BMW 1992 525i Electrical Troubleshooting Manual page 155

I
8
E,WI
DIGITAL ENGINE ELECTRONICS (DME M3.1, 6-CYLINDER MSO)
_,
_,
iS
Pin
Type Description/Function
Connection 'J\'pe
ot
Signal
Tester Display
Measurement Notes
10
Not used
11 A
Throttle valve position
EGS control unit Pulsewidth
Voltage value Depends on throttle valve
modulated posHion, oscilloscope
12 E
Throttle valve potentiometer
Throttle valve potentiometer 0.4-4.2V Voltage value Depends on throttle valve
posHion
13 A
Preheating Air mass meter
Voltage Increase Signal stops 4 sec after
tor approx. 0.5 engine stop
sec
14 M
Ground, air mass meter Air mass meter
Ground
15
Not used
16 E
Cylinder reference signal
Cylinder reference sensor NCvoltage Oscilloscope One signal per camshaft
.....
(ignition) (connection B) revolution
1\)
....
17 A
ti measuring signal (KVA signal,
Instrument cluster Square wave sig- Multimeter function Oscilloscope
0
fuel consumption signal} nal Pulse duration
:.._.
I
C"
18 Not used
19
Not used
20
Not used
21
Not used
22
Not used
25 A
Ignition terminal 1 Ignition coil 2 Primary signal Oscilloscope Engine test, test step 05
25 A
Ignition termtnal1
Ignition coil 3
Primary signal Oscilloscope Engine test, test step 05
25
A Ignition terminal1
Ignition coil 1
Primary signal Oscilloscope Engine test, test step 05
26
E Steady voltage, terminal30
B
+
terminal point
> 10V Diagnosis not possible
If
not fitted
....
cc
cc
N
(