BMW 5251 Service Manual page 350

Ignition
System
This repair group covers component troubleshooting and re-
placement information for the ignition system.
When diagnosing engine management problems, including
on-board diagnostics (OBD 1 1 ) fault code analysis, also refer
to these repair groups:
*
130 Fuel Injection
* ELE
Electrical Wiring Diagrams
OED On-Board Diagnostics
Special tools
System diagnosis and testing of the ignition system requires
special test equipment.
4
LED test light
(Tool No. Baum 1 1 15)
4
Automotive digital multimeter
4
Primary voltage test harness
(Tool No. BMW 12 7 020)
-
4
Secondary voltage test harness
(Tool No. BMW 12 7 030)