Code No. P1240: Trustful Check Ignition Angle
FUNCTION
Checks for an abnormal ignition timing retard angle demand signal from the ASC system.
TROUBLE JUDGEMENT
Check Condition
Ignition switch is "ON" position.
Judgement Criterion
Ignition timing retard angle demand signal is abnormal.
FAIL-SAFE AND BACKUP FUNCTION
Ignition retard is not carried out.
PROBABLE CAUSES
Failed ASC system
Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code.
Reconfirmation of diagnosis code.
Q. Is diagnosis code related to CAN communication set?
Inspection chart for diagnosis code. (Refer to
).
Go to Step 2.
STEP 2. M.U.T.-III other system diagnosis code.
Confirm whether the diagnosis code is set in the ASC-ECU.
Q. Is diagnosis code set?
Perform troubleshooting of the ASC system (Refer to GROUP 35C - Troubleshooting, Diagnosis Code Chart
).
Replace the engine-ECU.