Test values, control moduleconnections
| Test values, control module connections |
| Scope |
The following section contains values and instructions for measuring signals/levels on the MOTRONIC control module.
| Some important points to remember: |
| • |
Readings must be taken with a
Breakout Box (BOB) connected
between the control module and the control module connector.
|
|
| • |
Several voltage levels must be regarded as guiding values.
Your common sense should tell you whether a reading is
correct or not.
|
|
| • |
If any test reading is obviously wrong, use the wiring
diagram to trace the leads, connectors or components which
you consider ought to be checked more thoroughly.
|
|
> = greater than ; < = less than ; » = approximately equal to; ∼ = alternating current
|
Pin
|
Colour
|
Component
Function
|
Input
Output
|
Test
condition
|
Test
reading
|
Across
X-
Y
|
|
1
|
YE
|
Ignition coil
|
Output
|
Ignition ON
|
Batt+
|
1 - 14
|
|
Idling
|
»
0.65 V
|
37 - 1
|
||||
|
2
|
BK
|
Power ground
|
Input
|
Idling
|
< 0, 1 V
|
2 - 14
|
|
3
|
WH
|
Fuel pump relay
|
Output
|
Ignition ON
|
Batt+
|
3 - 14
|
|
|
|
|
|
Starter motor cranking,
idling
|
O V
|
|
|
4
|
VT
|
IAC valve (OPEN)
|
Output
|
Idling, engine hot
|
»
2-5 V
»
2-5 ms
100
Hz
|
37 - 4
|
|
5
|
GN
|
Canister Purge
valve
|
Output
|
Ignition ON
|
Batt+
|
5 - 14
|
|
Idling, engine hot
|
0.3-0.5 V
15 Hz
|
37 - 5
|
||||
|
6
|
GN/RD
|
Engine rpm
|
Input
|
Idling
|
»
3 V
» 30 Hz |
37 - 6
|
|
2500 rpm
|
»
85 Hz
|
6 - 14
|
||||
|
7
|
GY/WH
|
Mass air flow sensor
|
Input
|
Idling
|
»
1 V
|
7 - 26
|
|
2500 rpm
|
»
1.5 V
|
|||||
|
Full throttle
|
»
3.2 V
|
|||||
|
8
|
YE
|
Position sensors,
camshaft |
Input
|
Ignition ON
engine turning over |
0/5 V
|
8 - 14
|
|
Idling
|
»
4.3 V
» 7.5 Hz |
|||||
|
9
|
PK/BK
|
Car speed
(Wheel speed, FR)
|
Input
|
Ignition ON,
FR wheel rotating
|
0/10 V
|
9 - 14
|
|
10
|
BK
|
Reference ground,
oxygen
sensor
|
Input
|
Idling
|
< 0.1 V
|
10 - 14
|
|
11
|
GY
|
Knock Detector
|
Input
|
3000 rpm
|
> 20 mV~
|
11 - 14
|
|
12
|
WH/BK
|
Position sensors, throttle
+
camshaft
|
Output
|
Ignition ON
|
5 V
|
12 - 14
|
|
13
|
|
Diagnostic L lead
|
Input
|
Ignition ON
|
ª 10 V
|
13 - 14
|
|
14
|
BK
|
Power ground
|
Input
|
Idling
|
< 0.1 V
|
14 - Batt-
|
|
15
|
Not used
|
|||||
|
16
|
GN
|
CYL 3 injector
|
Output
|
Idling, engine
hot
|
ª 0.3 V
ª 3 ms
ª 8
Hz
|
37 - 16
|
|
17
|
GY
|
CYL 1 injector
|
Output
|
Idling, engine
hot
|
ª 0.3 V
ª 3 ms
ª 8
Hz
|
37 - 17
|
|
18
|
PK/WH
|
Battery voltage
+30
(memory)
|
Input
|
Battery OK
|
Batt+
|
18 - 14
|
|
19
|
BK
|
Signal ground
|
Input
|
Idling
|
< 0.1 V
|
19 - 14
|
|
20
|
Not used
|
|||||
|
21
|
YE/GN
|
CHECK ENGINE
(MIL)
|
Output
|
Ignition ON,
MIL on
|
Batt+
|
37 - 21
|
|
Ignition ON,
MIL out
|
O V
|
|||||
|
22
|
WH
|
IAC valve (CLOSE)
|
Output
|
Idling, engine
hot
|
7-10 V
6-8 ms
100 Hz
|
37 - 22
|
|
23
|
OG
|
Secondary air
injection pump
relay
|
Output
|
Idling, engine cold
< 60s after
starting
|
Batt+
|
37 - 23
|
|
24
|
BK
|
Power ground
|
Input
|
Idling
|
< 0.1 V
|
24 - 14
|
|
25
|
Not used
|
|||||
|
26
|
BU/YE
|
Ground, mass air flow sensor
|
Output
|
Idling
|
< 0.1 V
|
26 - 14
|
|
27
|
YE/GY
|
Battery voltage +15
|
Input
|
Idling
|
Batt+
|
27 - 14
|
|
28
|
BU/BN
|
Signal, oxygen sensor
|
Input
|
Idling, engine
hot
|
0-1 V
|
28 - 10
|
|
29
|
|
Not used
|
||||
|
30
|
BN/WH
|
Sensor ground
|
Output
|
Idling
|
< 0.1 V
|
30 - 14
|
|
31
|
Not used
|
|||||
|
32
|
Not used
|
|||||
|
33
|
RD/WH
|
Relay, air conditioning
|
Output
|
Idling, A/C ON
|
Batt+
|
37 - 33
|
|
34
|
BN
|
Injector, CYL 2
|
Output
|
Idling, engine
hot
|
ª 0.3 V
ª 3 ms
ª 8
Hz
|
37 - 34
|
|
35
|
BU/BK
|
Injector, CYL 4
|
Output
|
Idling, engine
hot
|
ª 0.3 V
ª 3 ms
ª 8
Hz
|
37 - 35
|
|
36
|
BU/GY
|
Main relay
|
Output
|
Ignition OFF
|
Batt+
|
36 - 14
|
|
Ignition ON
|
O V
|
|||||
|
37
|
GN/RD
|
Supply voltage
|
Input
|
Ignition ON
|
Batt+
|
37 - 14
|
|
38
|
Not used
|
|||||
|
39
|
Not used
|
|||||
|
40
|
GN/RD
|
Programming for choice
of
gearbox
|
Input
|
Ignition ON
|
B+ (Automatic)
|
40 - 14
|
|
Ignition ON
|
O V (Manual)
|
|||||
|
41
|
GN/GY
|
Air conditioning ON/OFF
|
Input
|
Ignition ON
A/C ON
|
Batt+
|
41 - 14
|
|
42
|
Not used
|
|||||
|
43
|
Not used
|
|||||
|
44
|
GN/BK
|
Electrical load
|
Input
|
Radiator fan ON
|
Batt+
|
44 - 14
|
|
Radiator fan OFF
|
0
|
|||||
|
45
|
GN/WH
|
Coolant temperature sensor
|
Input
|
Ignition ON 90°C
|
»
0.9 V
|
45 - 30
|
|
46
|
Not used
|
|||||
|
47
|
BK/WH
|
DRIVE signal
|
Input
|
Ignition ON
R-D-3-1
|
Batt+
|
47 - 14
|
|
48
|
BU/RD
|
Crankshaft position sensor
|
Input
|
Starter motor cranking
|
2-5 V ∼
|
48 - 49
|
|
Idling
|
7-11 V ~
|
|||||
|
2500 rpm
|
»
20 V ~
|
|||||
|
49
|
GN/BN
|
Crankshaft position sensor
|
Input
|
Starter motor cranking
|
2-5 V ~
|
49 - 48
|
|
Idling
|
7-11 V ~
|
|||||
|
2500 rpm
|
»
20 V ~
|
|||||
|
50
|
Not used
|
|||||
|
51
|
OG/WH
|
Torque reduction
|
Input
|
Ignition ON
|
Batt+
|
51 - 14
|
|
Shifting
|
O V
|
|||||
|
52
|
GN/OG
|
Throttle position to TCM
|
Output
|
Idling
|
»
1.3 V
100 Hz
|
52 - 14
|
|
2500 rpm
|
»
2.2 V
100 Hz
|
|||||
|
Full throttle
|
»
12 V
100 Hz
|
|||||
|
53
|
BU/WH
|
Throttle position sensor
|
Input
|
Idling position
|
»
0.6 V
|
53 - 30
|
|
Full-throttle position
|
»
4.5 V
|
|||||
|
54
|
BU/GN
|
Coding (open circuit M94)
|
||||
|
55
|
GY/BK
|
Diagnostic lead
|
Input/Output
|
Ignition ON
ISAT contacted
|
»
11 V
|
55 - 14
|
This project is supported by memberships and donations. If you use this site, please consider Joining SCNA and/or making a donation.
Our Friends
