 |
 |
Test scope |
Test connection
|
Test condition |
Nominal value |
Possible cause/Remedy |
| 1.0 |
  
 |
ESP control
module (N47-5)
Circuit 30
Voltage supply from fuse and relay box (F1)
|
57  (2.23)
57 (2.23) |
|
 58
(2.24)
82
(2.48)
|
Ignition: OFF
With DTC (excessive voltage) repeat the test with engine running.
|
11 - 14 V
11 - 14 V |
Values < 11 V:
Wiring,
fuse f27 in F1 (fuse and relay box).
Values >14 V:
check generator (G1). |
| 1.1 |
|
Voltage supply for circuit 15 from fuse and relay box (F1).
|
57
(2.23)
81
(2.47)
|
|
14
(1.14)
14
(1.14) |
Ignition: ON |
11 - 14 V
11 - 14 V |
Wiring,
Fuse f22 in F1 (fuse and relay box).
|
| 2.0 |
|
Diagnostic output
(ESP control module) (N47-5) |
57
(2.23) |
N47-5
 |
13
(1.13)
|
Ignition: ON |
10 - 14 V
|
Wiring,
ESP control module (N47-5).
|
| 3.0 |
 |
High-pressure/return
pump (F1k25)
Voltage supply for circuit 30 from F1 (fuse and relay box) |
|
F1k25
|
3 |
Ignition: OFF
Fuse F1k25 removed
|
11 - 14 V
|
F1 (fuse and relay box)
|
| 3.1 |
|
Coil resistance |
46
(2.12) |
N47-5
|
47
(2.13) |
Ignition: OFF
Disconnect ESP control module (N47-5).
Fuse f1k25 connected. |
40 - 80  |
Wiring,
F1k25,
F1 (fuse and relay box). |
| 3.2 |
|
Control circuit voltage supply of F1k25 relay from N47-5
|
57
(2.23) |
N47-5
|
47
(2.13) |
Connect ESP control module (N47-5).
Ignition: ON
|
11 - 14 |
ESP control module (N47-5). |
| 4.0 |
|
Steering angle
sensor (N49)
Voltage supply circuit 30 from F1 (fuse and relay box)
|
2
|
N49
|
1
|
Ignition: OFF
Disconnect connector from N49 |
11 - 14 V
|
Fuse f13 at F1
Wiring,
F1 |
| 4.1 |
|
Voltage supply circuit 15 from F1 (fuse and relay box)
|
2
|
N49
|
3
|
Ignition: ON |
11 - 14 V
|
Fuse f22 at F1
Wiring,
F1 |
| 5.0 |
  |
ESP stop lamp supression (F1k6) relay
Voltage supply circuit 30, from fuse and relay box (F1) for control circuit of F1k6 |
|
F1k6
|
1
|
Ignition: OFF
Measurement to be taken at socket for F1k6,
F1k6 removed. |
11 - 14 V
|
Fuse and relay box (F1). |
| 5.1 |
|
Signal from stop lamp switch (S9/1) (N.C.) |
|
F1k6
|
3
|
Ignition: ON
F1k6 removed,
press service brake. |
11 - 14 V
|
Wiring,
Stop lamp switch (S9/1) |
| 5.2 |
|
Signal from stop lamp switch (S9/1) (N.O.) |
57
(2.23) |
N47-5
|
11
(1.11)
|
Ignition: ON
F1k6 connected,
service brake not pressed
service brake pressed |
11 - 14 V
< 9 V
|
Wiring,
Stop lamp switch (S9/1) |
| 5.3 |
|
Signal from F1k6 for activation of the stop lamps
|
57
(2.23) |
N47-5
|
15
(1.15)
|
Ignition: ON
F1k6 connected,
Press service brake.
|
11 - 14 V
|
Wiring,
F1k6,
ESP control module (N47-5) |
| 6.0 |
   
 
 |
Stop lamp switch (S9/1)
Closed (N.C.) |
|
|
|
Service brake:
Not pressed:
Pressed:
|
 
 |
Wiring,
S9/1,
ESP stop lamp supression relay (F1k6),
ESP control module (N47-5).
|
| 6.1 |
|
Open (N.O.) |
|
|
|
Service brake:
Not pressed:
Pressed:
|
|
Wiring,
S9/1 |
| 7.0 |
|
Parking brake switch (S12) |
|
|
|
Engine: at idle
Press parking brake pedal:
Parking brake pedal not pressed: |
Parking brake warning lamp (A1e7): ON
(A1e7): OFF
|
Wiring,
S12,
A1e7
|
| 8.0 |
|
ESP OFF switch (S76/6) |
|
|
|
S76/6 in position: ON
Held pressed:
At rest:
S76/6 in position: OFF
Held pressed:
|
   
>
< |
Wiring,
S76/6,
ESP control module (N47-5) |
| 9.0 |
|
Left front axle VSS
sensor (L6/1)
Internal resistance
|
77
(2.43) |
N47-5
|
78
(2.44) |
Ignition: OFF
Disconnect ESPcontrol module (N47-5). |
0.8 - 2.3 k |
Wiring
L6/1
|
| 9.1 |
|
Insulation resistance |
57
(2.23) |
N47-5
|
77
(2.43) |
Ignition: OFF
Disconnect (N47-5)
|
> 20 k |
Wiring,
L6/1
|
| 10.0 |
|
Right front axle VSS
sensor (L6/2)
Internal resistance |
52
(2.18) |
N47-5
|
51
(2.17)
|
Ignition: OFF
Disconnect (N47-5)
|
0.8 - 2.3 k |
Wiring,
L6/2
|
| 10.1 |
|
Insulation resistance |
57
(2.23) |
N47-5
|
52
(2.18) |
Ignition: OFF
Disconnect (N47-5)
|
> 20 k |
Wiring,
L6/2
|
| 11.0 |
|
Left rear axle VSS
sensor (L6/3)
Internal resistance |
26
(1.26) |
N47-5
|
25
(1.25)
|
Ignition: OFF
Disconnect (N47-5)
|
0.6 - 1.8 k |
Wiring,
L6/3
|
| 11.1 |
|
Insulation resistance |
57
(2.23) |
N47-5
|
26
(1.26) |
Ignition: OFF
Disconnect (N47-5)
|
> 20 k |
Wiring,
L6/3
|
| 12.0 |
|
Right rear axle VSS
sensor (L6/4)
Internal resistance |
28
(1.28) |
N47-5
|
27
(1.27)
|
Ignition: OFF
Disconnect ESP control module (N47-5). |
0.6 - 1.8 k
|
Wiring,
L6/4
|
| 12.1 |
|
Insulation resistance |
57
(2.23) |
N47-5
|
28
(1.28)
|
Ignition: OFF
Disconnect (N47-5).
|
> 20 k |
Wiring,
L6/4
|
| 13.0 |
|
ASR/ETS/ESP hydraulic
unit (A7/3) (Traction systems)
Solenoid valve voltage supply from N47-5
|
57
(2.23) |
N47-5
|
80
(2.46)
|
Ignition: OFF |
11 - 14 V |
Wiring,
ESP control module (N47-5). |
| 14.0 |
|
Left front axle solenoid valve (hold) (A7/3y6)
Internal resistance
|
80
(2.46)
|
N47-5
|
73
(2.39) |
Ignition: OFF
Disconnect (N47-5).
|
5.4 - 12.6 |
Wiring,
A7/3
|
| 15.0 |
|
ASR/ETS hydraulic unit, left front axle solenoid valve (release) (A7/3y7)
Internal resistance
|
80
(2.46)
|
N47-5
|
72
(2.38) |
Ignition: OFF
Disconnect (N47-5).
|
2.8 - 6.6 |
Wiring,
A7/3
|
| 16.0 |
|
Right front axle solenoid valve (hold) (A7/3y8)
Internal resistance
|
80
(2.46)
|
N47-5
|
74
(2.40) |
Ignition: OFF
Disconnect (N47-5).
|
5.4 - 12.6 |
Wiring,
A7/3
|
| 17.0 |
|
Right front axle solenoid valve (release) (A7/3y9)
Internal resistance
|
80
(2.46)
|
N47-5
|
71
(2.37) |
Ignition: OFF
Disconnect (N47-5).
|
2.8 - 6.6 |
Wiring,
A7/3
|
| 18.0 |
|
Left rear axle solenoid valve (hold) (A7/3y10)
Internal resistance |
80
(2.46)
|
N47-5
|
69
(2.35) |
Ignition: OFF
Disconnect (N47-5). |
5.4 - 12.6 |
Wiring,
A7/3
|
| 19.0 |
|
Left rear axle solenoid valve (release) (A7/3y11)
Internal resistance
|
80
(2.46)
|
N47-5
|
70
(2.36) |
Ignition: OFF
Disconnect (N47-5). |
2.8 - 6.6 |
Wiring,
A7/3
|
| 20.0 |
 |
Right rear axle solenoid valve (hold) (A7/3y12)
Internal resistance
|
80
(2.46)
|
N47-5
|
64
(2.30) |
Ignition: OFF
Disconnect (N47-5). |
5.4 - 12.6 |
Wiring,
A7/3
|
| 21.0 |
|
Right rear axle solenoid valve (release) (A7/3y13)
Internal resistance
|
80
(2.46)
|
N47-5
|
65
(2.31) |
Ignition: OFF
Disconnect (N47-5). |
2.8 - 6.6 |
Wiring,
A7/3
|
| 22.0 |
|
Pressure circuit 1 vacuum solenoid valve (A7/3y26)
Internal resistance |
80
(2.46) |
N47-5
|
61
(2.27)
|
Ignition: OFF
Disconnect (N47-5). |
2.8 - 6.6 |
Wiring,
A7/3
|
| 23.0 |
 |
Pressure circuit 2 vacuum solenoid valve (A7/3y27)
Internal resistance |
80
(2.46) |
N47-5
|
63
(2.29)
|
Ignition: OFF
Disconnect (N47-5). |
2.8 - 6.6 |
Wiring,
A7/3
|
| 24.0 |
|
Pressure circuit 1 switchover solenoid
valve (A7/3y24)
Internal resistance |
80
(2.46) |
N47-5
|
60
(2.26)
|
Ignition: OFF
Disconnect (N47-5). |
5.4 - 12.6 |
Wiring,
A7/3
|
| 25.0 |
|
Pressure circuit 2 switchover solenoid
valve (A7/3y25)
Internal resistance |
80
(2.46) |
N47-5
|
62
(2.28)
|
Ignition: OFF
Disconnect (N47-5). |
5.4 - 12.6 |
Wiring,
A7/3
|
| 26.0 |
|
ABS lateral acceleration sensor (B43)
Supply voltage from N47-5
|
24
(1.24)
|
N47-5
|
22
(1.22) |
Ignition: ON |
4.75 - 5.25 V |
Wiring,
B43,
N47-5
|
| 27.0 |
|
ESP brake pressure
sensor 1 (B34/1)
Supply voltage from N47-5 |
48
(2.14) |
N47-5
|
50
(2.16)
|
Ignition: ON |
4.75 - 5.25 V |
Wiring,
B34/1,
N47-5
|
| 27.1 |
|
ESP brake pressure
sensor 2 (B34/2)
Supply voltage from N47-5 |
42
(2.8) |
N47-5
|
44
(2.10)
|
Ignition: ON |
4.75 - 5.25 V |
Wiring,
B34/2,
N47-5
|
| 28.0 |
|
Rotating speed sensor for ESP (B45)
Supply voltage from N47-5
|
17
(1.17) |
N47-5
|
18
(1.18)
|
Ignition: ON |
4.75 - 5.25 V |
Wiring,
B45,
N47-5
|
| 29.0 |
|
Membrane travel sensor (BAS) (A7/7b1)
Supply voltage from N47-5 |
35
(2.1) |
N47-5
|
37
(2.3)
|
Ignition: ON |
4.75 - 5.25 V |
Wiring,
A7/7b1,
N47-5
|
| 30.0 |
|
Solenoid valve
(BAS) (B43)
Resistance
|
56
(2.22)
|
N47-5
|
55
(2.21) |
Ignition: OFF
Disconnect (N47-5). |
1 - 2 |
Wiring,
A7/7
|
| 31.0 |
|
CAN data line
Resistance |
34
(3.L) |
N47-5
|
33
(3.H)
|
Ignition: OFF |
55 - 66 |
Wiring,
31.1
31.2 |
| 31.1 |
|
CAN element in instrument cluster (A1)
Resistance |
10
(B.10) |
A1
|
9
(B.9)
|
Disconnect connector B at A1 and check directly at control module. |
115 - 125 |
A1 |
| 31.2 |
|
CAN element in engine control
module (ME-SFI) (N3/10)
Resistance
|
11
(D.11) |
N3/10
|
12
(D.12)
|
Ignition: ON
Disconnect connector D at N3/10 and check directly at control module. |
115 - 125 |
N3/10,
See D.M., Engines, Vol. 4, section 9.4
|
Printable version
