4.0L Engine Wiring Harness (Discovery 3)

Removal

1. Disconnect the ground cable from the battery. For more information, refer to Specification.

2. Remove the engine protection shield. For more information, refer to Engine Protection (76.10.50)

3. Remove the intake manifold. For more information, refer to Intake Manifold (30.15.02)

4. Remove the battery. For more information, refer to Battery (86.15.01)

5. Remove the main power supply cable from the engine compartment fuse box. Remove the bolt.



6. Remove the upper engine compartment heat shield.

• Remove the screw.
• Release the 2 mounting clips.

7. Remove the side wall of the battery compartment.

• Release the positive battery cable and grommet.
• Release the 4 clamps.

8. Remove the engine wiring harness from the battery compartment. Disconnect the two electrical connectors.





9. Release the 2 clips on the wiring harness protective cover.



10. Disconnect the fuel injector electrical connectors. Release the 4 clamps.



11. Disconnect the mass air flow (MAF) sensor electrical connector. Release the clamp.



12. Disconnect the engine coolant temperature (ECT) sensor electrical connector.





13. Disconnect the generator electrical connector.



14. Disconnect the electrical connectors of the knock sensor (KS).



15. Disconnect the cooling fan electrical connector. Release the 2 clamps.



16. Disconnect the camshaft position (CMP) sensor electrical connector. Release the clamp.





17. Disconnect the PCV purge valve electrical connector.



18. Disconnect the electrical connector of the left breather.



19. Remove the wiring harness bridge. Remove 2 bolts.



20. Disconnect the left HO2S sensor and release the clamp.





21. Disconnect the right HO2S sensor and release the clamp.



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



23.

NOTE: Remember the position of the part.

Remove the engine wiring harness.

Installation

1.

NOTE: Align the part to its original position.

Install the engine wiring harness.



2. Connect the crankshaft position (CKP) sensor electrical connector.

3. Connect the heated oxygen sensor electrical connectors.

4. Install the wiring harness bridge. Tighten the bolts. (tightening torque 45 Nm).

5. Connect the breather electrical connector.

6. Connect the PCV valve electrical connector.

7. Connect the CMP sensor electrical connector. Secure the clamp.

8. Connect the cooling fan electrical connector. Carefully tighten the clamps.

9. Connect the electrical connectors of the KS sensor.

10. Install the generator.

11. Connect the ECT sensor electrical connector.

12. Connect the MAF sensor electrical connector. Secure the clamp.

13. Connect the fuel injector electrical connectors. Carefully tighten the clamps.

14. Connect the engine wiring harness.

• Install the clamps onto the wiring harness protective cover.
• Connect and secure the electrical connectors.

15. Install the battery compartment side wall.

• Secure the clamps.
• Install the positive battery cable and grommet.

16. Install the upper engine heat shield.

• Secure the clamps.
• Tighten the screw.

17. Install the main power cable of the fuse box. Insert and tighten the bolts. (tightening torque 10 Nm).

18. Install the battery. For more information, refer to Battery (86.15.01)

19. Install the intake manifold. For more information, refer to Intake Manifold (30.15.02)

20. Install the engine protection screen. For more information, refer to Engine Protection (76.10.50)

21. Connect the ground cable to the battery. For more information, refer to Specification.