TROUBLE-SHOOTING SIMTEC 56.0/56.1
SYSTEM DESCRIPTION
System Description General
Simtec 56.0 and Simtec 56.1 are fuel injection and ignition systems that are used only in Opel and Vauxhall cars. The systems use a number of sensors which operate in an unusual way. Two of these are the crankshaft sensor and the camshaft sensor, which are described below. The third is the lambda sensor, which, unlike the lambda sensor in other systems, has a signal that alternates between 0 and 5 V. Summary – Car Models
The following car models are equipped with Simtec 56.0/56.1: Manufacturer
Astra Astra Calibra Omega Vectra/Cavalier
Engine size
1.8 2.0 2.0 2.0 2.0
Engine
C18XE/C18XEL X20XEV X20XEV X20XEV X20XEV
Please check the workshop manual to verify if the actual car is equipped with a system described in this manual. Sensors, signals and switches
• • • • •
Throttle potentiometer – measures the throttle’s angle. Coolant temperature sensor. Air temperature sensor – measures the temperature of the air ingested. Lambda sensor – measures the oxygen content of the exhaust gases. Crankshaft sensor – measures the rotation speed and indicates the top dead center. • Camshaft sensor – measures the camshafts rotation speed and it's position. • Air-mass meter – measures the air volume ingested. • Tachometer/Speedometer. A 01090253-1
3
TROUBLE-SHOOTING SIMTEC 56.0/56.1
INTERFACE - SIGNAL LOCATIONS
Interface - Signal Locations 1,8 litre 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46.
62
Signal from knock sensor Ground to crankshaft sensor/camshaft sensor Oscillation signal to the crankshaft sensor Oscillation signal to the camshaft sensor Signal from coolant temperature sensor Signal from air temperature sensor Power supply to lambda sensor Ground to air mass mater Ground from chassis Gearbox engagement signal* Load signal from automatic gear* Signal from air conditioning compressor* Diagnosis Fuel consumption signal to boardcomputer Control signal to fuel pump relay Control signal to main relay Control signal to tank ventilation valve Constant power supply from battery Ground from chassis Signal from knock sensor Signal from crankshaft sensor Signal from camshaft sensor Not connected Ground from chassis Signal from lambda sensor Signal from throttle potentiometer Signal from air mass meter Ground from chassis Signal from speedometer Gear position information from automatic gear* Status signal from air conditioning system* Engine speed signal to revolution counter Not connected Power supply to throttle potentiometer Engine control lamp Control signal to lambda sensor pre-heater Power supply from ain relay Control signal to ignition amplifier, cylinder 2 & 3 Not connected Control signal to ignition amplifier, cylinder 1 & 4 Ground from chassis Not connected Not connected Not connected Not connected Power supply from main relay
47. 48. 49. 50. 51. 52. 53.
Power from ignition switch (Terminal 15) Control signal to injeciton valve, cylinder 4 Control signal to injeciton valve, cylinder 2 Control signal to injeciton valve, cylinder 1 Control signal to injeciton valve, cylinder 3 Control signal to idle speed correction valve Control signal to the air conditioning compressor relay* 54. Not connected 55. Diagnosis
Wiring
55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
A 01090253-1
TROUBLE-SHOOTING SIMTEC 56.0/56.1
WIRING DIAGRAM
Wiring Diagram 1,8 litre This wiring diagram is an example. Check in the relevant workshop manual for the diagram of the car you are working with. Control unit IM O
ATS
18
47
37
46
+
+
+
+
Ignition amplifier
+
1 2
38
15
3241
Ignition switch
30
Air mass meter C
16
A
36
B D
Lambda sensor
Battery
3 40
27 8
-
7 25
+5 15
1
85
8
87
9
8 5B
4
8 7B
86
3
30
2
Main relay /Fuel pump relay
48 3 1 2
3 1 2
Camshaft sensor
Throttle potentiometer
2 3 1
1 20
34 26
+5
Injection valves
5
17
P N R 1 2 3
11 52 30
31
29 9
A 01090253-1
B
Tank ventilation valve
1
Idle speed correction valve
10
53
Speedometer
A
6
12
AC
Fuel pump
51
19
Coolant temp. sensor Air temp. sensor Automatic gear box
50
22 4 1 2
Knock sensor
49
2 21 3
SIM TEC
Crankshaft sensor
24
28
2
14 32 35
Dashboard
13 55
Diagnosis
41
63
TROUBLE-SHOOTING SIMTEC 56.0/56.1
INTERFACE - SIGNAL LOCATIONS
Interface - Signal Locations 2,0 litre – Astra-F and Omega-B 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45.
64
Signal from knock sensor Ground to crankshaft sensor/camshaft sensor Oscillation signal to the crankshaft sensor Oscillation signal to the camshaft sensor Signal from coolant temperature sensor Signal from air temperature sensor Power supply to lambda sensor Ground to air mass mater Ground from chassis Gearbox engagement signal* Load signal from automatic gear* Signal from air conditioning compressor* Diagnosis Fuel consumption signal to boardcomputer Control signal to fuel pump relay Control signal to main relay Control signal to tank ventilation valve Constant power supply from battery Ground from chassis Signal from knock sensor Signal from crankshaft sensor Signal from camshaft sensor Not connected Ground from chassis Signal from lambda sensor Signal from throttle potentiometer Signal from air mass meter Ground from chassis Signal from speedometer Gear position information from automatic gear* Status signal from air conditioning system* Engine speed signal to revolution counter Temperature switch, relay box (Omega-B only) Power supply to throttle potentiometer Engine control lamp Control signal to lambda sensor pre-heater Power supply from ain relay Control signal to ignition amplifier, cylinder 2 & 3 Not connected Control signal to ignition amplifier, cylinder 1 & 4 Ground from chassis Control signal to EGR-valve Not connected Control signal to secondary air injection Not connected
46. 47. 48. 49. 50. 51. 52. 53.
Power supply from main relay Power from ignition switch (Terminal 15) Control signal to injeciton valve, cylinder 4 Control signal to injeciton valve, cylinder 2 Control signal to injeciton valve, cylinder 1 Control signal to injeciton valve, cylinder 3 Control signal to idle speed correction valve Control signal to the air conditioning compressor relay* 54. Not connected 55. Diagnosis
Wiring
55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
A 01090253-1
TROUBLE-SHOOTING SIMTEC 56.0/56.1
WIRING DIAGRAM
Wiring Diagram 2,0 litre – Astra-F and Omega-B
This wiring diagram is an example. Check in the relevant workshop manual for the diagram of the car you are working with. Control unit IM O
ATS
18
47
37
46
+
+
+
+
Ignition amplifier
+
2
38
15
3241
Air mass meter
Ignition switch
30
16
C A
6
85
8
87
6
85
8
87
86
4
30
2
86
4
30
2
Main relay
36
B D
Lambda sensor
Battery
1
40
27 8
-
3
7 25
+5 15
Injection valves
Fuel pump relay
48 3 1 2
3 1 2
Camshaft sensor
Throttle potentiometer Coolant temp. sensor Air temp. sensor Automatic gear box
2 3 1
50
1 20
34 26
+5
6 2 5
86
4
87
8
Secondary air pump relay
8 7A
Secondary air valve
44
19 5
17
A B
Tank ventilation valve
1
EGR-valve
6 42
P N R 1 2 3
2
10 11 52 30
31
29 9
A 01090253-1
30
Secondary air pump
53
Speedometer
85
M
12
AC
Fuel pump
51
22 4 1 2
Knock sensor
49
2 21 3
SIM TEC
Crankshaft sensor
24
28
2 1
Idle speed correction valve
14 32 35
Dashboard
13 55
Diagnosis
41
65
TROUBLE-SHOOTING SIMTEC 56.0/56.1
INTERFACE - SIGNAL LOCATIONS
Interface - Signal Locations 2,0 litre – Vectra/Cavalier and Calibra 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45.
66
Signal from knock sensor Ground to crankshaft sensor/camshaft sensor Oscillation signal to the crankshaft sensor Oscillation signal to the camshaft sensor Signal from coolant temperature sensor Signal from air temperature sensor Power supply to lambda sensor Ground to air mass mater Ground from chassis Gearbox engagement signal* Load signal from automatic gear* Signal from air conditioning compressor* Diagnosis Fuel consumption signal to boardcomputer Control signal to fuel pump relay Control signal to main relay Control signal to tank ventilation valve Constant power supply from battery Ground from chassis Signal from knock sensor Signal from crankshaft sensor Signal from camshaft sensor Not connected Ground from chassis Signal from lambda sensor Signal from throttle potentiometer Signal from air mass meter Ground from chassis Signal from speedometer Gear position information from automatic gear* Status signal from air conditioning system* Engine speed signal to revolution counter Not connected Power supply to throttle potentiometer Engine control lamp Control signal to lambda sensor pre-heater Power supply from ain relay Control signal to ignition amplifier, cylinder 2 & 3 Not connected Control signal to ignition amplifier, cylinder 1 & 4 Ground from chassis Control signal to EGR-valve Not connected Control signal to secondary air injection Not connected
46. 47. 48. 49. 50. 51. 52. 53.
Power supply from main relay Power from ignition switch (Terminal 15) Control signal to injeciton valve, cylinder 4 Control signal to injeciton valve, cylinder 2 Control signal to injeciton valve, cylinder 1 Control signal to injeciton valve, cylinder 3 Control signal to idle speed correction valve Control signal to the air conditioning compressor relay* 54. Not connected 55. Diagnosis
Wiring
55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 A 01090253-1
TROUBLE-SHOOTING SIMTEC 56.0/56.1
WIRING DIAGRAM
Wiring Diagram 2,0 litre – Vectra/Cavalier and Calibra
This wiring diagram is an example. Check in the relevant workshop manual for the diagram of the car you are working with. Control unit IM O
ATS
18
47
37
46
+
+
+
+
Ignition amplifier 2 15
Air mass meter 16
A
36
B D
Lambda sensor
7 25
+5 15
48 3 1 2
3 1 2
Camshaft sensor
Throttle potentiometer
2 3 1
8 5B 8 7B
+5
6
44
2 5
M
3
30
2
Main relay /Fuel pump relay
85
30
86
4
87
8
Secondary air pump relay
8 7A
Secondary air pump Secondary air valve
5
17
A B
Tank ventilation valve
6 42
P N R 1 2 3
2 1
EGR-valve
10 11 52 30
12 31 53 29 9
A 01090253-1
9 4
86
Fuel pump
19
Coolant temp. sensor Air temp. sensor
87
51
1 20
34 26
85
8
50
22 4 1 2
Knock sensor
Injection valves
1
49
2 21 3
SIM TEC
Crankshaft sensor
Speedometer
Ignition switch
30
C
AC
Battery
1
38
3241
Automatic gear box
+
3 40
27 8
-
24
28
2 1
Idle speed correction valve
14 32 35
Dashboard
13 55
Diagnosis
41
67