Anti-Lock Brake System & ASR - BOSCH 2S Micro: Diagnosis: Notes

NOTE: When a Diagnostic Trouble Code (DTC) is set, EBTCM will turn valve solenoid relay off. This provides a ground path for SERVICE ABS light and will set DTC 63. This is normal and should not be considered a system problem. See DTC 63 in DIAGNOSTIC CHARTS.

Electronic Brake And Traction Control Module (EBTCM) contains a self-diagnostic capability to detect system failures. When a DTC is set, EBTCM may disable ABS and/or ASR portion of system and illuminate SERVICE ABS and/or SERVICE ASR lights for duration of ignition cycle. DTCs stored by EBTCM can be displayed using Central Control Module (CCM) on-board diagnostics or Tech 1 scan tester with appropriate cartridge.

Start ABS/ASR system diagnosis with PRE-DIAGNOSTIC INSPECTION. See PRE-DIAGNOSTIC INSPECTION. If failures are found during pre-diagnostic inspection, perform necessary repairs and perform ABS/ASR FUNCTIONAL CHECK chart. If no failures were found during pre-diagnostic inspection, perform ABS/ASR FUNCTIONAL CHECK chart under DIAGNOSTIC CHARTS. From ABS/ASR FUNCTIONAL CHECK chart, you will be directed to enter diagnostics and retrieve DTCs, perform symptom diagnosis, perform brake system warning light diagnosis, or ABS/ASR functional check chart will indicate ABS/ASR system is functioning properly.