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SWS DIAGNOSIS TSB Revision SIMPLIFIED WIRING SYSTEM (SWS) 54B-31 SCAN TOOL MB991502 COMMUNICATION IS TECHNICAL DESCRIPTION (COMMENT) TROUBLESHOOTING HINTS • Malfunction of the ETACS-ECU • Damaged harness wires or connectors DIAGNOSIS Required Special Tools: • MB991223: Test Harness Set • MB991502: Scan Tool (MUT-II) STEP 1. Check the communication with other systems. Q: Can the scan tool communicate with no systems? YES : Refer to GROUP 13A, Diagnosis or GROUP 13B, Diagnosis. NO (can not communicate with SWS only : Go to Step 2. STEP 2. Check the ignition switch positions. Q: Can scan tool MB991502 communicate with the ETACS- ECU with the ignition switch at any position other than Inspection Procedure O-1 ( AC003089 AB CONNECTOR: C-23 AC003079 AB CONNECTOR CONNECTOR: C-66 AC003082AE C-82 JUNCTION BLOCK CONNECTORS: C-73, C-82 C-73 AC003080AC C-86 JUNCTION BLOCK CONNECTORS: C-84, C-86 C-84 |