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DTC B1766: Already learned by other vehicle
 
 
cautionWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TROUBLE JUDGMENT
If the key registered for another vehicle is used to start the engine, the ETACS-ECU stores DTC No.B1766.
 
 
 
TROUBLESHOOTING HINTS
  • Ignition key (key ID) is another vehicle's key
  • Ignition key (key ID) is new key
  • The ETACS-ECU may be defective
 
 
 
 
DIAGNOSIS
STEP 1. All ignition keys registration
Check that the all ignition keys are registered.
Is the check result normal?
Go to Step 2.
Register the all ignition keys. Refer to .
 
STEP 2. Using scan tool (M.U.T.-III), diagnose the CAN bus line
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III) ."
(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 3.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ). Repair the CAN bus line.
 
STEP 3. Check with another key that has already been registered.
(1) Turn the ignition switch to the ON position using another key that has already been registered.
(2) Check that DTC No.B1766 is not set.
Is the DTC stored?
Replace the all ignition keys or by the service key set, and register the ID codes (Refer to ). After registering the ID codes, go to Step 4.
Replace the ignition key that the DTC is stored, and register the ID codes again (Refer to ). After registering the ID codes, go to Step 4.
 
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is stored.
(1) Turn the ignition switch to the "LOCK" (OFF) position once, and then turn it to the ON position again.
(2) Check that DTC No.B1766 is not set.
Is the DTC stored?
Replace the ETACS-ECU.
The procedure is complete.