Wiring Harness: Service and Repair

Engine Wiring Harness - 4.4L

Service Repair No - 86.70.17

Removal
1. Disconnect the battery ground cable.

WARNING: Do not work on or under a vehicle supported only by a jack. Always support the vehicle on safety stands.

2. Raise and support the vehicle.
3. Remove the purge valve assembly.
4. Remove the A/C compressor.
5. Disconnect the suppressor electrical connector.
6. Remove the RH engine cover bracket.
^ Remove the 2 nuts.
^ Release the electrical connector.





7. Position the coolant hoses aside for access.
^ Remove the 3 nuts.
^ Release the coolant hose bracket.





8. Disconnect the battery positive cable from the junction box.
^ Open the cover.
^ Remove the nut.





9. Remove the engine control module (ECM) cover.
^ Remove the 10 Torx screws.





10. Release the engine wiring harness.
^ Disconnect the 2 electrical connectors.
^ Release the grommet.





11. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.





12. Disconnect the throttle body electrical connector.





13. Disconnect the knock sensors (KS) electrical connector.





14. Disconnect the mass air flow (MAF) sensor electrical connector.





15. Remove the ignition coil-on-plug cover.
^ Release the 2 clips.
^ Repeat the above procedure for the other side.





16. Disconnect the variable camshaft timing (VCT) oil solenoid electrical connector.
^ Repeat the above procedure for the RH side.





17. Disconnect the 4 electrical connectors on the LH injectors.
^ Release the 2 clips.
^ Repeat the above procedure for the RH side.





18. Disconnect the 4 LH ignition coil-on-plug connectors.
^ Release the 2 clips.
^ Repeat the above procedure for the RH side.





19. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
20. Disconnect the EGR valve electrical connector.





21. Disconnect the fuel temperature sensor electrical connector.





22. Disconnect the camshaft position (CMP) sensor electrical connector.
^ Repeat the above procedure for the RH side.





23. Disconnect the cylinder head earth connector.
^ Release the 3 clips.





24. Disconnect the cooling fan control electrical connector.





25. Release the 4 A/C harness retaining clips.





26. Disconnect the crankshaft position (CKP) sensor electrical connector.





27. Remove the starter motor heat shield.
^ Remove the 2 bolts.





28. Disconnect the starter motor connector.





29. Disconnect the oil temperature and oil pressure sensors.





30. Disconnect the generator connector.





31. Release the 4 clips securing the generator harness.





32. Disconnect the front LH HO2S and release the clip.





33. Disconnect the RH HO2S and release the clip.





34. Remove the engine wiring harness.

Installation
1. Install the engine wiring harness.
2. Connect the HO2S electrical connectors.
^ Carefully secure the clips.
3. Connect the starter motor.
4. Connect the oil temperature and oil pressure sensors.
5. Connect the generator electrical connector.
^ Secure the clips.
6. Connect the CKP sensor electrical connector.
7. Connect the cooling fan electrical connector.
8. Connect the cylinder head earth ground connector.
^ Tighten the bolt to 10 Nm (7 ft. lbs.).
9. Connect the EGR valve electrical connector.
10. Connect the CMP sensor electrical connector.
^ Repeat the above procedure for the other side.
11. Connect the fuel temperature sensor electrical connector.
12. Connect the MAP sensor electrical connector.
13. Connect the KS.
14. Connect the ECT sensor electrical connector.
15. Connect the ignition coil-on-plug electrical connections.
^ Install the clips.
^ Repeat the above procedure for the other side.
16. Connect the fuel injector electrical connectors.
^ Install the clips.
^ Repeat the above procedure for the other side.
17. Connect the VCT oil solenoid electrical connector.
^ Repeat the above procedure for the other side.
18. Install the ignition coil-on-plug cover.
^ Secure the clips.
^ Repeat the above procedure for the other side.
19. Connect the MAF sensor electrical connector.
20. Connect the throttle body electrical connector.
^ Secure the clips.
21. Connect the MAP sensor electrical connector.
22. Secure the engine wiring harness.
^ Install the grommet.
^ Connect the electrical connectors.
23. Install the ECM cover.
^ Tighten the Torx screws.
24. Connect the battery positive cable to the junction box.
^ Tighten the nut to 25 Nm (18 ft. lbs.).
^ Close the cover.
25. Install the A/C compressor.
26. Install the engine cover mounting brackets.
^ Tighten the nuts to 6 Nm (4 ft. lbs.).
^ Attach the wiring harness connector blocks to the brackets.
27. Connect the suppressor electrical connector.
28. Install the purge valve assembly.
29. Connect the battery ground cable.