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Home >> Mazda >> 2020 >> CX-5 Signature >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Front Body Control Module (FBCM) >> DTC U0338-09: Error Light Switch Signal Received From Start Stop Unit >> Notes
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DTC U0338-09: Error Light Switch Signal Received From Start Stop Unit: Notes

DTC U0338:09 (FRONT BODY CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

Description Error light switch signal received from start stop unit
Detection condition
  • Front body control module (FBCM) receives the CAN error signals from the start stop unit 3 times continuously with the ignition switched ON (engine off or on).
Fail-safe function
  • If DTC U0338:09 is detected when the ignition is switched ON (engine off or on), the headlight LO and the TNS (parking lights) are illuminated.
  • If DTC U0338:09 is cleared, the headlight LO and the TNS (parking lights) are turned off, and the operation returns to normal.
  • Operate the windshield wiper at low speed only when the windshield wiper switch is at LO or HI.
Possible cause
  • DTCs are stored in the start stop unit.
  • Start stop unit malfunction
  • Front body control module (FBCM) malfunction
System wiring diagram Not applicable