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.