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DTC U1197: Coding data unavailable
 
 
 
 
Diagnostic function
TCM checks that the coding information is normal.
 
 
JUDGMENT CRITERIA
When the TCM cannot receive "programmed" signal within three seconds after the TCM is activated.
 
 
PROBABLE CAUSES
  • Malfunction of CAN bus line
  • Variant coding for ETACS-ECU has not been implemented.
  • Malfunction of ETACS-ECU
  • Malfunction of TCM
 
 
DIAGNOSIS
STEP 1. M.U.T.-III CAN bus diagnostics
Use the scan tool to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - Diagnosis, CAN Bus Diagnostics Table ), and then go to Step 2.
 
STEP 2. Symptom recheck after erasing diagnostic trouble code
(1) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(2) Check if the diagnostic trouble code is set.
Is the diagnostic trouble code set?
Go to Step 3.
The inspection is complete.
 
STEP 3. M.U.T.-III diagnostic trouble code
Check if the ETACS-related diagnostic trouble code is set.
Is the ETACS-related diagnostic trouble code set?
Carry out the appropriate troubleshooting.
Go to Step 4.
 
STEP 4. ETACS-ECU coding data check
Use scan tool to check if coding data stored in ETACS-ECU is normal.
Is the check result normal?
Go to Step 5.
Replace the ETACS-ECU.
 
STEP 5. Symptom recheck after erasing diagnostic trouble code
(1) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(2) Check if the diagnostic trouble code is set.
Is the diagnostic trouble code set?
Replace TCM.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions ).