BMW 1992 525i Electrical Troubleshooting Manual page 106

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DIGITAL ENGINE ELECTRONICS (DME 1.3, 6-CYLINDER M30 WITH EML)
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Pin Type
Description/Function
Connection Type of Signal
Tester Display
Measurement Notes
14 M Ground
Ground point Ground
injection valves
15 A
Indicator "Check engine"
Instrument cluster Ground
Comes on if emission
related error code
is stored, and comes on
during starting
16 A Injection valves cyl. (1 + 3 + 5)
Injection valve Pulsed ground
Injection time ti Ground
=
> injector valves
open, see component
activation
17 A
Injection valves cyl. (2 + 4 + 6) Injection valve Pulsed ground Injection time ti
Ground
=
> injector valves
open, see component
activation
.....
18
E Hot at all times Terminal30 > 10V
1\)
.....
Ground for electronics and Ground point Ground
0
19 M
.
.....
sensor shields I
C"
20
Not used
21 Not used
22
Not used
23
Not used
24 M Ground, remaining output stages
Ground point Ground
{except for ignition and injection
valves)
25 Not used
26 M Ground, air flow meter
Air flow meter Ground
27 E Ignition terminal 15
Ignition switch > 10V
28 E Oxygen sensor signal
Oxygen sensor Pulsating voltage
Voltage value
Can only be measured with
up to approx. 1 V
the engine running at .....
operating temperature
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