Inspection Procedure 1: Scan Tool Cannot Communicate Only With ABS-ECU

Inspection Procedure 1: Scan Tool cannot Communicate only with ABS-ECU.

TECHNICAL DESCRIPTION (COMMENT)
When scan tool cannot communicate with the ABS system, the CAN bus line, ABS-ECU power supply circuit system, or ABS-ECU may be faulty.

TROUBLESHOOTING HINTS (The most likely causes for this case:)
^ Damaged wiring harness and connectors
^ ABS-ECU malfunction
^ Wrong routing of (M.U.T-III harness
^ Abnormality in battery or generator
^ Abnormality in power supply voltage to ABS-ECU
^ ECU malfunction of other system

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. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Check and repair the power supply circuit system.
NO: Repair the CAN bus lines.