Code No. P061F: Fail-safe Control System

FUNCTION

To judge whether fail-safe control can be performed, check that power supply to the throttle valve control motor 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.

Judgement Criterion

Power supply to the throttle valve control servo cannot be shut down (though power supply is stopped).

FAIL-SAFE AND BACKUP FUNCTION

Microcomputer is reset.

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 power system. Check code No. P0657: throttle valve control servo relay circuit malfunction (Refer to ).

	Replace the engine-ECU.