04 or 05 XJ8 Winter handling
#1
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Hi everyone,
I'm considering buying either an 04 or 05 XJ8 for my wife, but I'm concerned about the Chicago winters. We both have 4x4's but she's getting rid of hers. Does anyone have experience with the CATS and Traction control in the snow and harsh Chicago weather. I'm concerned she will have issues and I do have 3 kids to think about as well.
Thanks in advance to anyone who can share their experiences....
Paul
I'm considering buying either an 04 or 05 XJ8 for my wife, but I'm concerned about the Chicago winters. We both have 4x4's but she's getting rid of hers. Does anyone have experience with the CATS and Traction control in the snow and harsh Chicago weather. I'm concerned she will have issues and I do have 3 kids to think about as well.
Thanks in advance to anyone who can share their experiences....
Paul
#2
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The traction control system is awesome. Only as good as the tires on it. Also remember it is rear wheel drive versus awd you have now.
Point is, the cars are very safe and handle well. Just be careful and drive it as a rear wheel drive car. You will be fine. Come back and post some pics if you get it.
Point is, the cars are very safe and handle well. Just be careful and drive it as a rear wheel drive car. You will be fine. Come back and post some pics if you get it.
#3
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Thanks for the reply. I live in the far burbs of Chicago and they rarely plow so at times I'm trekking through a foot of snow. Can you give me an idea of how the TC works? Does it control the power distribution to the wheels (rear only)? Does anything happen to the front wheels, etc?
Thanks again....
P.S. I really miss my 2000 XJR, but never tested it in winter....
Thanks again....
P.S. I really miss my 2000 XJR, but never tested it in winter....
#4
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Sorry if this is about to make your brain fry, but I don't think you will get a more complete answer to that quetion.
Traction control works like this:
The anti-lock brake system (ABS) modulates brake pressure on each wheel independently to maintain vehicle stability during braking. The ABS continually monitors the rotational velocity of each wheel anytime the ignition switch is in the run position and determines if a tire is skidding when the brakes are applied. Only then does the ABS intervene to modulate the brake pressure to the skidding wheel. The modulation continues until the wheel rotates freely. The brake pressure is then restored and the modulate/restore cycle is repeated whenever skidding is detected. This cycle occurs at a rate of several times per second.
The ABS module is capable of detecting the following system conditions:
[ul][*]hydraulic valve failure[*]wheel speed sensor failure[*]ABS power relay short circuit[*]interconnect failures to the ABS sensors, power and ground to the ABS module[*]over/under voltage conditions [/ul]The ABS provides self-diagnostics and displays failure messages via the ABS indicator in the instrument cluster. Failure of the ABS module, for whatever reason, will not compromise the normal operation of the brake system.
The Dynamic Stability Control (DSC) system includes the:
[ul][*]anti-lock brake system.[*]yaw/lateral control.[*]full speed traction control. [/ul]The DSC system manages the braking system to enhance the driver control of the vehicle.
The DSC system continually monitors the steering wheel angle, master cylinder brake pressure, front and rear wheel speeds, vehicle yaw and lateral rate acceleration.
The yaw/lateral rate sensor supplies a signal to the DSC module, via a serial link, which monitors the vehicles rate of acceleration from its central axis in a sideways direction, and also the vehicles angular rotation around it's central axis.
The driver input parameters are continually monitored via the brake master cylinder dynamic stability control sensor, the brake pedal travel sensor and the steering wheel angle sensor.
DSC is enabled/disabled via the traction control ON/OFF switch.
Self-diagnosis of the DSC system is provided via the instrument cluster message centre.
Traction control is an additional function added to the ABS/DSC system. The vehicles driven wheels are continually monitored for wheel spin relative to the calculated reference speed and to each other. If wheel spin is detected, the traction control function intervenes independently of the driver, applying brake pressure to the slipping wheel and reducing the engine drive torque supply. Meanwhile, brake pressure is modulated by the traction control until traction is re-established. Traction control brake actuation is diminished above 40 km/h (25 mph). Above this speed traction control relies primarily on engine torque reduction.
Traction control is enabled/disabled via the traction control ON/OFF switch. When the switch is in the (OFF) position, the amber traction control warning lamp solidly illuminates within the instrument cluster message centre. The traction control is automatically activated when the ignition is switched on. Self-diagnosis of the traction control system is also provided via the instrument cluster message centre.
The traction control brake intervention is automatically disabled whenever the brakes exceed a temperature limit. The traction brake intervention will remain disabled until the brakes have cooled, irrespective of ignition switch position or ignition switch cycling.
Traction control works like this:
The anti-lock brake system (ABS) modulates brake pressure on each wheel independently to maintain vehicle stability during braking. The ABS continually monitors the rotational velocity of each wheel anytime the ignition switch is in the run position and determines if a tire is skidding when the brakes are applied. Only then does the ABS intervene to modulate the brake pressure to the skidding wheel. The modulation continues until the wheel rotates freely. The brake pressure is then restored and the modulate/restore cycle is repeated whenever skidding is detected. This cycle occurs at a rate of several times per second.
The ABS module is capable of detecting the following system conditions:
[ul][*]hydraulic valve failure[*]wheel speed sensor failure[*]ABS power relay short circuit[*]interconnect failures to the ABS sensors, power and ground to the ABS module[*]over/under voltage conditions [/ul]The ABS provides self-diagnostics and displays failure messages via the ABS indicator in the instrument cluster. Failure of the ABS module, for whatever reason, will not compromise the normal operation of the brake system.
The Dynamic Stability Control (DSC) system includes the:
[ul][*]anti-lock brake system.[*]yaw/lateral control.[*]full speed traction control. [/ul]The DSC system manages the braking system to enhance the driver control of the vehicle.
The DSC system continually monitors the steering wheel angle, master cylinder brake pressure, front and rear wheel speeds, vehicle yaw and lateral rate acceleration.
The yaw/lateral rate sensor supplies a signal to the DSC module, via a serial link, which monitors the vehicles rate of acceleration from its central axis in a sideways direction, and also the vehicles angular rotation around it's central axis.
The driver input parameters are continually monitored via the brake master cylinder dynamic stability control sensor, the brake pedal travel sensor and the steering wheel angle sensor.
DSC is enabled/disabled via the traction control ON/OFF switch.
Self-diagnosis of the DSC system is provided via the instrument cluster message centre.
Traction control is an additional function added to the ABS/DSC system. The vehicles driven wheels are continually monitored for wheel spin relative to the calculated reference speed and to each other. If wheel spin is detected, the traction control function intervenes independently of the driver, applying brake pressure to the slipping wheel and reducing the engine drive torque supply. Meanwhile, brake pressure is modulated by the traction control until traction is re-established. Traction control brake actuation is diminished above 40 km/h (25 mph). Above this speed traction control relies primarily on engine torque reduction.
Traction control is enabled/disabled via the traction control ON/OFF switch. When the switch is in the (OFF) position, the amber traction control warning lamp solidly illuminates within the instrument cluster message centre. The traction control is automatically activated when the ignition is switched on. Self-diagnosis of the traction control system is also provided via the instrument cluster message centre.
The traction control brake intervention is automatically disabled whenever the brakes exceed a temperature limit. The traction brake intervention will remain disabled until the brakes have cooled, irrespective of ignition switch position or ignition switch cycling.
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