Code No. P1247: Trustful Check A/T

FUNCTION

Checks for an abnormal signal of A/T-ECU.

TROUBLE JUDGEMENT

Check Condition

Ignition switch is "ON" position.

Judgement Criterion

A torque demand signal from A/T-ECU is not normal.

FAIL-SAFE AND BACKUP FUNCTION

Torque requested by A/T-ECU is ignored.

PROBABLE CAUSES

Failed A/T system
Failed engine-ECU

DIAGNOSIS PROCEDURE

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

Reconfirmation of diagnosis code.

Q. Is diagnosis code stored?

	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

Confirm the diagnosis code is stored in the A/T-ECU.

Q. Is diagnosis code stored?

	Perform troubleshooting of the A/T system (Refer to GROUP 23C - Troubleshooting - Check Chart for Diagnosis Codes ).

	Replace the engine-ECU.