ABS/TCS - TCS Lamp ON/Code 5DF3 Set

SI M 34 01 09
Brakes

January 2009
Technical Service

SUBJECT
Traction Control Warning Illuminated; Fault Code 5DF3 Stored

MODEL
Cooper with manual transmission (R55, R56)
Cooper S with manual transmission (R55, R56)
Cooper S JCW (R55, R56)

SITUATION

The customer may report that the traction control warning illuminated while driving. Depending on the vehicle's equipment level, fault code 5DF3 "Interface: DME/DDE signal fault" may be stored in either the Automatic Stability Control Module (ASC) or the Dynamic Stability Control Module (DSC).

INFORMATION

The fault code 5DF3 is set in the ASC/DSC module whenever an implausible signal is received from the Engine Control Module (DME). Therefore, it is important to check the DME fault memory when diagnosing the ASC/DSC fault code 5DF3. If the DME fault memory contains fault code 2FC1 "Clutch switch signal", then the clutch switch input to the DME should be checked. If the clutch switch is not functioning properly, continue diagnosing the clutch switch electrical circuit. If the clutch switch is operating properly, then the most likely cause of the fault is driver error. If the driver rests his or her foot on the clutch pedal while accelerating, the fault will be stored. If operator error is suspected, please inform the customer accordingly.

WARRANTY INFORMATION

For information only