Code No.B1A28 ENG ECU authentication error
| caution |
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DIAGNOSIS FUNCTION
JUDGEMENT CRITERIA
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of ETACS-ECU
- Engine-ECU malfunction
- Chassis number registered in engine-ECU unmatched
DIAGNOSIS PROCEDURE
STEP 1. Check whether the diagnosis code is reset.
| (1)Erase the diagnosis code. |
| (2)Remove the ignition key from key cylinder and insert it again then turn the ignition
switch from the Lock (OFF) position to the ON position. |
| (3)On completion, check that the diagnosis code is not reset. |
Q.
Is the diagnosis code set?
STEP 2. M.U.T.-III CAN bus diagnostics
Q.
Is the check result normal?
STEP 3. M.U.T.-III other system diagnosis code
Q.
Is the diagnosis code set?
STEP 4. Diagnosis code check
Q.
Is diagnosis code No. B1761 or B2206 set?
STEP 5. Check whether the diagnosis code is reset.
| (1)Register the ignition key which is used when detect the diagnosis code. |
| (2)Remove the ignition key from the cylinder and then insert the ignition key again. |
| (3)After 2 or 3 seconds later from inserting the key, then turn the ignition ON. |
| (4)Check if the diagnosis code is set? |
Q.
Is the diagnosis code set?
STEP 6. Check of chassis number registered in the ETACS-ECU and matching check of vehicle’s chassis number.
| (1)On the M.U.T.-III system selection screen, select "MPI/GDI/Diesel." |
| (2)Select "Coding." |
| (3)Select "Chassis No. Information." |
| (4)Compare it with the chassis number of the vehicle. |
Q.
Do the chassis number registered in the ETACS-ECU and the vehicle’s chassis
number match?
STEP 7. Check whether the diagnosis code is reset.
| (1)Register the ignition key which is used when detect the diagnosis code. |
| (2)Remove the ignition key from the cylinder and then insert the ignition key again. |
| (3)After 2 or 3 seconds later from inserting the key, then turn the ignition ON. |
| (4)Check if the diagnosis code is set? |
Q.
Is the diagnosis code set?