Ignition System: Removal & Installation Jeep Liberty I

REMOVAL

The ASD relay is located in the Power Distribution Center (PDC). Refer to label on PDC cover for relay location.

Scheme 8

1. Remove PDC cover.
2. Remove relay from PDC.
3. Check condition of relay terminals and PDC connector terminals for damage or corrosion. Repair if necessary before installing relay.
4. Check for pin height (pin height should be the same for all terminals within the PDC connector). Repair if necessary before installing relay.

INSTALLATION

The ASD relay is located in the Power Distribution Center (PDC). Refer to label on PDC cover for relay location.

1. Install relay to PDC.
2. Install cover to PDC.

The 2 knock sensors are bolted into the cylinder block under the intake manifold.

Scheme 9

Note. The left sensor is identified by an identification tag (LEFT). It is also identified by a larger bolt head. The Powertrain Control Module (PCM) must have and know the correct sensor left/right positions. Do not mix the sensor locations.

1. Disconnect knock sensor dual pigtail harness from engine wiring harness. this connection is made near rear of left valve cover.
2. Remove intake manifold. Refer to Engine section.
3. Remove sensor mounting bolts. Note foam strip on bolt threads. This foam is used only to retain the bolts to sensors for plant assembly. It is not used as a sealant. Do not apply any adhesive, sealant or thread locking compound to these bolts.
4. Remove sensors from engine.

Note. The left sensor is identified by an identification tag (LEFT). It is also identified by a larger bolt head. The Powertrain Control Module (PCM) must have and know the correct sensor left/right positions. Do not mix the sensor locations.

1. Thoroughly clean knock sensor mounting holes.
2. Install sensors into cylinder block. NOTE: Over or under tightening the sensor mounting bolts will affect knock sensor performance, possibly causing improper spark control. Always use the specified torque when installing the knock sensors. The torque for the knock senor bolt is relatively light for an 8 mm bolt. NOTE: Note foam strip on bolt threads. This foam is used only to retain the bolts to sensors for plant assembly. It is not used as a sealant. Do not apply any adhesive, sealant or thread locking compound to these bolts.
3. Install and tighten mounting bolts. Refer to torque specification.
4. Install intake manifold. See «2.4L DOHC 4-CYLINDER»(ref-166720) or «3.7L V6 SOHC»(ref-166732) article.
5. Connect knock sensor wiring harness to engine harness at rear of intake manifold.

The coil capacitor is located in the engine compartment and is attached (clipped) to a wiring harness trough near the brake power booster (graphic not available).

1. Unclip capacitor from wiring harness trough.
2. Disconnect electrical connector at capacitor.

1. Connect electrical connector to coil capacitor.
2. Position capacitor into v-clip on wiring harness trough.