5.2.1.28.5. Compensation by the coupling force control system shall be indicated by means of the yellow warning signal specified in paragraph 5.2.1.29.1.2. if this compensation exceeds 150 kPa away from the nominal demand value defined in paragraph 2.28.3. up to a limit, in pm, of 650 kPa (or the equivalent digital demand). Above the level of 650 kPa the warning shall be given if the compensation causes the operating point to lie outside the laden compatibility band as specified in Annex 10 for the motor vehicle. a0c0