Ground/Overvtg./Bite - BMW 745i Repair Instructions

Ul
Ul
)
I I
BMW
'7'
series cars
05
ABS
I
Ground/overvtg.lbite
Voltage betw. leads 1 and 10
Ground pin 10
(voltage drop)
I •
Ground pin 20
(voltage drop)
Ground pin 34
(voltage drop)
R FP (return pump) pin 14/gnd.
(voltage drop)
Overvoltage protect.
(voltage betw. leads 1 and 10)
Test cycle
Failure sim.
ABS control unit No.
0265100002
>
10.8 V
+
0.7 V '
+
0.7 V
+ 0.7
V
+ 0.7 V
16 ... 26 V
passed ,
passed
Test
1. Connections needed: T·plug at ABS harness and ABS control unit
sequence: 2. Switch on ignition; ABS telltale lam
p must come on
3. Note voltage between leads 1 and 10
4. After OVERVOl T AGE PROTECT. test, ABS telltale lamp must go out briefly
5. After this (FAll' U RE SIM.) the ASS telltale lamp must come on again
II nominal values are not reached : check battery, ground connections
Further information on workshop manual microfiche, Group 34, job No. 34 52 510, Troubleshooting - ABS