Code No. P1232: Fail-safe Control System




FUNCTION



  • To judge whether fail-safe control can be performed, check that power supply to the throttle valve control servo circuit can be stopped by turning the throttle valve control servo relay to OFF position momentarily.

TROUBLE JUDGMENT


Check Condition
  • Ignition switch is "ON" position.
Judgment Criterion
  • Power supply to the throttle valve control servo cannot be shut down (though power supply is stopped).

PROBABLE CAUSES



  • Failed throttle valve control servo relay circuit
  • Failed engine-ECU

DIAGNOSIS PROCEDURE


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



  • Reconfirmation of diagnosis code.

Q. Is diagnosis code set?

Go to Step 2 .
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

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


Q. Is diagnosis code of P0657 set?

Check throttle valve control servo circuit (Refer to Code No. P0657 ).
Replace the engine-ECU.