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Seating: Overview Jaguar XJ X351

Seats ~1029 words

OVERVIEW

Front Seats

Various options are available for the front seats with regard to temperature control and electrical adjustment. Seats are non-heated, heated or heated and cooled (climate), with the following adjustment options

  1. 10-way adjustment on the driver seat and 8-way adjustment on the passenger seat.
  2. 16-way adjustment on the driver seat and 12-way adjustment on the passenger seat.
  3. 18-way adjustment on the driver and passenger seats.

8-way adjustments consist of seat slide, seat height, squab recline and 2-way lumbar adjustment. 10-way adjustment adds cushion tilt. 12-way adjustment adds head restraint. 16-way adjustment adds cushion extension and replaces 2-way lumbar adjustment with 4-way. 18-way adjustment adds squab bolster adjustment. The controls for seat adjustment are installed in the outboard side shield of the related seat cushion.

The driver seat on all options has a 3-channel memory for easy recall of stored position settings for the seat, steering column and door mirrors. Passenger seats with 18-way adjustment also have a 3-channel memory. The controls for memory operation are in the related front door casing. Lumbar and squab bolster settings are not included in the memory function.

Some climate seats with 18-way adjustment also incorporat a massage function. The massage function is produced using additional lumbar cells. Operation of the massage function is controlled from the Climate / Front Climate / Front Seats menu of the TSD (touch screen display).

Operation of the temperature settings for heated and climate seats is controlled from the Climate / Front Climate / Front Seats menu of the TSD.

Both front seats incorporate an AWS (anti-whiplash system) consisting of active, energy absorbent backrest mechanisms. Together with correctly positioned headrests, the AWS helps reduce the likelihood of neck and spinal injury in the event of a rear impact. In a low speed rear impact, AWS automatically moves and reclines the backrest by a small amount, to change the posture of the seat occupant and reduce the relative front to rear motion between body and head.

A map pocket is installed on the rear of each front seat squab. Depending on trim level, some vehicles also have a folding tray attached to the rear of the squabs.

Rear Seats

The following options are available for the two outer rear seats with regard to temperature control

  1. Non-heated seats.
  2. Heated seats.
  3. Climate seats.

Operation of the temperature settings for heated and climate seats is controlled from the rear climate control panel and the Climate / Rear Climate / Rear Seats menu of the TSD.

PRINCIPLE OF OPERATION

For a detailed description of the seats and seat operation, refer to Component Location and Overview and System Operation And Component Description . .

PINPOINT TEST G: HEATING AND COOLING - NOISY OPERATION

Pinpoint Test G

G1 CHECK FOR STORED DTC
  1. Check the Climate Controlled Seat Module for stored DTC's.
G2 DRIVER OR FRONT PASSENGER SEAT BACKREST CLIMATE ASSEMBLY - NOISE
  1. There is a known issue which effects a limited number of vehicles where under acceleration of the vehicle the occupant of seat can deform the suspension mat (snake wire) which then presses on the casing of the seat backrest climate assembly, this causes the casing to distort and the noise issue to occur. If contact has occurred there will be a witness mark on the casing. Carry out visual inspection of the seat backrest climate assembly that has been identified as noisy by the customer.
G3 DRIVER OR FRONT PASSENGER SEAT CLIMATE ASSEMBLY - NOISE 2
  1. Operate the heat and cool function of the seat. Listen for a 'WAH WAH' noise (the fan speeds up and slows down repeatedly).
G4 DRIVER OR FRONT PASSENGER SEAT BACKREST CLIMATE ASSEMBLY - NOISE LEVEL COMPARISON
  1. Compare the noise level of the suspect climate seat assembly to another climate seat assembly.

PINPOINT TEST I: HEATING AND COOLING - HEAT OR COOL OPERATION SLOW

Pinpoint Test I

I1 CHECK FOR STORED DTC
  1. Check the Climate Controlled Seat Module for stored DTC's.
I2 DRIVER OR FRONT PASSENGER SEAT BACKREST CLIMATE ASSEMBLY - FUNCTIONALITY CHECK
  1. Check the heat and cool function of the backrest?
I3 DRIVER OR FRONT PASSENGER SEAT CUSHION CLIMATE ASSEMBLY - FUNCTIONALITY CHECK
  1. Check the heat and cool function at the cushion.
I4 CUSHION BELLOWS
  1. Check the condition of the bellows.
I5 BACKREST BELLOWS DUCT
  1. Check the security of the bellows duct.
I6 BACKREST BELLOWS
  1. Check the security of the bellows.
I7 DRIVER OR FRONT PASSENGER SEAT BACKREST CLIMATE ASSEMBLY - OPERATION COMPARISON
  1. Compare the operation of the suspect climate seat assembly to another climate seat assembly.

PINPOINT TEST J: HEATING AND COOLING - INTERMITTENT OPERATION

Pinpoint Test J

J1 CHECK FOR STORED DTC
  1. Check the Climate Controlled Seat Module for stored DTC's.
J2 CABLE CONNECTION CHECK
  1. Identify from customer concern or stored DTC's which Seat Climate Assembly is operating intermittently and confirm the harness connector is fully connected.

PRINCIPLES OF OPERATION

Heated seats incorporate heater elements in the cushion and the backrest of the seat. Each cushion heater element has a thermal sensor, which supplies a feedback temperature signal to the related seat heater module. The backrest heater elements do not have a thermal sensor, and are regulated at the same temperature as the cushion heater elements.

For a detailed description of the seat heater mat, refer to Component Location and Overview and System Operation And Component Description .

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