 |
 1) |
Test scope |
Test connection |
Test condition |
Nominal value |
Possible cause/Remedy |
| 1.0 |
 |
Overvoltage protection relay module 87E,
7-pole (K1/1) |
-
|
|
|
Ignition: OFF
|
LED
All: OFF |
Wiring,
Overvoltage protection relay
module (K1/1) (Figure 1).
|
| 2.0 |
|
Solenoid valve
relay (A7/3k1) |
-
|
|
|
Ignition: OFF
|
LED
All: OFF
|
Wiring,
Solenoid valve relay (A7/3k1), (Figure 2).
|
| 3.0 |
|
Overvoltage protection relay module (87E, 7-pole) |
Connect to
|
|
|
Ignition: ON
Note: Select DC Volts range |
11 - 14 V
LED
 : ON
 : ON
Malfunction indicator lamp
ABS: ON
ASR: ON
|
Wiring,
Battery charge,
Fuse for overvoltage protection relay module (K1/1).
Wiring,
Overvoltage protection relay module (K1/1),
Solenoid valve relay (A7/3k1),
ABS malfunction indicator
lamp (A1e17),
ASR malfunction indicator
lamp (A1e22), |
| 4.0 |
|
ASR function indicator lamp
(A1e21) |
-
|
|
|
Ignition: ON
|
ASR function indicator
lamp: ON |
Wiring,
ASR function indicator
lamp (A1e21). |
| 5.0 |
|
Circuit 61 |
- |
|
|
Start engine |
LED
: OFF |
Wiring,
Generator (G2).
|
| 6.0 |
|
Stop lamp
switch (S9/1) |
-
|
|
|
Ignition: ON
Depress brake pedal
|
LED
 : ON |
Wiring,
Solenoid valve relay (A7/3k1),
(Figure 2),
Stop lamp switch (S9/1).
|
| 7.0 |
 |
Solenoid valve
relay (A7/3k1) |
Connect to
|
|
|
Ignition: ON |
11 - 14 V
LED
: ON
: ON
 : ON
Malfunction indicator lamp
ABS: OFF
ASR: OFF
|
Wiring,
Battery charge,
Fuse for overvoltage protection relay module (K1/1).
Wiring,
Overvoltage protection relay module (K1/1),
Solenoid valve relay (A7/3k1),
ABS malfunction indicator
lamp (A1e17),
ASR malfunction indicator
lamp (A1e22).
|
| 8.0 |
|
ASR charging pump (M15)
Voltage supply |
|
|
|
Ignition: ON
|
11 - 14 V
|
Wiring. |
| 9.0 |
 |
Solenoid valve
relay (A7/3k1),
Diode L1 |
Connect to |
|
|
Ignition: ON |
0.4 - 1.5 V
LED
: ON
: ON
|
Wiring,
Solenoid valve relay (A7/3k1).
|
| 10.0 |
|
Solenoid valve
relay (A7/3k1),
Diode L2
|
20  |
|
 17 |
Ignition: ON |
0.4 - 1.5 V |
Wiring,
Solenoid valve relay (A7/3k1).
|
| 11.0 |
 |
Left front axle vehicle speed sensor (L6/1)
Internal resistance |
Connect to
|
|
|
Ignition: ON
|
1.1 - 2.3 k 
|
Wiring,
Left front axle vehicle speed sensor (L6/1).
|
| 12.0 |
|
Left front vehicle
speed sensor (L6/1)
Insulation resistance |
Connect to
|
|
|
Ignition: ON
Press button: 
|
> 20 k
|
Left front axle vehicle speed sensor (L6/1).
|
| 13.0 |
 |
Right front axle vehicle
speed sensor (L6/2)
Internal resistance |
Connect to
|
|
|
Ignition: ON
|
1.1 - 2.3 k
|
Wiring,
Right front axle vehicle speed sensor (L6/2).
|
| 14.0 |
|
Right front axle vehicle
speed sensor (L6/2)
Insulation resistance |
Connect to
|
|
|
Ignition: ON
Press button:
|
> 20 k
|
Right front vehicle speed
sensor (L6/2). |
| 15.0 |
 |
Left rear axle vehicle
speed sensor (L6/3)
Internal resistance |
Connect to
|
|
|
Ignition: ON
|
0.6 - 1.6 k
|
Wiring,
Left rear axle vehicle speed sensor (L6/3). |
| 16.0 |
|
Left rear axle vehicle speed sensor (L6/3)
Insulation resistance |
Connect to
|
|
|
Ignition: ON
Press button:
|
> 20 k
|
Left rear axle vehicle speed sensor (L6/3).
|
| 17.0 |
 |
Right rear axle vehicle speed sensor (L6/4)
Internal resisitance |
Connect to
|
|
|
Ignition: ON
|
0.6 - 1.6 k
|
Wiring,
Right rear axle vehicle speed sensor (L6/4).
|
| 18.0 |
|
Right rear axle vehicle speed sensor (L6/4)
Insulation resistance |
Connect to
|
|
|
Ignition: ON
Press button:
|
> 20 k
|
Right rear axle vehicle speed sensor (L6/4).
|
| 19.0 |
 |
Left front axle solenoid
valve (A7/3y1)
Internal resistance |
Connect to
|
|
|
Ignition: OFF
Press button:
|
4 - 6
|
Wiring,
ABS/ASR hydraulic unit (A7/3),
(Figure 3). |
| 20.0 |
 |
Right front axle solenoid valve(A7/3y2)
Internal resistance |
Connect to
|
|
|
Ignition: OFF
Press button:
|
4 - 6
|
Wiring,
ABS/ASR hydraulic unit (A7/3),
(Figure 3). |
| 21.0 |
 |
Left rear axle solenoid
valve (A7/3y3)
Internal resistance |
Connect to
|
|
|
Ignition: OFF
Press button: |
4 - 6
|
Wiring,
ABS/ASR hydraulic unit (A7/3),
(Figure 3). |
| 22.0 |
|
Right rear axle solenoid
valve (A7/3y4)
Internal resistance |
Connect to
|
|
|
Ignition: OFF
Press button:
|
4 - 6
|
Wiring,
ABS/ASR hydraulic unit (A7/3),
(Figure 3). |
| 23.0 |
|
Left front axle vehicle speed sensor (L6/1)
Voltage |
Connect to
|
|
|
Raise vehicle
Ignition: ON
Turn wheel at approximately one revolution/second. |
 0.1V~
|
Excessive wheel bearing play, open circuit or wires connected incorrectly,
Left front axle vehicle speed sensor (L6/1).
|
| 24.0 |
|
Left front axle solenoid valve (A7/3y1)
Pressure retention |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Turn wheel at approximately one revolution/second.
Press switch: "P="
Apply brake pedal.
|
LED
: ON
: ON
: ON
: ON
Wheel must be able to rotate. |
Brake lines on hydraulic unit reversed (Figure 3),
Wires reversed,
ABS/ASR hydraulic unit (A7/3).
|
| 25.0 |
|
Left front axle solenoid
valve (A7/3y1)
Pressure reduction |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Apply brake pedal.
Press switch: "P "
Turn wheel at approximately one revolution/second. |
LED
: ON
: ON
: ON
 : ON
: ON
Wheel must be able to rotate.
|
Return pressure pump
relay (A7/3k2),
ABS/ASR hydraulic unit (A7/3)
|
| 26.0 |
|
Right front axle vehicle speed sensor (L6/2) |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Turn wheel at approximately one revolution/second.
|
0.1V~
|
Excessive wheel bearing play, open circuit or wires connected incorrectly,
Right front axle vehicle speed sensor (L6/2). |
| 27.0 |
|
Right front axle solenoid valve (A7/3y2) |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Turn wheel at approximately one revolution/second.
Press switch: "P="
apply brake pedal. |
LED
: ON
: ON
: ON
: ON
Wheel must be able to rotate.
|
Brake lines on hydraulic unit reversed (Figure 3),
Wires reversed,
ABS/ASR hydraulic unit (A7/3).
|
| 28.0 |
|
Right front axle solenoid valve (A7/3y2) |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Apply brake pedal.
Press switch: "P"
Turn wheel at approximately one revolution/second.
|
LED
: ON
: ON
: ON
: ON
: ON
Wheel must be able to rotate.
|
Return/pressure pump
relay (A7/3k2) (Figure 2),
ABS/ASR hydraulic unit (A7/3).
|
| 29.0 |
|
Left rear axle vehicle speed sensor (L6/3)
Voltage |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Turn wheel at approximately one revolution/second.
|
0.1V~
|
Open circuit or wires connected incorrectly,
left rear axle vehicle speed
sensor (L6/3).
|
| 30.0 |
|
Left rear axle solenoid
valve (A7/3y3) |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Turn wheel at approximately one revolution/second.
Press switch: "P="
apply brake pedal.
|
LED
: ON
: ON
: ON
: ON
Wheel must be able to rotate. |
Brake lines on hydraulic unit reversed (Figure 3),
Wires reversed,
ABS/ASR hydraulic unit (A7/3).
|
| 31.0 |
|
Left rear axle solenoid
valve (A7/3y3) |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Apply brake pedal.
Press switch: "P"
Turn wheel at approximately one revolution/second.
|
LED
: ON
: ON
: ON
: ON
: ON
Wheel must be able to rotate.
|
Return/pressure pump
relay (A7/3k2) (Figure 2),
ABS/ASR hydraulic unit (A7/3).
|
| 32.0 |
|
Right rear axle vehicle speed sensor (L6/4) |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Turn wheel at approximately one revolution/second.
|
0.1V~
|
Open circuit or wires connected incorrectly,
left rear axle vehicle speed
sensor (L6/4).
|
| 33.0 |
|
Right rear axle solenoid valve (A7/3y4) |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Turn wheel at approximately one revolution/second.
Press switch: "P="
apply brake pedal.
|
LED
: ON
: ON
: ON
: ON
Wheel must be able to rotate. |
Brake lines on hydraulic unit reversed (Figure 3),
Wires reversed,
ABS/ASR hydraulic unit (A7/3). |
| 34.0 |
|
Right rear axle vehicle speed sensor (A7/3y4) |
remains connected
|
|
|
Vehicle raised
Ignition: ON
Apply brake pedal.
Press switch: "P"
Turn wheel at approximately one revolution/second. |
LED
: ON
: ON
: ON
: ON
: ON
Wheel must be able to rotate.
|
Return/pressure pump relay (A7/3k2) (Figure 2),
ABS/ASR hydraulic unit (A7/3). |
| 35.0 |
|
Switchover/solenoid
valve (A7/3y5) |
32 |
|
30
|
Ignition: OFF |
2 - 4 |
Wiring,
ABS/ASR hydraulic unit (A7/3). |
| 36.0 |
|
Snow chain switch (ASR)
with indicator (S76) |
20
|
|
3
|
Ignition: ON
|
Function indicator in S76 comes on.
|
Wiring,
Snow chain switch (ASR) with indicator (S76). |
| 37.0 |
|
Snow chain switch (ASR)
with indicator (S76) |
20
|
|
5
|
Ignition: ON
Operate switch (S76) on and off
|
ON: < 1 V
OFF: 11 - 14 V
|
Wiring,
Snow chain switch (ASR) with indicator (S76). |
| 38.0 |
|
Pressure switch (A7/3s1) |
20
|
|
8
|
Ignition: ON
Briefly open (maximum 2 seconds) bleed connection "SP" (Figure 3) on hydraulic unit (A7/3) according to work instructions.
|
0 V
(Pressure reservoir full)
11 - 14 V
(Signal to pressurize). |
Wiring,
ABS/ASR hydraulic unit (A7/3).
|
| 39.0 |
|
ASR charging pump (M15), return/pressure pump motor (A7/3m1) |
Connect to
33 |
|
34
|
Ignition: ON
Press switch:"P "
(maximum of 60 seconds)
|
11 - 14 V to
0 V
Pumps can be heard running (running time approximately 40 seconds until pressure reservoir is full).
|
Wiring,
ABS/ASR hydraulic unit (A7/3),
 33.
|
Printable version
