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Parking brake fault

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Old 06-13-2018, 05:20 AM
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Default Parking brake fault

i have a parking brake fault error message showing on the dash and I have tried resetting the parking brake to no avail. I have used SDD to read the codes and originally it was showing just one code C1799. But now, having cleared to code a few times and it coming back again, it now appears that there is no code! The parking brake model passes the test with no DTCs at all even though the parking brake still doesn’t work (it shows a message “parking brake fault” in orange with the orange brake warning light when stationary and “Cannot Apply Parking Brake” in red with the flashing red brake warning light and orange brake warning light when the vehicle is in motion. Operating the parking brake switch does nothing. So it appears that there is definitely a fault but there is no DTC recorded! Any ideas? Thanks.
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Old 06-13-2018, 08:01 AM
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I would try disconnecting the battery, and then doing the parking brake reset.
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Old 06-13-2018, 08:20 AM
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Quote:
Originally Posted by Bigg Will View Post
I would try disconnecting the battery, and then doing the parking brake reset.
Thanks for your suggestion, but you must have missed the bit in my post that says “and I have tried resetting the parking brake to no avail” 😊
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Old 06-13-2018, 02:06 PM
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Originally Posted by Colin21958 View Post


Thanks for your suggestion, but you must have missed the bit in my post that says “and I have tried resetting the parking brake to no avail” 😊
I just saw you reset it, I didn't know if it was a reset at the faults request, or due to your doing a battery disconnect.
Well the manual says there are 2 micro switches 1 for apply and 1 for release, and a hall effect sensor "inside the actuator" to ensure a full release of the brakes. The good thing is the Jag can tell you if and, which switch or sensor is bad, but you need a higher level (Dealer level) scanner to see that info. You could try an independent brake specialist. The higher lever scanner I use just came out with their XF parking brake diagnostic program for $50, guess I'll be getting it.
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Old 06-13-2018, 03:54 PM
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Originally Posted by Bigg Will View Post
I just saw you reset it, I didn't know if it was a reset at the faults request, or due to your doing a battery disconnect.
Well the manual says there are 2 micro switches 1 for apply and 1 for release, and a hall effect sensor "inside the actuator" to ensure a full release of the brakes. The good thing is the Jag can tell you if and, which switch or sensor is bad, but you need a higher level (Dealer level) scanner to see that info. You could try an independent brake specialist. The higher lever scanner I use just came out with their XF parking brake diagnostic program for $50, guess I'll be getting it.
when it was showing a code read through SDD it was C1799 (Hall Effect Sendor Circuit Fault). But now it’s not showing any code at all, even though the fault still exists!
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