Jaguar X-Type Sedan and Estate (Wagon). Service manual — part 302

Published: 11-May-2011

Engine Ignition - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27 - Ignition
Coil-On-Plug RH

Removal and Installation

Removal

1. Disconnect the battery ground cable. For additional information, refer to

Section

414-01 Battery, Mounting and Cables

.

2. Remove the intake manifold. For additional information, refer to Section

303-01A Engine

Section

303-01B Engine

.

3. Disconnect the electrical connectors.

4. Remove the ignition coils.

Installation

1. To install, reverse the removal procedure.

Tighten to 6 Nm.

Published: 11-May-2011

Glow Plug System -

Torque Specifications

Description

Nm

lb-ft

lb-in

Glow plug

13

10

-

Glow plug electrical connector retaining nut

2

-

18

Main wiring harness to glow plug wiring harness nut

4

-

35

Glow plug terminal block retaining screw

5

-

44

Published: 11-May-2011

Glow Plug System - Glow Plug System

Description and Operation

Item

Part Number

Description

1

-

Glow plug indicator lamp

2

-

Glow plug fuse

3

-

Glow plug relay

4

-

Glow plug wire

5

-

Glow plug

The glow plugs are located in the side of the cylinder head and aid engine starting and efficiency. The glow plugs and the glow plug
indicator lamp are controlled by the engine control module (ECM).

The glow plugs preheat the combustion chambers, which aids cold starting. During the preheat stage, the ECM receives an engine
temperature signal from the cylinder head temperature (CHT) sensor and this determines the preheat time. The lower the temperature, the
longer the preheat time. There is a maximum preheat time of 8 seconds at -20° C (-4° F)or lower. At temperatures above 80° C (176° F)
there is no preheat phase.

Once the engine has started, the glow plugs enter an after-glow phase. The after-glow phase helps to improve idling and reduce
hydrocarbon emissions through more efficient combustion just after starting. The after-glow phase only operates at engine speeds below
2500 RPM, above that, the after-glow phase is interrupted to increase the durability of the glow plugs. There is a maximum after-glow time

of 30 seconds at -20° C (-4° F) or lower. At temperatures above 50°C (122° F) there is no after-glow phase.