BMW 1992 525i Electrical Troubleshooting Manual page 142

IB!Stl
DIGITAL ENGINE ELECTRONICS (DME 1.2, 6-CYLINDER 538)
_.
_.
~
Pin
'1\'pe Description/Function
Connection
~pe of Signal Tester Display Measurement Notes
42 Not used
43
E Idle CO potentiometer
Air mass meter
0 ... 5V VoHage value
44
E Intake air temperature Intake air temperature sensor 0 ... 5V
oc
Temperature dependent
45 E Coolant temperature
Coolant temperature sensor
0 ... 5V
oc
Temperature dependent
46 Not used
47 E Inductive pulse generator
Pulse generator, engine A/C voltage Engine speed Between Pins 47 anc:l48
(connection A) speed/crankshaft position {can only be measured
with crankshaft rotation)
48 E
Inductive pulse generator Pulse generator, engine A/Cvoltage Engine speed Status monHoring at
(connection B) speed/crankshaft position or above starting rpm
49
Not used
.....
""
50
Not used
.....
0
51 Not used
~
I
52
E
Idle signal Throttle switch Ground ON See status monitoring
a.
on set Idle speed
53
E
Full load signal VL Throttle switch Ground ON At full load (kick-down)
54
E
Coding signal Fuel coding connector Ground
55 EIA TxD diagnostic data line Diagnostic socket Ground
When cover of diagnostic
connector closed