BMW 1999-2005 M3 Service Manual page 136

Engine-General
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Good grounds are critical to proper
DME operation. If a ground connection
has no visible faults but is still suspect,
measure the voltage drop across the
connection. A large voltage drop
indicates high resistance, indicating
that the connection is corroded, dirty or
damaged. Clean or repair the
connection and retest.
Note:
For instructions on conducting a voltage
drop test and other general electrical
troubleshooting information, see
Electrical System–General.
Below is a listing of the main grounds
for the fuel and ignition circuits of the
DME system.
Main ground (arrow) for engine
management system in left rear of
engine compartment on bulkhead
behind E-box.
Main grounds for ignition coils
(arrows).
Main chassis ground harness
connection (arrow) in left front of
600
2/25/2009 9:59 PM