DTC B1869: TCU Internal Error: Diagnosis
Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Check again if the DTC is set in the TCU.
CAUTION:
To 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) ."
- Erase the DTC.
- Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
- Check the DTC.
Q: Is the DTC set?
YES: Replace the TCU (Refer to TCU ).
NO: The trouble can be an intermittent malfunction (Refer to How to use Troubleshooting/inspection Service Points - HOW TO COPE WITH INTERMITTENT MALFUNCTION ).