Jaguar XJ (X350). Service manual — part 1041

Fluid Pump

Item

Part Number

Description

1

Fluid pump housing

2

Intermediate plate

3

Centring plate

4

Stator shaft

5

Intake port

6

To mesh filter

7

Seal

8

Bearing

9

Retaining clip

10

Shaft seal

11

Impeller

12

Ring gear

Fluid Pan, Gasket and Filter

The transmission fluid pan, gasket and filter is a one piece assembly, all transmission fluid is drawn

from the transmission fluid pan by the fluid pump and passes through the fluid filter.

Transmission Control Module (TCM) and Main Control Valve Body

Electrostatic Discharge (ESD)

CAUTION: When working with the transmission control module (TCM) and main control

valve body, all suitable safety precautions must be taken to protect the component against

electrostatic discharge (ESD). Failure to follow these instructions may result in component damage.

Make sure all possible safety precautions are taken to protect the TCM and main control valve body

unit against ESD.

Personal Wrist-Band Earthing

Earthing (grounding) by means of a wrist band or strap is the most reliable method of diverting

electrostatic charges away from working personnel, and should therefore be used wherever possible,

particularly if the person concerned is working while seated. The wrist band earthing (grounding)

device consists of a bracelet closely attached to the wrist and a spiral earthing (grounding) cable

connecting it to the earthing (grounding) contact point. This system must include a quick-release

device so that the wrist can be released in the event of danger.

Shoes and Foot Earthing Straps

Electrically conductive shoes should be worn by persons who mainly work standing up or either

standing or sitting in ESD protection zones, particularly if wrist band earthing (grounding) is

impracticable. The standard calls for ESD shoes to record values between 0 and 35 Megga-ohms

(MOhm) resistance. However, for antistatic working shoes resistance values between 0.1 and 1000

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MOhm are called for, and a through-conducting resistance for protective shoes of 0.1 to 100 MOhm.

A lower limit value of not less than 0.1 MOhm must be maintained on account of the contact voltage

risk. For this reason the minimum value has been set contrary to the standard at the higher figure of

0.75 MOhm.

Transmission Control Module (TCM) and Main Control Valve Body

The transmission control module (TCM) and main control valve body is a combination of hydraulic

and electronic control units. Both these modules are installed in the transmission, in the fluid pan.

This technical principle has the following advantages:

Minimum tolerances (TCM is mated to solenoids)

Better coordination of gear shifts

Increased refinement

Optimized shift quality

Good reliability, since the number of plug connections and interfaces is reduced.

Transmission Control Module (TCM) and Main Control Valve Body

Item

Part Number

Description

1

TCM

2

Output speed sensor

3

Transmission fluid temperature sensor

4

Position switch

5

Pressure regulator 6

6

Solenoid valve

7

Pressure regulator 5

8

Pressure regulator 4

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