Replies Archived Message
Posted by Steve Norman on January 10, 2005, 9:39 am, in reply to "Landrover Freelander Hill decent fault. Year 2000"
Hi Peter,
Is the warning light green, or is it amber with an exclamation mark.
Amber is a fault, green is the system switched on (flashing if inoperative, due to 1st or rev not selected, clutch pressed etc etc), on all the time when operating.I seem to remember the wiring to the HDC switch on the gearlever shorting, causing the system to remain on. Worth a check. Also, if the brake light relay or switch is on, the throttle pressed/switch seen to be open, gear selector position incorrect gear etc, system will disable.
Look at the live data to see these are all OK. Exactly which lights are on & colour? & when?
Is it ABS, HDC & TC, or just HDC, when is it on?
Does it go off at all? solid or flashing. Let me know & we can explore some more.
As for knowing when the brakes are overheating:
To prevent the brakes overheating, the ABS ECU
monitors the amount of active braking employed
and, from this, calculates brake temperature. If the
ABS ECU determines brake temperature has
exceeded a preset limit, it extinguishes the HDC
information warning lamp and flashes the HDC fault
warning lamp to indicate that HDC should be
deselected. If active braking continues and the ABS
ECU determines that brake temperature has
increased a further 50 °C, it fades out active braking
and disables HDC. After fade out, the HDC fault
warning lamp continues to flash, while HDC is
selected, until the ABS ECU calculates brake
temperature to be at an acceptable level. This
calculation continues even if the ignition is turned
off, so turning the ignition off and back on will not
reduce the disabled time. When the ABS ECU
calculates the brake temperature to be acceptable, it
extinguishes the HDC fault warning lamp and
illuminates the HDC information warning lamp to
indicate HDC is available again. The disabled time is
dependant on vehicle speed; typical times at
constant vehicle speeds are as follows:
Typical brake overheat disabled times
Vehicle speed, mph (kph) Time, minutes
1.3 (2) 40
12.5 (20) 33
15.6 (25) 17
25 (40) 9
31.3 (50) 6
Regards
Steve
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| Message Thread:
- Landrover Freelander 2000 - Hill decent fault, lamp stays on - Peter Holland January 10, 2005, 8:31 am
- Replies - Steve Norman January 10, 2005, 9:39 am
- Replies - Peter Holland January 10, 2005, 5:54 pm
- Replies - Steve Norman January 11, 2005, 6:20 am
- Replies - Peter Holland January 11, 2005, 4:39 pm
- Replies - Derek Warwick January 11, 2005, 9:39 pm
- Replies - Steve Norman January 12, 2005, 6:20 am
- Replies - Peter Holland January 12, 2005, 7:44 pm
- Replies - Steve Norman January 12, 2005, 9:29 pm
- Replies - Andrew west January 12, 2005, 11:25 pm
- Replies - Peter Holland January 13, 2005, 7:52 am
- Replies - Andrew west January 13, 2005, 10:22 am
- Replies - Steve Norman January 13, 2005, 10:49 am
- Replies - andy evans January 13, 2005, 8:12 am
- Replies - Peter Holland January 13, 2005, 6:51 pm
- Replies - Andrew west January 13, 2005, 7:49 pm
- Fixed - Peter Holland January 18, 2005, 7:58 pm
- Fixed - Steve Norman January 18, 2005, 8:42 pm
- Fixed - Andrew west January 18, 2005, 10:42 pm
- Replies - Peter Holland January 19, 2005, 7:59 am
- Replies - James Dillon January 21, 2005, 5:01 pm
- Replies - Andrew Walch January 22, 2005, 6:25 am
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