Hydroaggregate Press. Release - BMW 745i Repair Instructions

BMW '7' series cars
09 ABS
I
Hydroaggregate press. release
ABS control unit No.
0265100002
Volt.betw.leads 1 + 10
Front left
>
10.8V
Display on brake dynamometer (BPS):
see test sequence
4.2000 N (both wheels); diff. between
wheels
<
400 N
right
left/right 3s
Rear wheels 750 N ... 1300 N
5. Displayed 'reading drops: Front
wheels avant:
450 N ... 1000 N
I
Rear left
-
With pedal force unchanged, the bra·
ke dynamometer (BPS) display must
not change by more than 150 N
within 3 s.
right
left/right
3s
Test 1. Switch off ign. Connections needed: T·plug at ABS wiring harness and at ABS control u-1lit
sequence: 2. Rear axle on brake dynamometer (BPS) and flashing • on tester for REAR LlR with
[!]
3. Switch on ignition; note voltage between leads 1 and 10 if necessary, run engine at idle
speed). Switch on brake dynamometer for both wheels
4. Apply brakes until BPS reading is 2000 N (left and right), and maintain this pedal force
steadily _
5. Press
~.
After 2 s, the pump (RFP) is started, the valve opened briefly and brought to
the main phase, and the's' display starts to run. When 3 s are displayed: press
~
; end
of measurement.
6. To repeat, press ~ ; to move on to next wheel, press
[!] .
Test positions: REAR LlR, I
FRONT LlR in any desired order.
II nominal values are not reached: check battery, perform test steps
05·06/07 ,
check hydro·aggregate
Further inlormation on workshop manual microfiche, Group 34, job No. 3451 520; Troubleshooting - ABS