Code No.U0197 Hands-free cellular phone system CAN timeout
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- If the diagnosis code No. U0197 is set , be sure to diagnose the CAN bus line.
- When replacing the ECU, always check that the communication circuit is normal
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DIAGNOSTIC FUNCTION
If no signal from the hands free-ECU can be received, KOS-ECU sets the diagnosis code No. U0197.
PROBABLE CAUSES
- Malfunction of the CAN bus
- Malfunctions of hands free-ECU
- Malfunction of KOS-ECU
- Malfunction of ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting 
).
STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code is set to the hands free module.
Q.
Is the diagnosis code set?
Perform the diagnosis code troubleshooting to the hands free-ECU (Refer to ).
Go to Step 3.
STEP 3. M.U.T.-III other system diagnosis code
Check if the ETACS-ECU-related diagnosis code is set.
Q.
Is the diagnosis code set?
Perform troubleshooting for ETACS-ECU (Refer to GROUP 54A - ETACS - Troubleshooting ).
Go to Step 4.
STEP 4. Check whether the diagnosis code is reset.
Recheck if the diagnosis code is set.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace KOS-ECU and register the ID codes (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to cope with Intermittent Malfunction ).