Code No. U1197: Coding data unavailable
Diagnostic function
CVT-ECU checks that the coding information is normal.
JUDGEMENT CRITERIA
When the CVT-ECU cannot receive "programmed" signal.
PROBABLE CAUSES
- Malfunction of CAN bus line
- Variant coding for ETACS-ECU has not been implemented.
- Malfunction of ETACS-ECU
- Malfunction of CVT-ECU
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STEP 1. M.U.T.-III CAN bus diagnostics
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Use the M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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 Go to Step 2.
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 Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting  .)
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STEP 2. Use M.U.T.-III to confirm a diagnosis code of other systems.
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Check if a coding-related diagnosis code is stored in the ETACS-ECU.
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Q.
Is the diagnosis code stored?
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Diagnose the ETACS-ECU. (Refer to GROUP 54A - Troubleshooting )
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Go to Step 3.
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STEP 3. Diagnosis code recheck
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Check again if the diagnosis code is stored in the CVT-ECU.
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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 stored.
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Q.
Is the diagnosis code stored?
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Replace the CVT-ECU.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions .).
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