P1247

DTC P1247: TC-SST Plausibility [TC-SST]

TECHNICAL DESCRIPTION

Checks for an abnormal signal of TCM.

DTC SET CONDITIONS

Check Condition

- Ignition switch is "ON" position.
Judgment Criterion

- A torque demand signal from TCM is not normal.

FAIL-SAFE AND BACKUP FUNCTION

- Torque requested by TC-SST-ECU is ignored.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)

- TC-SST system failed.
- ECM failed.

DIAGNOSIS

Required Special Tools:

- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A

STEP 1. Using scan tool MB991958, read the diagnostic trouble code (DTC).





CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"
(OFF) position before connecting or disconnecting scan tool MB991958.

(1)Connect scan tool MB991958 to the data link connector.
(2)Turn the ignition switch to the "ON" position.
(3)Read the TC-SST-DTC.
(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the TC-SST-DTC set?

YES Twin Clutch-Sportronic Shift Transmission (TC-SST).

NO Go to Step 2 .

STEP 2. Using scan tool MB991958, read the diagnostic trouble code
(DTC).

(1)Turn the ignition switch to the "ON" position.

(2)After the DTC has been deleted, read the DTC again.

(3)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is DTC P1247 set?

YES Replace the ECM (Refer to, Removal and Installation Removal and Replacement).
NO It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.