Member Since: 23 Sep 2005
Location: Pasadena, CA
Posts: 944
A skeptic, huh? You can't see the harness connector in those diagrams, but in addition to performing pedestrian motor duties to engage and release the parking brake, the EPB module also contains a circuit board connected through hard wires, high speed and low speed CAN busses to the rest of the electronic modules in the car:
Here is the guts of the EPB module:
1 Electrical connector
2 Housing
3 Electric motor
4 Printed Circuit Board
5 Spline shaft
6 Gearbox
7 Force sensor
Parking Brake Control diagram
Note:
A = Hardwired connection; D = High speed CAN (controller area network) bus; N = Medium speed CAN (controller area network) bus
Click image to enlarge
1 Battery
2 Fusible link 11E, BJB (battery junction box)
3 Fusible link 8E, BJB (battery junction box)
4 Air suspension control module
5 Diagnostic socket
6 Instrument cluster
7 Integrated head unit
8 Parking brake module
9 ATC (automatic temperature control) module
10 TPM (tire pressure monitoring) module
11 Parking aid module
12 CJB (central junction box)
13 Transfer box control module
14 ECM (engine control module)
15 Rear differential control module
16 ABS (anti-lock brake system) module
17 TCM (transmission control module)
18 Restraints control module
19 Parking brake switch
20 Fuse 41P, CJB (central junction box) (ignition)
21 Ignition switch
22 Fuse 40P, CJB (central junction box) (key-in)
How the radio and the aircon got in the picture, I have no idea... But it's no wonder it takes a computer to troubleshoot just about anything in cars these days.
Wed Feb 04 2009 5:25am
ViewWise
Member Since: 13 Mar 2008
Location: London
Posts: 704
I always put the car into neutral, then apply the handbrake. Then come off the brakes to allow the handbrake to take the strain of the car. Then put it in park. I figured id rather the handbrake shoes wear out than a gearbox!
Not sure if this method is actually helping but its pretty much second nature to me now in all autos i drive. I find the car comes in and out of park much smoother aswell.WINNER - 2008 Best All New Photograph WINNER - 2009 Best All New Photograph
Wed Feb 04 2009 6:44am
Tim in Scotland
Member Since: 30 May 2005
Location: Driving along in my automobile
Posts: 17476
Umbertos lovely pictures at least resolve what the EPB acts on even if we cannot solve why the Radio and Aircon are involved in the EPB! Maybe the radio automatically mutes so you can concentrate on the job in hand in an emergency and not be distracted by loud music and the aircon will automatically crank to maximum cooling to chill your sweaty brow after the "brown trousers" event, all triggered if you pull on the EPB above walking pace . 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
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Wed Feb 04 2009 5:25am
You can't see the harness connector in those diagrams, but in addition to performing pedestrian motor duties to engage and release the parking brake, the EPB module also contains a circuit board connected through hard wires, high speed and low speed CAN busses to the rest of the electronic modules in the car:
But it's no wonder it takes a computer to troubleshoot just about anything in cars these days.
