P38A Disc handbrake conversion

Datatek said:

I don't know if JLR EPB's are the same, but on the Citroen, the EPB operates automatically when the car comes to a halt and releases when the accelerator pedal is pressed, unless you are unlucky and it decides it will not release.
You only need a component failure that can drive the motor and the EPB will operate regardless of speed.
I wonder how it can comply with the construction and use regs that require the parking brake to act as an emergency brake if it cannot be applied above xxmph?
I understand the difference between the location of the brakes on the P38 and the L322.

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RangeRoller dt said:

what you like about it enough to keep it for your new one Kev??

Here’s a guy ^^ knows his anchors lol

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marjon said:

There are ways to emergency release.
As for construction and use reg, well they obviously passed.

Below taken from manual.


Dynamic Apply
In the dynamic apply mode, if the vehicle speed is more than 10 km/h (6.25 mph) when the parking brake switch is selected to apply, the parking brake module requests the ABS module to activate the disc brakes on all four wheels. When the vehicle comes to a standstill, the parking brake module statically applies the parking brake. Once the static load is achieved, the hydraulic pressure is removed. If the parking brake switch is released to the neutral position, or pressed down to the release position, during dynamic apply, braking is cancelled.
The ABS module monitors the deceleration rate using the wheel speed sensor signals, and adjusts the hydraulic pressure to the disc brakes as required to achieve the required rate. All of the anti-lock control - traction control system brake functions remain enabled in the dynamic apply mode.
The parking brake module incorporates two fallback functions for the dynamic apply mode:
 Fallback 1 is invoked if vehicle speed is between 2.5 km/h (1.25 mph) and Vmax when the parking brake switch is selected to apply and the ABS module is unable to fulfil a hydraulic request. When fallback 1 is invoked, the parking brake module decelerates the vehicle using only the parking brake. The parking brake module monitors the deceleration rate using the wheel speed information from the ABS module, and adjusts the tension of the brake cables to achieve the required rate. During deceleration the parking brake module also uses the wheel speed inputs from the ABS module to operate an anti-lock function for the rear wheels. When vehicle speed decreases to 2.5 km/h (1.25 mph) the parking brake module changes to the static apply mode.
 Fallback 2 is invoked if the ABS module fails. In this instance the parking brake module monitors the output shaft speed sensor on the transmission to determine if a static or dynamic condition exists.
 Fallback 3 is invoked if there is a loss of communication between the parking brake module and the CAN bus has failed. When fallback 3 is invoked, the parking brake module decelerates the vehicle using only the parking brake. The parking brake module tightens the brake cables under the control of the driver, no anti-lock function is available.


J

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Datatek said:

What a lot of complication to replace a brain and a hand operated brake
And when the CAN bus fails, what happens then?

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