Inspection Procedure 10: TCL/ASC System Does Not Operate

INSPECTION PROCEDURE 10: TCL/ASC System dose not Operate.

COMMENT
The fail-safe function is probably canceling TCL/ASC system. In this case, scan tool MB991958 can be used to Retest each system by checking the diagnostic trouble codes.

TROUBLESHOOTING HINTS (The most likely causes for this case:)
^ Malfunction of the CAN bus line.
^ Malfunction of the TCL/ASC-ECU.

DIAGNOSIS

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. Hydraulic unit check
Q: Is the hydraulic unit normal?
YES: Go to Step 2.
NO: Connect the brake pipes correctly, repair the external brake lines, or replace the hydraulic unit.

STEP 2. Verify that the condition described by the customer exists.
Q: Can any faults be found with the brake operation?
YES: Check the brake system related components except the ASC system.
NO: The procedure is complete.