Code No. U1201: Vehicle Speed Signal Error




FUNCTION




TROUBLE JUDGMENT


Check Conditions
Judgement Criterion

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III diagnosis code



  • Confirm the diagnosis code is set from the Engine-ECU.

Q. Is the diagnosis code set?

Perform troubleshooting of the Engine-ECU (Refer to GROUP 13C - Troubleshooting - Inspection Chart for Diagnosis Code <4J1>, Refer to GROUP 13D - Troubleshooting - Inspection Chart for Diagnosis Code <4N1>).
Go to Step 2.

STEP 2. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?

Replace the AS&G-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).