[17] ENGINE AND EMISSION CONTROL - - AUTO-CRUISE CONTROL <4G69-VEHICLES WITH AUTO-CRUISE CONTROL SYSTEM> - DIAGNOSTIC TROUBLE CODE PROCEDURES - Code No. 23 Engine-A/T-ECU and its related components | PRINT PAGE / INDEX / PRIOR / NEXT

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 CAUSES Malfunction of the MPI system. Malfunction of the A/T system. Malfunction of the engine-A/T-ECU.
DIAGNOSIS PROCEDURE
STEP 1. Check the MPI system diagnosis code. Q: Is any diagnosis code set? YES: Repair the MPI control system (Refer to GROUP 13C, Troubleshooting - Inspection chart for diagnosis code Trouble Code Chart ). Then go to Step 4 . NO: Go to Step 2.
STEP 2. Check the A/T system diagnosis code. Q: Is any diagnosis code set? YES: Repair the A/T system (Refer to GROUP 23A, Troubleshooting <A/T> - Check chart for diagnosis codes ). Then go to Step 4. NO: Go to Step 3.
STEP 3. Check the MUT-II/III diagnosis code No. 23. Q: Is the MUT-II/III diagnosis code No. 23 set? YES: Replace the engine-A/T-ECU (Refer to GROUP 13C, Engine-A/T-ECU ). Then go to Step 4. NO: This malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).
STEP 4. Check the MUT-II/III diagnosis code No. 23. Q: Is the MUT-II/III diagnosis code No. 23 set? YES: Return to Step 1. NO: This procedure is complete.

[17] ENGINE AND EMISSION CONTROL - - AUTO-CRUISE CONTROL <4G69-VEHICLES WITH AUTO-CRUISE CONTROL SYSTEM> - DIAGNOSTIC TROUBLE CODE PROCEDURES - Code No. 23 Engine-A/T-ECU and its related components | PRINT PAGE / INDEX / PRIOR / NEXT

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