Body Control Unit - General Information: Troubleshooting
For specific DTC testing, see ON-BOARD DIAGNOSTICS - BOSCH M5.2.1 ENGINE MANAGEMENT - DISCOVERY & RANGE ROVER and ON-BOARD DIAGNOSTICS - DISCOVERY & RANGE ROVER .
For specific DTC testing, see ON-BOARD DIAGNOSTICS - BOSCH M5.2.1 ENGINE MANAGEMENT - DISCOVERY & RANGE ROVER and ON-BOARD DIAGNOSTICS - DISCOVERY & RANGE ROVER .