Всяко может быть при плохой массе.
Посмотреть вложение 84120
D = 12 V power = The same as 1.8t coil pack No.1 (power from the firewall connectors)
C = Trigger Sequencer Signal. the 1 to 5 V signal from the ECU = the appropriate color code from the ECU equivalent to the 1.8t coil pack pin 3.
B = Trigger ground back to ECU, in this case Pin 2 on ECU connector 1, the one with a brown wire with a white stripe, equivalent to the 1.8t coil pack pin 2.
A = Common ground for the coils, equivalent to pin 4 in the 1.8t coil pack diagram. ( Ground to Valve Cover ).