ESP and SPS test of electrical system ESP hydraulic unit

AD42.45-P-6001-21B

ESP and SPS test of electrical system ESP hydraulic unit

Solenoid valves (A7/3y6-y13)





Scope of test

Measuring instrument/
Test connection

Operation/Requirement

Specified value

 Possible cause/Remedy

1.0

 



 

ESP hydraulic unit (A7/3)

Solenoid valves

(A7/3y6–y13)



Raise vehicle

Actuate all solenoid valves one after the other:

 and brake operated

 and brake operated



Wheel unbraked



Wheel braked

 Cables

 Depending on solenoid valve actuated:

 1.1 to  1.8

1.1

Left front axle solenoid valve (hold) (A7/3y6)

Internal resistance

80 

(2.46)

N47–5





73

(2.39)

Ignition: OFF

Disconnect ESP control module (N47-5)

5.4-12.6 Ω

 Cables

 ESP hydraulic unit (A7/3)

1.2

Left front axle solenoid valve (release) (A7/3y7)

Internal resistance

80

(2.46)

N47–5





72

(2.38)

Ignition: OFF

Disconnect ESP control module (N47-5)

2.8-6.6Ω

 Cables

 ESP hydraulic unit (A7/3)

1.3

Right front axle solenoid valve (hold) (A7/3y8)

Internal resistance

80 

(2.46)

N47–5





74

(2.40)

Ignition: OFF

Disconnect ESP control module (N47-5)

5.4-12.6 Ω

 Cables

 ESP hydraulic unit (A7/3)

1.4

Right front axle solenoid valve (release) (A7/3y9)

Internal resistance

80 

(2.46)

N47–5





71

(2.37)

Ignition: OFF

Disconnect ESP control module (N47-5)

2.8-6.6 Ω

 Cables

 ESP hydraulic unit (A7/3)

1.5

Left rear axle solenoid valve (hold) (A7/3y10)

Internal resistance

80 

(2.46)

N47-5





 69

(2.35)

Ignition: OFF

Disconnect ESP control module (N47-5)

5.4-12.6 Ω

 Cables

 ESP hydraulic unit (A7/3)

1.6

Left rear axle solenoid valve (release) (A7/3y11)

Internal resistance

80 

(2.46)

N47-5





 70

(2.36)

Ignition: OFF

Disconnect ESP control module (N47-5)

2.8-6.6 Ω

 Cables

 ESP hydraulic unit (A7/3)

1.7

Right rear axle solenoid valve (hold) (A7/3y12)

Internal resistance

80 

(2.46)

N47-5





64

(2.30)

Ignition: OFF

Disconnect ESP control module (N47-5)

5.4-12.6 Ω

 Cables

 ESP hydraulic unit (A7/3)

1.8

Right rear axle solenoid valve (release) (A7/3y13)

Internal resistance

80 

(2.46)

N47-5





 65

(2.31)

Ignition: OFF

Disconnect ESP control module (N47-5)

2.8-6.6 Ω

 Cables

 ESP hydraulic unit (A7/3)