DIAGNOSIS <SHIFT LEVER>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-381
STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the CAN bus lines. (Refer to GROUP 54C −
Troubleshooting
P.54C-15
.) After repairing the CAN
bus line, go to Step 2.
STEP 2. Scan tool actuator test
Item No.2: Back-up light (Refer to Special Function (Actuator
Test Reference Table
P.22C-393
.)
Q: Is the check result normal?
YES : Intermittent malfunction. (Refer to GROUP 00 − How
to Cope with Intermittent Malfunction
P.00-15
.)
NO : Go to Step 3.
STEP 3. Scan tool diagnostic trouble code
Check the ETACS diagnostic trouble code. (Refer to GROUP
54A − Troubleshooting
P.54A-646
.)
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 4.
STEP 4. Bulb check
Check if the bulb of the back-up light which does not illuminate
is normal.
Q: Is the check result normal?
YES : Go to Step 5.
NO : Replace the bulb which does not illuminate.
STEP 5. Measure the resistance at F-08 back-up light (RH)
connector and F-22 back-up light (LH) connector.
Disconnect the connector of the light which does not illuminate,
and measure the resistance between the connector terminal
No. 2 and ground at the wiring harness side.
OK: Continuity exists. (2 Ω or less)
Q: Is the check result normal?
YES : Go to Step 8.
NO : Go to Step 6.
STEP 6. Inspection of the back-up light (RH) connector,
back-up light (LH) connector, and intermediate connector:
F-08, F-22, F-27
Check for the contact with the connector terminals of the light
which does not illuminate.
Q: Is the check result normal?
YES : Go to Step 7.
NO : Repair the defective connector.