Inspection Procedure 6: Gears Cannot Be Changed With The Manual Mode

INSPECTION PROCEDURE 6: Gears cannot be changed with the manual mode.

CAUTION
Whenever the ECU is replaced, ensure that the CAN bus lines are normal.

COMMENTS ON TROUBLE SYMPTOM
The CAN bus lines, shift lever assembly, or mechatronic assembly may have a problem.

PROBABLE CAUSES
^ Malfunction of the CAN bus lines
^ Malfunction of the shift lever assembly
^ Malfunction of the mechatronic assembly

DIAGNOSTIC PROCEDURE

Required Special Tools:
^ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
^ MB991824: Vehicle Communication Interface (V.C.I.)
^ MB991827: M.U.T.-III USB Cable
^ MB991910: M.U.T.-III Main Harness A

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. After repairing the CAN bus line, go to Step 2.

STEP 2. Scan tool data list.
Shift lever item No. 1: Lever position (Data List Reference Table).
1) Confirm that "Manual" is displayed when the shift lever position is in the manual mode.
2) Confirm that "+" is displayed when the shift lever position is upshifted and held, and "-" is displayed when the shift lever position is downshifted and held.
Q: Is the check result normal?
YES: Go to Step 3.
NO: Replace the shift lever assembly.

STEP 3. Retest the system.
Q: Does a malfunction take place again?
YES: Replace the mechatronic assembly.
NO: Intermittent malfunction.