Code No. 23 Engine-A/T-ECU and its related components


DIAGNOSIS CODE SET CONDITIONS


This diagnosis code is set when there is an failure in the engine-A/T-ECU and its related components.

PROBABLE CAUSE



DIAGNOSIS

STEP 1. Check the MPI system diagnosis code.

Q. Is any diagnosis code set?
Repair the MPI control system. (Refer to GROUP 13A, Troubleshooting - Inspection chart for diagnosis code Trouble Code Chart ). Then go to Step 4.
Go to Step 2.

STEP 2. Check the A/T system diagnosis code.

Q. Is any diagnosis code set?
Repair the A/T system (Refer to GROUP 23A, Troubleshooting <A/T> - Check chart for diagnosis codes ). Then go to Step 4.
Go to Step 3.

STEP 3. Check the M.U.T.-III diagnosis code No. 23.

Q. Is the M.U.T.-III diagnosis code No. 23 output?
Replace the engine-A/T-ECU (Refer to GROUP 13A, Engine-ECU and Engine-A/T-ECU). Then go to Step 4.
This malfunction is intermittent. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).

STEP 4. Check the M.U.T.-III diagnosis code No. 23.

Q. Is the M.U.T.-III diagnosis code No. 23 output?
Return to Step 1 .
This procedure is complete.