Vehicle does not decelerate or accelerate accordingly when the set/decel or resume/accel switch is pressed
Diagnostic procedure
  1. Check for diesel engine management system DTCs.
  2. Do the cruise control input test. Test the cruise control set/decel, resume/accel switch signal input.
  3. Do the cruise control combination switch test.
Also check for
  • Open circuit, loose or disconnected terminals: YEL/RED, GRY or LT GRN/BLK, YEL