After bridging teminals 5 & 6, turn ignition on. The engine light will flash once, short pause then 2 flashes. This means 12, 1st group of flashes represents 10's, second group of flashes represents units. It always starts with 12, 3 times. Each code is displayed 3 times followed by a longer pause before the next code. So after 12 flashes 3 times it will move on to the next code ( eg 4 flashes followed by 2 flashes= 42). After all the codes have been displayed it will flash 12 again. I hope you can understand my explanation. When you get the codes, reply and tell me what they are and I will tell you what they mean. If you only get code 12, that indicates there are no fault codes.