C161F

Code No.C161F: AWC actuator protection 1

CAUTION:

- If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.

- Whenever the ECU is replaced, ensure that the CAN bus lines are normal.

OPERATION

The AWC-ECU calculates the electronic control coupling (front) temperature by the information of the electronic control coupling (front) control amount, outside temperate, etc. If it is detected that the electronic control coupling (Front) temperature becomes extremely high, the high fluid temperature warning is displayed on the warning indicator.

DIAGNOSTIC TROUBLE CODE SET CONDITIONS

This diagnostic trouble code is set when the control is suspended to protect the electronic control coupling (front).

PROBABLE CAUSES

- Electronic control coupling (front) protection control status

- Severe driving

- Electronic control coupling (front) failure (clutch slippage, etc.)

- Outside temperature signal failure

- Wheel speed signal failure

- Engine-related failure (engine speed signal failure)

- Ignition off time signal failure

DIAGNOSTIC PROCEDURE

STEP 1. Check whether the diagnostic trouble code is reset.

(1)To release the electronic control coupling (front) protection control, leave the vehicle for 15 minutes or longer after the high fluid temperature warning on the warning indicator disappears.

(2)Erase the diagnostic trouble code.

(3)Carry out the test drive.
NOTE:
Do not carry out the severe test drive.

(4)Check if the diagnostic trouble code is set.

Q. Is diagnostic trouble code No.C161F set?

YES Go to Step 2.
NO This diagnosis is complete.
STEP 2. M.U.T.-III CAN bus diagnostics.

Use scan tool to perform the CAN bus diagnosis.

Q. Is the check result normal?

YES Go to Step 4.
NO Repair the CAN bus lines. CAN Bus Diagnostics Chart). After repairing the CAN bus line, go to Step 3.
STEP 3. Check whether the diagnostic trouble code is reset.

Q. Is diagnostic trouble code No.C161F set?

YES Go to Step 4.
NO This diagnosis is complete.
STEP 4. M.U.T.-III data list

Item 12: Engine speed (Refer to Data List Reference Table).

Q. Is the check result normal?

YES Go to Step 5.
NO Perform the troubleshooting for the engine control system. Multiport Fuel Injection (MFI)).
STEP 5. M.U.T.-III data list

Check the following data list. (Refer to Data List Reference Table).

- Item No.21: Wheel speed sensor [FL]

- Item No.22: Wheel speed sensor [FR]

- Item No.23: Wheel speed sensor [RL]

- Item No.24: Wheel speed sensor [RR]

Q. Is the check result normal?

YES Go to Step 6.
NO Perform the troubleshooting for the ASC. Active Stability Control System (ASC)).
STEP 6. M.U.T.-III data list

Check the following data list. (Refer to Data List Reference Table).

- Item No.34: Ambient temperature (CAN input)

- Item No.35: Ignition off time (CAN input)

Q. Is the check result normal?

YES Go to Step 7.
NO Perform the troubleshooting for the ETACS. Electronic Time and Alarm Control System (ETACS)).
STEP 7. Check of the electronic control coupling (Front)

Refer to Electronic Control Coupling (Front) Operation Check [Vehicles with S-AWC].

Q. Is the check result normal?

YES Go to Step 8.
NO Replace the transfer assembly (Refer to Transfer Assembly Removal and Installation [Vehicles with S-AWC]).
STEP 8. Check whether the diagnostic trouble code is reset.

(1)To release the electronic control coupling (front) protection control, leave the vehicle for 15 minutes or longer after the high fluid temperature warning on the warning indicator disappears.

(2)Erase the diagnostic trouble code.

(3)Carry out the test drive.
NOTE:
Do not carry out the severe test drive.

(4)Check if the diagnostic trouble code is set.

Q. Is diagnostic trouble code No.C161F set?

YES Replace the AWC-ECU. (Refer to AWC-ECU Removal and Installation).
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions).