Code No.U1197: Coding data unavailable
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- If diagnosis code No. U1197 is set, diagnose the CAN bus lines.
- When replacing the ECU, always check that the communication circuit is normal.
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TROUBLE JUDGEMENT
This diagnosis code will be set when the variant coding for the ETACS-ECU has not been implemented.
PROBABLE CAUSES
- Variant coding not performed
- Malfunction of ETACS-ECU
- Malfunction of multivision display
- Malfunction of CAN bus
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 
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STEP 2. M.U.T.-III other system diagnosis code.
Check if diagnosis code is set in the ETACS-ECU.
Q.
Is the diagnosis code set?
Diagnose the ETACS.
Go to Step 3.
STEP 3. ETACS-ECU coding data check.
Using M.U.T.-III, check if any abnormality is present to the coding data which are stored in the ETACS-ECU.
Q.
Is the check result normal?
Go to Step 4.
Replace the ETACS-ECU.
STEP 4. Diagnosis code recheck.
Check again if the diagnosis code is set in the multivision display.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch to "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 the multivision display (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction).