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Diagnostic Manual, Chassis and Drivetrain,
Volume 2

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LOCATION:    5.3 Acceleration Slip Regulation (ASR)   >   23 Electrical Test Program - Test


Electrical Test Program - Test

Test step
DTC Test scope
Test connection
Test condition
Nominal value
Possible cause/Remedy
1.0 ABS/ASR control
module (N30/1)

Voltage supply
Circuit 87

 

3
16

N30/1



 

1 1



Ignition: ON


11 - 14 V
1.1


1.1   Voltage supply from overvoltage protection relay module (K1)


W16/4



N30/1

1


Ignition: ON


11 - 14 V
Fuse at K1,
Wiring,
K1,
1.2
1.2   Ground wire


W16/4 W16/4




N30/1

3 16


Ignition: OFF


< 1
Wiring,
Ground, right component compartment (W16/4).

2.0   ABS MIL (A1e17)

 

3

N30/1



 

24



Ignition: ON


Engine: at Idle



< 2 V
A1e17: ON

10 - 14 V
A1e17: OFF



A1e17,
2.1

12,
Wiring,
N30/1.
2.1   Diode in ABS/ASR hydraulic unit, solenoid valve
relay (A7/3k1)

--

Ignition: OFF
Disconnect N30/1.
Ignition: ON

Engine: at Idle




A1e17: ON

A1e17: ON

Wiring,
A7/3k1.

3.0   ASR MIL (A1e22)

 

3

N30/1





 

12



Ignition: ON


Engine: at Idle




< 2 V
A1e22: ON

10 - 14 V
A1e22: OFF



A1e22,
3.1

12,
Wiring,
N30/1.
3.1   Diode in solenoid valve
relay (A7/3k1)

--

Ignition: OFF
Disconnect N30/1.

Ignition: ON

Engine: at Idle





A1e22: ON

A1e22: ON

Wiring,
A7/3k1.
4.0   ASR warning lamp (A1e21)

 

10

N30/2






 

1



Ignition: ON


Engine: at Idle



10 - 14 V
A1e21: ON

< 2 V
A1e21: OFF


Wiring,
A1e21.

Wiring.

5.0   Diagnosis output

 

3

N30/1


 

30



Ignition: ON


10 - 14 V
Wiring,
N30/1.
6.0   Circuit 61 voltage

 

3

N30/1


 

38



Ignition: ON

Engine: at Idle


< 1 V

11 - 14 V
Wiring,
Generator (G2).
7.0 ABS/ASR hydraulic unit, solenoid valve relay (A7/3k1)
Voltage supply



Monitor

 

8




3

N30/1




N30/1



 

20




5

Ignition: ON




11 - 14 V




11 - 14 V



12,
7.1,
Wiring.


7.2,
Wiring.
7.1   Coil resistance

 

8

N30/1


 

20

Ignition: OFF
Disconnect N30/1.


40 - 80
Wiring,
A7/3k1.

7.2   Working contact



W14


N30/1

17
Ignition: OFF
Disconnect N30/1.



< 15
Wiring,
A7/3k1.
8.0 ABS/ASR hydraulic unit, cycling module/high pressure return pump relay (A7/3n1)
Voltage supply

 

3

N30/1


 

20

Ignition: ON
Disconnect N30/1.


11 - 14 V
Wiring,
A7/3n1.
9.0 Stop lamp switch (S9/1)
N.O. contact






N.C. contact

 

3






3

N30/1





N30/1

 

29






26

Ignition: ON

Brake pedal not depressed.

Depress brake pedal.



Brake pedal not depressed.

Depress brake pedal.

 

< 1 V


11 - 14 V





11 - 14 V


< 1 V

Wiring,
F1/1-12,
K1,
S9/1.





10.0

  Parking brake switch (S12)



3
N30/1




28

Ignition: ON

Set parking brake.



Engine: at Idle
Release parking brake



A1e7: ON
< 1 V



A1e7: OFF
11 - 14 V
Wiring,
A1e7.
11.0 ASR brake fluid level
switch (S11/2)


3
N30/1




27
Ignition: ON
Brake fluid reservoir:
Full

Empty



< 3 V

11 - 14 V
Wiring,
S11/2.
12.0   ASR snow chain switch (S76)


3
N30/1






6
Engine: at Idle
Press and hold switch S76 in ON position


Press and hold switch S76 in OFF position

< 1 V
S76 indicator: ON




11 - 14 V
S76 indicator: OFF
Wiring,
S76,
N30/1.




13.0

Left front axle VSS
sensor (L6/1)



48
N30/1




49
Raise front of vehicle.
Ignition: ON
Rotate left front wheel.


> 0.1 V ~
13.1
13.1   Internal resistance


48
N30/1


 

49

Ignition: OFF
Disconnect N30/1.


0.8 - 3.7 k
Wiring,
L6/1,
13.2
13.2   Insulation resistance

 

3

N30/1


 

49

Ignition: OFF
Disconnect N30/1.


> 20 k
Wiring.
14.0   Left front axle VSS sensor (L6/1) output

 

3

N30/1


 

18

Raise front of vehicle.
Ignition: ON
Rotate left front wheel.


> 3 V ~
Wiring,
14.1,
N30/1.
14.1   Load with control modules connected.

 

3

N30/1



 

18

Ignition: OFF
Disconnect N30/1.


> 5 k

Wiring,
Control modules (A1, N4/1, N22) connected.
13.0
15.0

Right front axle VSS
sensor (L6/2)

 

46

N30/1


 

47

Raise front of vehicle.
Ignition: ON
Rotate right front wheel.


> 0.1 V ~
15.1,
15.2.
15.1   Internal resistance

 

46

N30/1


 

47

Ignition: OFF
Disconnect N30/1.


0.8 - 3.7 k
Wiring,
L6/2.
15.2   Insulation resistance

 

3

N30/1


 

47

Ignition: OFF

Disconnect N30/1.


> 20 k
Wiring.
16.0   Not for U.S.A vehicles






17.0

Left rear axle VSS
sensor (L6/3)

 

44

N30/1


 

45

Raise rear of vehicle.
Ignition: ON
Rotate left rear wheel.


> 0.1 V ~
17.1,
17.2.
17.1   Internal resistance

 

44

N30/1


 

45

Ignition: OFF
Disconnect N30/1.


0.6 - 3.2 k
Wiring,
L6/3.
17.2   Insulation resistance

 

3

N30/1


 

45

Ignition: OFF

Disconnect N30/1.


> 20 k
Wiring.
18.0   Left rear axle VSS
sensor (L6/3) output

 

3

N30/1


 

2

Raise rear of vehicle.
Ignition: ON
Rotate left rear wheel.


> 3 V ~
Wiring,
18.1,
N30/1.
18.1   Load with control modules connected

 

3

N30/1



 

2

Ignition: OFF

Disconnect N30/1.


> 5 k

Wiring,
Control modules (N3/4, N4/1) connected.
17.0.
19.0

Right rear axle VSS
sensor (L6/4)

 

42

N30/1


 

43

Raise rear of vehicle.
Ignition: ON
Rotate right rear wheel.


> 0.1 V ~
19.1,
19.2.
19.1   Internal resistance

 

42

N30/1


 

43

Ignition: OFF
Disconnect N30/1.


0.6 - 3.2 k
Wiring,
L6/4.
19.2   Insulation resistance

 

3

N30/1


 

43

Ignition: OFF

Disconnect N30/1.


> 20 k
Wiring.
20.0   Not for U.S.A vehicles






21.0 ABS/ASR hydraulic unit, left front axle solenoid
valve (A7/3y6) (hold)
Internal resistance

 

3

N30/1


 

17

Ignition: OFF
Disconnect N30/1.



5.4 - 12.6
Wiring,
ABS/ASR hydraulic unit (A7/3).
22.0 ABS/ASR hydraulic unit, left front axle solenoid
valve (A7/3y7) (release)
Internal resistance

 

3

N30/1


 

54

Ignition: OFF
Disconnect N30/1.


2.8 - 6.6
Wiring,
A7/3.
23.0 ABS/ASR hydraulic unit, right front axle solenoid
valve (A7/3y8) (hold)
Internal resistance

 

3

N30/1


 

22

Ignition: OFF
Disconnect N30/1.


5.4 - 12.6
Wiring,
A7/3.
24.0 ABS/ASR hydraulic unit, right front axle solenoid
valve (A7/3y9) (release)
Internal resistance

 

3

N30/1


 

41

Ignition: OFF
Disconnect N30/1.


2.8 - 6.6
Wiring,
A7/3.
25.0 ABS/ASR hydraulic unit, left rear axle solenoid
valve (A7/3y10) (hold)
Internal resistance

 

3

N30/1


 

4

Ignition: OFF
Disconnect N30/1.



5.4 - 12.6
Wiring,
A7/3.
26.0 ABS/ASR hydraulic unit, left rear axle solenoid
valve (A7/3y11) (release)
Internal resistance

 

3

N30/1


 

40

Ignition: OFF
Disconnect N30/1.


2.8 - 6.6
Wiring,
A7/3.
27.0 ABS/ASR hydraulic unit, right rear axle solenoid
valve (A7/3y12) (hold)
Internal resistance

 

3

N30/1


 

36

Ignition: OFF
Disconnect N30/1.


5.4 - 12.6
Wiring,
A7/3.
28.0 ABS/ASR hydraulic unit, right rear axle solenoid
valve (A7/3y13) (release)
Internal resistance

 

3

N30/1


 

37

Ignition: OFF
Disconnect N30/1.


2.8 - 6.6
Wiring,
A7/3.
29.0 ABS/ASR hydraulic unit, switchover/solenoid
valve (A7/3y5)
Internal resistance

 

3

N30/1


 

23

Ignition: OFF
Disconnect N30/1.



5.4 - 12.6
Wiring,
A7/3.
30.0 ABS/ASR hydraulic unit, return solenoid
valve (A7/3y14)
Internal resistance

 

3

N30/1


 

34

Ignition: OFF
Disconnect N30/1.


5.4 - 12.6
Wiring,
A7/3.
31.0 ASR charging pump relay
module (K20)
Coil resistance

 

9

N30/1


 

1

Ignition: OFF
Disconnect N30/1.


40 - 80
Wiring,
K20.
32.0

CAN data bus

53
N30/1


51
Ignition: OFF
Disconnect connector from N30/1. Test with ohmmeter directly on connector.



55 - 65 .
Data line,
32.1
32.1   CAN element in engine control module (N3/4)
Resistance

L
N3/4


H
Disconnect connector 1 from N3/4. Test directly on control module.



115 - 125 .
N3/4,
32.2
32.2   CAN element in EA/CC/ISC control module (N4/1)
Resistance

20
N4/1


21
Disconnect connector 1 from N4/1. Test directly on control module.

115 - 125 .
N4/1.