1)
| If all eight items listed are OK, the numerical values indicated above are added together and a value of 255 appears in the function status register (measured value block 7). If, for example, GALA pulses were not detected, the value for GALA pulses (32) is subtracted from the value of 255 and the value displayed in the function status register is then 223 (255 - 32 = 223). Proceed as follows if 244 for example is displayed in function status register: 255 - 244 = 11; 11 is made up of 8 (signal from reversing light switch not detected), 2 (current input of GPS aerial not OK) and 1 (CAN communication with navigation unit not OK). |