Cruze

Engine Control Module Wiring Harness Replacement

1. Open the bonnet.
2. Remove the battery cover. Refer to Battery Cover Replacement .
3. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .



4. Disconnect the 2 engine control module wiring harness plugs (1) from the engine control module (2).



5. Remove the engine control module bracket (2) along with the engine control module (1) from the battery tray (3).
6. Remove the battery tray. Refer to Battery Tray Replacement .
7. Remove the windscreen washer solvent container filler tube . Refer to Windscreen Washer Solvent Container Filler Tube Replacement .
8. Remove the front compartment fuse block. Refer to Front Compartment Fuse Block Replacement .
9. Remove the engine sight shield. Refer to Engine Sight Shield Replacement .



10. Remove the wiring harness ground cable nut (2) and remove the wiring harness ground cable (3).
11. Remove the wiring harness plug (1) in top direction from the front compartment fuse block housing.
12. Disconnect the wiring harness connection adaptor plug (4).
13. Remove the 2 wiring harness clips from the drivetrain and front suspension frame front inner support and from the charge air cooler outlet hose.



14. Disconnect the exhaust temperature sensor wiring harness plug (5).
15. Unclip the heated oxygen sensor wiring harness plug (3) from the retainer clip (4) and disconnect the heated oxygen sensor wiring harness plug (3).
16. Disconnect the exhaust pressure differential sensor hose wiring harness plug (2).
17. Disconnect the camshaft position sensor wiring harness plug (1).



18. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
19. Remove the 2 charge air cooler inlet air hose bolts (7) from the 2 charge air cooler inlet air hose nuts (5). Hang the charge air cooler inlet air hose (6) aside.
20. Disconnect the exhaust temperature sensor wiring harness plug (2).
21. Disconnect the exhaust temperature sensor wiring harness plug (4) and unclip the wiring harness clip (3) from the steering pump.
22. Disconnect the turbocharger wastegate actuator wiring harness plug (8).
23. Disconnect the mass air flow sensor wiring harness plug (1) and remove the wiring harness clip from the air filter housing.



24. Disconnect the oil pressure sensor wiring harness plug (2).
25. Remove the wiring harness clip (3) from the charge air control vacuum hose.
26. Remove the 2 wiring harness channel bolts (1) from the wiring harness channel.
27. Disconnect the inlet air pressure/temperature sensor wiring harness plug (5).
28. Disconnect the 2 wiring harness clips (4) from the oil filter assembly and from the inlet manifold.



29. Disconnect the reverse lamp switch wiring harness plug (2) from the transmission.
30. Remove the wiring harness clip (1) from the transmission.
31. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
32. Remove the engine compartment insulator. Refer to Front Compartment Insulator Replacement .



33. Disconnect the 2 knock sensor wiring harness plugs (3, 6).
34. Disconnect the alternator wiring harness plug (4).
35. Disconnect the starter wiring harness plug (7).
36. Disconnect the vacuum solenoid valve wiring harness plug (1) and the vacuum solenoid valve wiring harness plug (2).
37. Remove the 2 wiring harness clips (5) from the 2 brackets.



38. Disconnect the crankshaft position sensor wiring harness plug (3).
39. Disconnect the throttle body wiring harness plug (1).
40. Unclip the wiring harness clip (2) from the charge air cooler outlet hose.



41. Disconnect the air conditioning wiring harness plug (1) and the engine oil level indicator wiring harness plug (2). Hang the wiring harness aside.
42. Lower the vehicle.



43. Remove the front charge air cooler outlet hose bolt (2) from the wiring harness bracket.
44. Remove the front charge air cooler outlet hose clip (4) from the rear charge air cooler outlet hose (3). Hang the front charge air cooler hose (1) aside.



45. Unclip and disconnect the glow plug wiring harness plug (2) from the engine wiring harness bracket.
46. Disconnect the fuel pump wiring harness plug (3)
47. Disconnect the engine coolant temperature sensor wiring harness plug (5).
48. Unclip the 4 wiring harness clips (1, 4) from the wiring harness bracket.



49. Disconnect the vacuum solenoid valve wiring harness plug (8).
50. Disconnect the exhaust gas recirculation valve wiring harness plug (9).
51. Disconnect the inlet actuator valve wiring harness plug (7).
52. Disconnect the fuel injection rail pressure sensor wiring harness plug (3).
53. Disconnect the 4 glow plug wiring harness plugs (5).
54. Disconnect the 4 fuel injector wiring harness plugs (1).
55. Unclip the 4 engine wiring harness clips (2, 4) from the camshaft cover.
56. Unclip the engine wiring harness channel (6) in top direction from the 3 exhaust gas recirculation cooler brackets.
57. Remove the engine wiring harness from the vehicle.

1. Position the engine wiring harness on the vehicle.
2. Clip the engine wiring harness channel (6) to the 3 exhaust gas recirculation cooler brackets.
3. Clip the 4 engine wiring harness clips (2, 4) to the camshaft cover.
4. Connect the 4 fuel injector wiring harness plugs (1).
5. Connect the fuel injection rail pressure sensor wiring harness plug (3).
6. Connect the 4 glow plug wiring harness plugs (5).
7. Connect the fuel injection pressure sensor wiring harness plug (3).
8. Connect the inlet actuator valve wiring harness plug (7).
9. Connect the exhaust gas recirculation valve wiring harness plug (9).
10. Connect the vacuum solenoid valve wiring harness plug (8).



11. Clip the 4 wiring harness clips (1, 4) to the wiring harness bracket.
12. Connect the engine coolant temperature sensor wiring harness plug (5).
13. Connect the fuel pump wiring harness plug (3).
14. Clip and connect the glow plug wiring harness plug (2) to the engine wiring harness bracket.

Caution: Refer to Fastener Caution in the Preface section.




15. Position the front charge air cooler outlet hose (1) along with the front charge air cooler outlet hose clip (4) to the rear charge air cooler outlet hose (3) and tighten the clamp to 3.5 N·m (31 lb in).
16. Install the front charge air cooler outlet hose bolt (2) to the wiring harness bracket and tighten to 10 N·m (89 lb in).
17. Raise the vehicle.



18. Position the wiring harness.
19. Connect the air conditioning wiring harness plug (1) and the engine oil level indicator wiring harness plug (2).



20. Clip the wiring harness clip (2) to the charge air cooler outlet hose.
21. Connect the throttle body wiring harness plug (1).
22. Connect the crankshaft position sensor wiring harness plug (3).



23. Install the 2 wiring harness clips (5) to the 2 brackets.
24. Connect the vacuum solenoid valve wiring harness plug (1) and the vacuum solenoid valve wiring harness plug (2).
25. Connect the starter wiring harness plug (7).
26. Connect the alternator wiring harness plug (4).
27. Connect the 2 knock sensor wiring harness plugs (3, 6).
28. Install the engine compartment insulator. Refer to Front Compartment Insulator Replacement .
29. Lower the vehicle.



30. Install the wiring harness clip (1) to the transmission.
31. Connect the reverse lamp switch wiring harness plug (2) to the transmission.



32. Connect the 2 wiring harness clips (4) to the oil filter assembly and to the inlet manifold.
33. Connect the inlet air pressure/temperature sensor wiring harness plug (5).
34. Install the 2 wiring harness channel bolts (1) to the wiring harness channel and tighten to 10 N·m (89 lb in).
35. Install the wiring harness clip (3) to the charge air control vacuum hose.
36. Connect the oil pressure sensor wiring harness plug (2).



37. Connect the mass air flow sensor wiring harness plug (1) and install the wiring harness clip to the air filter housing.
38. Connect the turbocharger wastegate actuator wiring harness plug (8).
39. Connect the exhaust temperature sensor wiring harness plug (4) and clip the wiring harness clip (3) to the steering pump.
40. Connect the exhaust temperature sensor wiring harness plug (2).
41. Install the 2 charge air cooler inlet air hose bolts (7) to the 2 charge air cooler inlet air hose nuts (5) and tighten to 22 N·m (16 lb ft)
42. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .



43. Connect the camshaft position sensor wiring harness plug (1).
44. Connect the exhaust pressure differential sensor hose wiring harness plug (2).
45. Clip the heated oxygen sensor wiring harness plug (3) to the retainer clip (4) and connect the heated oxygen sensor wiring harness plug (3).
46. Connect the exhaust temperature sensor wiring harness plug (5).



47. Install the 2 wiring harness clips to the drivetrain and front suspension frame front inner support and to the charge air cooler outlet hose.
48. Connect the wiring harness connection adaptor plug (4).
49. Install the wiring harness plug (1) to the front compartment fuse block housing.
50. Install the wiring harness ground cable (3) and install the wiring harness ground cable nut (2) and tighten to 9 N·m (80 lb in).
51. Install the front compartment fuse block. Refer to Front Compartment Fuse Block Replacement .
52. Install the engine sight shield. Refer to Engine Sight Shield Replacement .
53. Install the windscreen washer solvent container filler tube. Refer to Windscreen Washer Solvent Container Filler Tube Replacement .
54. Install the battery tray. Refer to Battery Tray Replacement .



55. Install the engine control module bracket (2) along with the engine control module (1) to the battery tray (3).



56. Connect the 2 engine control module wiring harness plugs (1) to the engine control module (2).
57. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
58. Install the battery cover. Refer to Battery Cover Replacement .
59. Close the bonnet.