BATTERY POWER SUPPLY
1.Turn the power switch OFF.
2.Check the voltage between electric parking brake control module harness connector and ground.
3.Turn the power switch ON
CAUTION:
Never set the vehicle to READY.
4.Check the voltage between electric parking brake control module harness connector and ground.
Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 6.
6. CHECK ELECTRIC PARKING BRAKE CONTROL MODULE 12V BATTERY POWER SUPPLY CIRCUIT
1.Turn the power switch OFF.
2.Check the 10A fuse (#18).
3.Check the continuity and short circuit between electric parking brake control module harness connector terminal (7) and 10A fuse (#18).
Is the inspection result normal?
YES- Perform trouble diagnosis for 12V battery power supply. Refer to "Wiring Diagram BATTERY POWER SUPPLY -" Battery Power Supply.
NO- Repair or replace error-detected parts.
7. CHECK ELECTRIC PARKING BRAKE CONTROL MODULE GROUND CIRCUIT
1.Turn the power switch OFF.
2.Check the continuity between electric parking brake control module harness connector and the ground.
Is the inspection result normal?
YES- GO TO 8.
NO- Repair or replace error-detected parts.
8. CHECK TERMINAL
Check the electric parking brake control module pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES- INSPECTION END
NO- Repair or replace error-detected parts.