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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Mechanical - 3.6L (Ly7) (Repair Procedures -- 5 Of 5)) >> Off-Vehicle Repair Instructions - Part 4 >> Engine Wiring Harness Assembly Installation

Engine Wiring Harness Assembly Installation

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Locating Engine Control Module (ECM) Bracket & Bolts
    GM945456Courtesy of GENERAL MOTORS CORP.
  1. Install the engine control module (ECM) bracket.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Loosely install the ECM bracket bolts.

    Tighten: 

    1. Tighten the side ECM bracket bolts to 10 N.m (89 lb in).
    2. Tighten the front ECM bracket bolts to 23 N.m (17 lb ft).

    3. Fig 2: Identifying ECM Module Bolts
    GM945462Courtesy of GENERAL MOTORS CORP.
  3. Install the ECM module to the ECM bracket.
  4. Install the ECM module bolts.

    Tighten:  Tighten the ECM module bolts to 10 N.m (89 lb in).

    5. Fig 3: Engine Wiring Harness
    GM945788Courtesy of GENERAL MOTORS CORP.
  5. Install the engine wiring harness to the engine.
    6. Fig 4: Locating Engine Wiring Harness To Right Camshaft Position Sensors
    GM945779Courtesy of GENERAL MOTORS CORP.
  6. Connect the engine wiring harness to the right camshaft position sensors.
    7. Fig 5: View Of Engine Wiring Harness Ground Bolt To ECM Bracket
    GM945775Courtesy of GENERAL MOTORS CORP.
  7. Install the engine wiring harness ground bolt to the ECM bracket.

    Tighten:  Tighten the engine wiring harness ground bolt to 10 N.m (89 lb in).

    8. Fig 6: View Of Wiring Harness Ground Bolt At Side Of Right Cylinder Head
    GM945769Courtesy of GENERAL MOTORS CORP.
  8. Install the engine wiring harness ground bolt to the side of the right cylinder head.

    Tighten:  Tighten the engine wiring harness ground bolt to 10 N.m (89 lb in).

    9. Fig 7: View Of Engine Wiring Harness To Evaporative Emission (EVAP) Solenoid
    GM945766Courtesy of GENERAL MOTORS CORP.
  9. Connect the engine wiring harness to the evaporative emission (EVAP) solenoid.
    10. Fig 8: Locating Engine Wiring Harness To Right Oxygen Sensor Harness
    GM945748Courtesy of GENERAL MOTORS CORP.
  10. Connect the engine wiring harness to the right oxygen sensor harness.
    11. Fig 9: View Of Right Knock Sensor And Electrical Connector
    GM945742Courtesy of GENERAL MOTORS CORP.
  11. Connect the engine wiring harness to the right knock sensor.
    12. Fig 10: Locating Engine Wiring Harness To Generator
    GM945738Courtesy of GENERAL MOTORS CORP.
  12. Connect the engine wiring harness to the generator.
    13. Fig 11: Identifying Engine Wiring Harness To Fuel Injector Harness
    GM945733Courtesy of GENERAL MOTORS CORP.
  13. Connect the engine wiring harness to the fuel injector harness.
    14. Fig 12: View Of Right Ignition Coils Electrical Connectors
    GM945711Courtesy of GENERAL MOTORS CORP.
  14. Connect the engine wiring harness to the right ignition coils.
    15. Fig 13: View Of Engine Wiring Harness To Right Camshaft Position Actuator Valves
    GM945689Courtesy of GENERAL MOTORS CORP.
  15. Connect the engine wiring harness to the right camshaft position actuator valves.
    16. Fig 14: View Of Right Camshaft Cover Wiring Harness Connector - Front
    GM945682Courtesy of GENERAL MOTORS CORP.
  16. Connect the engine wiring harness to the front of the right camshaft cover.
    17. Fig 15: Locating ECM Ground Harness Ring Terminal Screw
    GM945670Courtesy of GENERAL MOTORS CORP.
  17. Position the ECM ground harness ring terminal to ECM lug and install the ECM ground harness ring terminal screw.

    Tighten:  Tighten the ECM ground harness ring terminal screw to 4.5 N.m (40 lb in).

    18. Fig 16: View Of Engine Wiring Harness To Left Side Of Throttle Body/Intake Manifold
    GM945597Courtesy of GENERAL MOTORS CORP.
  18. Connect the engine wiring harness to the left side of the throttle body/intake manifold.
    19. Fig 17: View Of Right Camshaft Cover Wiring Harness Connector - Top
    GM945536Courtesy of GENERAL MOTORS CORP.
  19. Connect the engine wiring harness to the top of the right camshaft cover.
    20. Fig 18: View Of Engine Wiring Harness Bracket Bolt - Top Of ECM Bracket
    GM945521Courtesy of GENERAL MOTORS CORP.
  20. Install the engine wiring harness bracket bolt to the top of the ECM bracket.

    Tighten:  Tighten the engine wiring harness bracket bolt to 10 N.m (89 lb in).

    21. Fig 19: View Of Engine Wiring Harness Bracket Bolt - Side Of ECM Bracket
    GM945513Courtesy of GENERAL MOTORS CORP.
  21. Install the engine wiring harness bracket bolt to the side of the ECM bracket.

    Tighten:  Tighten the engine wiring harness bracket bolt to 23 N.m (17 lb ft).

    22. Fig 20: Identifying Engine Wiring Harness To Crankshaft Position Sensor
    GM945468Courtesy of GENERAL MOTORS CORP.
  22. Connect the engine wiring harness to the crankshaft position sensor.
  23. Install the engine wiring harness bracket bolt.

    Tighten:  Tighten the engine wiring harness bracket bolt to 50 N.m (37 lb ft).

    24. Fig 21: View Of ECM Wiring Harness Connector
    GM945720Courtesy of GENERAL MOTORS CORP.
  24. Connect the engine wiring harness to the ECM module.
    25. Fig 22: View Of Battery Cable Ground Bolt To Rear Of Left Cylinder Head
    GM945449Courtesy of GENERAL MOTORS CORP.
  25. Install the battery cable ground.
  26. Install the battery cable ground bolt to the rear of the left cylinder head.

    Tighten:  Tighten the battery cable ground bolt to 50 N.m (37 lb ft).

    27. Fig 23: Identifying Battery Cable/Generator Cable & Nut To Generator
    GM945443Courtesy of GENERAL MOTORS CORP.
  27. Connect the battery cable to the generator.
  28. Install the battery cable/generator nut to the generator.

    Tighten:  Tighten the battery cable/generator nut to 13 N.m (115 lb in).

    29. Fig 24: View Of Battery Cable Harness To Right Side Of The Engine
    GM945439Courtesy of GENERAL MOTORS CORP.
  29. Connect the battery cable harness to the right side of the engine.
    30. Fig 25: Identifying Barometric Pressure Sensor And Electrical Connector
    GM945437Courtesy of GENERAL MOTORS CORP.
  30. Connect the engine wiring harness to the barometric pressure (BARO) sensor.
    31. Fig 26: Locating Engine Wiring Harness To Left Camshaft Position Sensors
    GM945434Courtesy of GENERAL MOTORS CORP.
  31. Connect the engine wiring harness to the left camshaft position sensors.
    32. Fig 27: View Of Left Cylinder Head Wiring Harness Ground Bolt
    GM945431Courtesy of GENERAL MOTORS CORP.
  32. Install the engine wiring harness ground bolt to the left cylinder head.

    Tighten:  Tighten the engine wiring harness ground bolt to 10 N.m (89 lb in).

    33. Fig 28: View Of Coolant Temperature Sensor And Electrical Connector
    GM945424Courtesy of GENERAL MOTORS CORP.
  33. Connect the engine wiring harness to the engine coolant temperature (ECT) sensor.
    34. Fig 29: View Of Throttle Body Electrical Connector
    GM945417Courtesy of GENERAL MOTORS CORP.
    NOTE: Ensure proper engagement of the wiring harness connector. The wiring harness connector must be installed straight onto the component connector and firmly seated. Visually inspect the connector to ensure that the connector latches are engaged and locked. Any damage to the connector or wiring must be repaired. Failure to follow this procedure can lead to an intermittent electrical connection, driveability concerns, and/or wiring harness or wiring harness connector damage or failure.
  34. Connect the engine wiring harness to the throttle body connector.
    35. Fig 30: Identifying Engine Wiring Harness To Starter Motor Solenoid
    GM945408Courtesy of GENERAL MOTORS CORP.
  35. Connect the engine wiring harness to the starter motor solenoid.
    36. Fig 31: Locating Engine Wiring Harness To Left Oxygen Sensor Harness
    GM945400Courtesy of GENERAL MOTORS CORP.
  36. Connect the engine wiring harness to the left oxygen sensor harness.
    37. Fig 32: View Of Engine Wiring Harness To Oil Pressure Sender
    GM945276Courtesy of GENERAL MOTORS CORP.
  37. Connect the engine wiring harness to the oil pressure sender.
    38. Fig 33: View Of Communicator And Intake Manifold Runner Control Solenoid Electrical Connectors
    GM945390Courtesy of GENERAL MOTORS CORP.
  38. Connect the engine wiring harness to the communicator valve.
    39. Fig 34: View Of Left Knock Sensor And Electrical Connector
    GM945380Courtesy of GENERAL MOTORS CORP.
  39. Connect the engine wiring harness to the left knock sensor.
    40. Fig 35: View Of Left Ignition Coils Wiring Harness Connectors
    GM945375Courtesy of GENERAL MOTORS CORP.
  40. Connect the engine wiring harness to the left ignition coils.
    41. Fig 36: Locating Engine Wiring Harness To Left Camshaft Position Actuator Valves
    GM945358Courtesy of GENERAL MOTORS CORP.
  41. Connect the engine wiring harness to the left camshaft position actuator valves.
    42. Fig 37: Identifying Engine Wiring Harness To A/C Compressor
    GM945350Courtesy of GENERAL MOTORS CORP.
  42. Connect the engine wiring harness to the A/C compressor.
    43. Fig 38: View Of Left Camshaft Cover Wiring Harness Connector - Front
    GM945343Courtesy of GENERAL MOTORS CORP.
  43. Connect the engine wiring harness to the front of the left camshaft cover.
    44. Fig 39: View Of Left Camshaft Cover Wiring Harness Connectors
    GM945337Courtesy of GENERAL MOTORS CORP.
  44. Connect the engine wiring harness to the top of the left camshaft cover.
    45. Fig 40: View Of Engine Wiring Harness Bracket Bolts
    GM945329Courtesy of GENERAL MOTORS CORP.
  45. Install the engine wiring harness bracket bolts to the lower left side of the engine.

    Tighten:  Tighten the engine wiring harness bracket bolts to 10 N.m (89 lb in).

    46. Fig 41: Locating Engine Wiring Harness Bracket Bolt & Engine Wiring Harness Bracket Stud
    GM945316Courtesy of GENERAL MOTORS CORP.
  46. Install the engine wiring harness bracket bolt to the lower right side of the engine.

    Tighten:  Tighten the engine wiring harness bracket bolt to 10 N.m (89 lb in).

  47. Install the engine wiring harness bracket stud to the lower right side of the engine.

    Tighten:  Tighten the engine wiring harness bracket stud to 22 N.m (16 lb ft).

    48. Fig 42: Identifying Battery Cable Harness To Starter Motor
    GM945310Courtesy of GENERAL MOTORS CORP.
  48. Connect the battery cable harness to the starter motor.
    49. Fig 43: View Of Radiator Outlet Pipe & Bolt
    GM945302Courtesy of GENERAL MOTORS CORP.
  49. Install the radiator outlet pipe.
  50. Install the radiator outlet pipe bolt to the thermostat housing and the generator bracket.

    Tighten:  Tighten the radiator outlet pipe bolt to the thermostat housing and the generator bracket to 10 N.m (89 lb in).

  51. Install the radiator outlet pipe bolt to the rear of the right cylinder head.

    Tighten:  Tighten the radiator outlet pipe bolt to 50 N.m (27 lb ft).

    52. Fig 44: Identifying Right Exhaust Manifold Lower Insulator & Nuts
    GM1370536Courtesy of GENERAL MOTORS CORP.
  52. Install the right exhaust manifold lower insulator.
  53. Install the right exhaust manifold lower insulator nuts.

    Tighten:  Tighten the right exhaust manifold lower insulator nuts to 10 N.m (89 lb in).

    54. Fig 45: Locating Intake Manifold Insulator & Nut
    GM1370531Courtesy of GENERAL MOTORS CORP.
  54. Install the intake manifold insulator.
  55. Install the intake manifold insulator nut.

    Tighten:  Tighten the intake manifold insulator nut to 10 N.m (89 lb in).

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