TROUBLE-SHOOTING

SYSTEMDESCRIPTION SIMTEC56.5

System Description

General
Simtec56.5 is a fuel injection and ignition system that is used in Opel.
andVauxhalcars.Thesystemusescertainsensorswhichoperateinan
unusual way. The first is the camshaft sensor, which is described on page
5.Thesecondisthelambdasensorwhich,unlikethelambdasensorin
other systems, has a signal that alternates between 0–5V.
Note:
It is important that the connection of the equipment is done according to
Users Guide (page 6).

Car Models
The following car models are equipped with Simtec 56.5:
Manufacturer Engine size Engine Model
Calibra 2.0 X20XEV 95–
Astra-F 18. X18XE 95
Astra-F 2.0 X20XEV 95–
Vectra-B 18. X18XE 95–
Vectra-B 2.0 X20XEV 95–
Omega 18. X18XE 95
Omega 2.0 X20XEV 95–

Please check the workshop manual to verify if the actual car is equipped.
with a system described in this manual.

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SIMTEC56.5 INTERFACE- SIGNALLOCATIONS

Interface - Signal Locations

1. Diagnosis 45. Control signal to EGR valve
Ground from chassis 46. Control signal to idle speed correction valve
3. Load signal to automatic gear* 47. Control signal to tank ventilation valve
4. Status signal from automatic transmission* 48. Control signal to lambda sensor pre-heater
5. Signal from speedometer Control signal to main relay
6. Gear shift time signal from automatic 50. Control signal to secondary air injection
transmission 51. Not connected
7. Ground from chassis 52. Engine control lamp
8. Signal from air temperature sensor 53. Control signal to adjustable manifold valve**
Status signal from air conditioning system* 54. Control signal to fuel pump relay
10. Signal from lambda sensor 55. Constant power supply from battery
Ground from chassis
12. Signal from knock sensor * If AC/Automatic
13. Signal from camshaft sensor ** Not OMEGA-B Wiring
14. Ground to air mass meter
15. Ground from chassis
16. Power supply to crankshaft sensor
Power from ignition switch (terminal 15)
18. Power supply to throttle potentiometer 19
19. Ground from chassis 55 37
20. Engine speed signal to revolution counter 18
54 36
21. Fuel consumption signal to board computer 17
22. Diagnosis 53 35
16
23. Signal from air conditioning compressor 52 34
24. Signal from crankshaft sensor 15
51 33
25. Not connected 14
26. Signal from throttle potentiometer 50 32
27. Signal from coolant temperature sensor 13
49 31
28. Not connected 12
29. Ground from chassis 48 30
11
30. Signal from knock sensor 47 29
31. Oscillation signal to the camshaft sensor 10
46 28
32. Ground to camshaft sensor 9
33. Signal from air mass meter 45 27
34. Control signal to the air conditioning compressor 8
44 26
relay 7
35. Power supply from main relay 43 25
6
36. Power supply to lambda sensor 42 24
37. Not connected 5
41 23
38. Control signal to ignition amplifier, cylinder 2 & 3 4
Control signal to ignition amplifier, cylinder 1 & 4 40 22
40. Control signal to injection valve, cylinder 4 3
39 21
41. Control signal to injection valve, cylinder 2 2
42. Control signal to injection valve, cylinder 1 38 20
1
43. Control signal to injection valve, cylinder 3
Power supply from main relay

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WIRING DIAGRAM SIMTEC56.5

Wiring Diagram
This wiring diagram is an example. Check in the relevant workshop manual.
for the diagram of the car you are working with.

Control unit
In My Opinion ATS
Ignition Battery
amplifier - +
55 17 35 44
3
+ + + +
1
39
33
2
14 38

3241 15
Ignition switch
Air mass meter 30

4
C 6
Main relay
86
49 85

A 8 2
48 87 30

Lambda sensor
B
D
36
10
+5
54
6 85
86
4 Fuel pump
29
8 87 30
2 relay
40
3 41

Crankshaft sensor 2
1
24
16
42
Fuel pump
43

3
Injection valves
Camshaft sensor 1
32
13
85
86
Secondary
2 30 87
31
87A air pump relay
1
2
12
M
Secondary
Knock sensor 30
air pump
Throttle 2 18+5
50
Secondary
potentiometer
3
1
26 air valve
53
Variable intake
Coolant 27 manifold
temperature sensor
45
EGR valve
Air temperature sensor 8

47
Tank ventilation
P 6 valve
Automatic gearbox
N
R
3
1
2
3
4
46 Idle speed
correction valve
21
23
Dashboard
AC 9
20
52
34

Speedometer 5
1
22
Diagnosis
2 7 11 15 19

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