C1604
C1604 TORQUE SENSORDescription
Torque sensor detects steering wheel turning force and outputs sensor signal to EPS control unit
DTC Logic
DTC DETECTION LOGIC
C1604:
DTC CONFIRMATION PROCEDURE
1. ERASE DTC MEMORY
With CONSULT-III
1. Record DTC.
2. Erase DTC once.
NOTE: After erasing DTC record, currently occurred DTC can be detected by reading out DTC again.
>> GO TO 2.
2. PERFORM DTC CONFIRMATION
With CONSULT-III
1. Turn the ignition switch ON (READY).
2. Steer 360° leftward and rightward slowly.
3. Return the steering wheel to the straight-ahead position.
4. Perform the self-diagnosis.
Is DTC "C1604" detected?
YES >> Proceed to STC-15, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1. CHECK TORQUE SENSOR CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect EPS control unit harness connector and torque sensor harness connector.
3. Check the continuity between EPS control unit harness connector and torque sensor harness connector.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the harnesses or connectors.
2. CHECK TORQUE SENSOR
Check the resistance between torque sensor harness connector terminals. Refer to STC-17, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Torque sensor is malfunctioning. Replace steering gear assembly.
3. CHECK EPS MOTOR ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR CALIBRATION PERFORMED
Check if EPS motor angle sensor initialization and torque sensor calibration are performed before the self-diagnosis.
Were the above items performed before the self-diagnosis?
YES >> GO TO 5.
NO >> GO TO 4.
4. PERFORM SELF-DIAGNOSIS AGAIN
With CONSULT-III
Perform "DTC CONFIRMATION PROCEDURE" (self-diagnosis) again. Refer to STC-15, "DTC Logic".
Which DTC is detected?
C1604 >> Replace EPS control unit.
Except C1604 >> Check the malfunctioning system.
No DTC >> INSPECTION END
5. INITIALIZE EPS MOTOR ANGLE SENSOR AND CALIBRATE TORQUE SENSOR AGAIN
With CONSULT-III
Perform EPS motor angle sensor initialization and torque sensor calibration again. Refer to STC-5, "EPS MOTOR ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR CALIBRATION: Special Repair Requirement". EPS Motor Angle Sensor Initialization and Torque Sensor Calibration
Were they performed correctly?
YES >> GO TO 6.
NO >> Check the malfunctioning cause.
6. PERFORM SELF-DIAGNOSIS AGAIN
With CONSULT-III
Perform "DTC CONFIRMATION PROCEDURE" (self-diagnosis) again. Refer to STC-15, "DTC Logic".
Is DTC "C1604" detected?
YES >> GO TO 7.
NO >> INSPECTION END
7. CHECK THE NUMBER OF WORK SUPPORT IMPLEMENTATIONS
Check the numbers of EPS motor angle sensor initialization and torque sensor calibration.
How many times were they implemented?
Once/twice >> GO TO 5.
More than twice >> Replace EPS control unit. Then GO TO 8.
8. INITIALIZE EPS MOTOR ANGLE SENSOR AND CALIBRATE TORQUE SENSOR AGAIN
With CONSULT-III
Perform EPS motor angle sensor initialization and torque sensor calibration again. Refer to STC-5, "EPS MOTOR ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR CALIBRATION: Special Repair Requirement". EPS Motor Angle Sensor Initialization and Torque Sensor Calibration
Were they performed correctly?
YES >> GO TO 9.
NO >> Check the malfunctioning cause.
9. PERFORM SELF-DIAGNOSIS AGAIN
With CONSULT-III
Perform "DTC CONFIRMATION PROCEDURE" (self-diagnosis) again. Refer to STC-15, "DTC Logic".
Is DTC "C1604" detected?
YES >> GO TO 10.
NO >> INSPECTION END
10. CHECK THE NUMBER OF WORK SUPPORT IMPLEMENTATIONS
Check the numbers of EPS motor angle sensor initialization and torque sensor calibration after replacement of EPS control unit.
How many times were they implemented?
Once/twice >> GO TO 8.
More than twice >> Torque sensor is malfunctioning. Replace steering gear assembly.
Component Inspection
1. CHECK TORQUE SENSOR
1. Turn the ignition switch OFF.
2. Disconnect torque sensor harness connector.
3. Check the resistance between torque sensor harness connector terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Torque sensor is malfunctioning. Replace steering gear assembly.
Special Repair Requirement
1. INITIALIZE EPS MOTOR ANGLE SENSOR AND CALIBRATE TORQUE SENSOR AGAIN
Always perform EPS motor angle sensor initialization and torque sensor calibration after replacing EPS control unit or steering gear assembly. Refer to STC-5, "EPS MOTOR ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR CALIBRATION: Special Repair Requirement". EPS Motor Angle Sensor Initialization and Torque Sensor Calibration
>> END