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Home >> Saab >> 2010 >> 9-5 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Bus And Diagnostics Communication >> Fault diagnosis, fault codes >> DTC U0074: Control Module Communication Bus B Off >> Circuit/System Verification

Circuit/System Verification

  1. Verify there are no other U code DTCs set.
  2. If other U code DTCs are set, diagnose them first. Refer to CONTROL MODULE U CODE LIST .
  3. Refer to DATA LINK REFERENCES  to determine if the control module setting DTC U0074 is on the mid speed or chassis high speed serial data circuits.
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