Code No. U1199:
Chassis No. not programmed
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- If diagnosis code No. U1199 is
set, be sure to diagnose the CAN bus line.
- Whenever the ECU is replaced, ensure that the communication circuit is normal.
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DIAGNOSTIC FUNCTION
Diagnosis code No. U1199 will be set when the VIN has not been written to the headlamp
automatic levelling-ECU.
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of engine-ECU
- Malfunction of headlamp automatic levelling-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting 
).
STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code is set in the engine-ECU.
Q.
Is the diagnosis code set?
Troubleshoot the engine (Refer to GROUP 13B - Diagnosis Code Chart <6B3> or
GROUP 13C - Diagnosis Code Chart <4N1>).
Go to Step 3.
STEP 3. Diagnosis code recheck
Check again if the diagnosis code is set in the headlamp automatic levelling-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 set.
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Q.
Is the diagnosis code set?
Replace the headlamp automatic levelling-ECU (Refer to ).
The procedure is complete.