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DTC U1197: Coding data unavailable
 
 
caution
  • If DTC U1197 is set, diagnose the CAN bus lines.
  • When replacing the ECU, always check that the communication circuit is normal.
 
 
TROUBLE JUDGMENT
This DTC will be set when the variant coding for the ETACS-ECU has not been implemented.
 
 
TROUBLESHOOTING HINTS
  • Variant coding not performed
  • The ETACS-ECU may be defective
  • The multivision display may be defective
  • The CAN bus line may be defective
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), diagnose CAN bus line.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting - CAN Bus Diagnostics Table ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), check whether the other system DTC is set.
Check if DTC is set in the ETACS-ECU.
Is the DTC set?
Diagnose the ETACS.
Go to Step 3.
 
STEP 3. ETACS-ECU coding data check.
Using scan tool (M.U.T.-IIISE), check if any abnormality is present to the coding data which are stored in the ETACS-ECU.
Is the check result normal?
Go to Step 4.
Replace the ETACS-ECU.
 
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Check again if the DTC is set in the multivision display.
(1) Erase the DTC.
(2) Turn the ignition switch to "ON" position.
(3) Check the DTC.
Is the DTC 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 ).