Code No. C161F:
Electronic Control Coupling Solenoid (Front) Protection
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- If there is any prosetblem in the
CAN bus lines, an incorrect diagnosis 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.
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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.
DIAGNOSIS CODE SET CONDITIONS
This diagnosis 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
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STEP 1. Check whether the diagnosis code is set again.
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(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.
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(2)Erase the diagnosis code.
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(3)Carry out the test drive.
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Do not carry out the severe test drive.
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(4)Check if the diagnosis code is set.
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Q.
Is diagnosis code No.C161F set?
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 Go to Step 2.
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 This diagnosis is complete.
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STEP 2. M.U.T.-III CAN bus diagnostics.
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Use M.U.T.-III to perform the CAN bus diagnosis.
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Q.
Is the check result normal?
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Go to Step 4.
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Repair the CAN bus lines. (Refer to GROUP 54C -
Troubleshooting). After
repairing the CAN bus line, go to Step 3.
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STEP 3. Check whether the diagnosis code is set again.
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Q.
Is diagnosis code No.C161F set?
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Go to Step 4.
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This diagnosis is complete.
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STEP 4. M.U.T.-III data list
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Check the following data list. (Refer to  ).
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Q.
Is the check result normal?
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Go to Step 5.
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Perform the diagnosis for the engine control system. (Refer to GROUP 13D -
Troubleshooting).
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STEP 5. M.U.T.-III data list
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Check the following data list. (Refer to ).
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- 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>
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Q.
Is the check result normal?
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Go to Step 6.
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Perform the troubleshooting for the ASC. (Refer to GROUP 35C -
Troubleshooting ).
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STEP 6. M.U.T.-III data list
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Check the following data list. (Refer to ).
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- Item No.34: Ambient temperature (CAN input)
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- Item No.35: Ignition off time (CAN input)
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Q.
Is the check result normal?
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Go to Step 7.
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Perform the diagnosis for the ETACS. (Refer to GROUP 54A -
ETACS, Troubleshooting).
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STEP 7. Check of the electronic control coupling (Front)
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Refer to .
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Q.
Is the check result normal?
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Go to Step 8.
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Replace the transfer assembly (Refer to ).
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STEP 8. Check whether the diagnosis code is set again.
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(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.
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(2)Erase the diagnosis code.
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(3)Carry out the test drive.
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Do not carry out the severe test drive.
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(4)Check if the diagnosis code is set.
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Q.
Is diagnosis code No.C161F set?
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Replace the AWC-ECU. (Refer to ).
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Intermittent malfunction. (Refer to GROUP 00 -
How to Cope with Intermittent
Malfunction).
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