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 control unit 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.
10 terminal.
- 60A fusible link (M) open
- Harness for short between 60A fusible link (M) and power steering control unit harness connector No. 10 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 or ignition switch.
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 "MOTOR VOLT", and perform the battery voltage inspection.





Is the inspection result normal?
YES - GO TO 4.
NO - Replace EPS control unit. Service and Repair.
4.CHECK MOTOR VOLTAGE SIGNAL (2)
With CONSULT-III
Select "MOTOR VOLT" in "DATA MONITOR" of the EPS control unit. Check motor 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. Electrical Diagrams.