C1601

C1601 BATTERY POWER SUPPLY





Description
Power is supplied from the battery to EPS control unit.




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 "C1601" detected?
YES - Proceed to diagnosis procedure. C1601.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK EPS CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EPS control unit harness connector.
3. Check continuity between EPS control unit harness connector terminal and ground.





4. Connect EPS control unit harness connector.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair open circuit or short to ground or short to power in harness or connectors.
2.CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT
1. Check voltage between EPS control unit harness connector terminals and ground.





2. Turn ignition switch ON.

CAUTION:
Never start the engine.
3. Check voltage between EPS control unit harness connector terminals and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Check the following. If any items are damaged, repair or replace damaged parts.
- 10A fuse (#2) open
- Harness for short between 10A fuse (#2) and power steering control unit harness connector No.
4 terminal.
- 60A fusible link (M) open
- Harness for short between 60A fusible link (M) and power steering control unit harness connector No. 4 terminal.
- Harness for open between ignition switch and power steering control unit harness connector No. 17 terminal.
- Harness for open between battery and power steering control unit harness connector No. 17 terminal.
- Battery, ignition switch or alternator.
3.CHECK BATTERY VOLTAGE SIGNAL (1)
With CONSULT-III
1. Connect EPS control unit harness connector.
2. Start the engine.

CAUTION:
Stop the vehicle.
3. Select "EPS", "DATA MONITOR" and "BATTERY VOLT", and perform the battery voltage inspection.





Is the inspection result normal?
YES - GO TO 4.
NO - Replace EPS control unit. Exploded View.
4.CHECK BATTERY VOLTAGE SIGNAL (2)
With CONSULT-III
Select "BATTERY VOLT" in "DATA MONITOR" of the EPS control unit. Check battery voltage with the steering wheel fully turned leftward or rightward.
Is the value in "DATA MONITOR""between 9 V and 17.5 V"?
YES - Check pin terminal and connection of each harness connector for damage or loose connection.
NO - Check battery power supply and ignition power supply. Battery Power Supply, Ignition Power Supply.




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