C1604

C1604 TORQUE SENSOR





DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Turn the ignition switch OFF to ON.
2. Perform "EPS" self-diagnosis.
Is DTC "C1604" detected?
YES - Proceed to diagnosis procedure. C1604.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK TORQUE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF to ON.

CAUTION:
Never start the engine.
2. Check voltage between torque sensor harness connector terminals and ground.

CAUTION:
Steering wheel is neutral position. (There is no steering force.)





Is the inspection result normal?
YES - GO TO 2.
NO - Perform the trouble diagnosis for battery power supply circuit. C1601.
2.CHECK TORQUE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between torque sensor harness connector terminal and ground.

CAUTION:
Steering wheel is neutral position. (There is no steering force.)





Is the inspection result normal?
YES - GO TO 3.
NO - Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK TORQUE SENSOR SIGNAL
1. Turn ignition switch OFF to ON.
2. Check continuity between torque sensor harness connector terminal and ground.

CAUTION:
Steering wheel is neutral position. (There is no steering force.)





Is the inspection result normal?
YES - GO TO 4.
NO - Torque sensor is malfunction. Replace steering column assembly. Exploded View.
4.CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect torque sensor harness connector.
3. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal.
Is the inspection result normal?
YES - Replace EPS control unit. Exploded View.
NO - Repair or replace error-detected parts.




Special Repair Requirement
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the steering column assembly. Special Repair Requirement.
- END