The replacement of the BMW X5 E53 ignition coil must be carried out in the following order, read the information from the fault memory, turn off the ignition and disconnect the battery. Remove the plugs from the protective casing of the ignition coils, unscrew the bolts and remove the protective casing of the ignition coils.
Unlock the loop and disconnect it from the ignition coil (1, fig. 3.161) and remove the coil upwards.
Before installation, it is necessary to check the ignition coil for the form of a multi-spark discharge signal using a tool «12.7.050» and DIS tester. The ignition waveform is shown in fig. 3.162.
Depending on engine temperature (20-100°C), and shaft speed (2000 min-1), before the normal ignition voltage, several (1—5) initial voltage pulses, the decisive voltage pulse is the first one. Additional breakdown voltages do not play any role.
The installation of the ignition coil should be carried out in the reverse order, while it is necessary to check the integrity and position of the rubber seal of the ignition coil. Upon completion of the replacement of the ignition coils, it is necessary to count the information about the malfunctions from the memory of the memory of the ECU-KSUD system «DME». Eliminate malfunctions and erase information about malfunctions from the memory of the memory.