[4] Check component Y10/1 (Power steering pump pressure regulator valve).: Signal line is interrupted.

[4] Check component Y10/1 (Power steering pump pressure regulator valve).: Signal line is interrupted.

Test 1: Check component Y10/1 (Power steering pump pressure regulator valve).

1. Check component Y10/1 (Power steering pump pressure regulator valve).

Test 1.1: Check component Y10/1 (Power steering pump pressure regulator valve) by means of actuation.

Test 1.2: Check power supply of component Y10/1 (Power steering pump pressure regulator valve).

1.1. Check component Y10/1 (Power steering pump pressure regulator valve) by means of actuation.
Figure legend

- Y10/1 (Power steering pump pressure regulator valve)
Test prerequisite

- Operate engine at idling speed.
Explanation of the following test

- The steering must be more sluggish during actuation.
Proceed to 'Actuation' with F2







Warning!Communication with ECU required.


1.2. Check power supply of component Y10/1 (Power steering pump pressure regulator valve).
Power supply Check component Y10/1 (Power steering pump pressure regulator valve).
Figure legend

- Y10/1 (Power steering pump pressure regulator valve)
Special tool

- Adapter cable220 589 00 99 37
Test sequence

- Switch off ignition.
- Detach coupling at component Y10/1 (Power steering pump pressure regulator valve).
- Connect adapter cable no. 220 589 00 99 37 to engine wiring harness Y10/1 (Power steering pump pressure regulator valve).
- Measure direct voltage with multimeter between ground and socket (Y10/1x1) 2
- Switch on ignition.
Specified value

- Voltage[11...14] V
Question

- Is the measurement value OK?







YES
Test signal line between components N3/9 (CDI control unit) and Y10/1 (Power steering pump pressure regulator valve) for Open circuit.
Figure legend

- Y10/1 (Power steering pump pressure regulator valve)
Test sequence

- Switch off ignition.
- Unplug connector of control module and component.
- Connect 126-pole socket box at engine wiring harness.
- Measure resistance with multimeter between socket (M.45) 45 of the 126-pole socket box tester and socket (Y10/1x1) 1
Specified value

- Resistor< 1ohms
Question

- Is the measurement value OK?







YES
Check internal resistance of component Y10/1 (Power steering pump pressure regulator valve).
The measurement value is OK.Figure legend

- Y10/1 (Power steering pump pressure regulator valve)
Test sequence

- Switch off ignition.
- Connect adapter cable no. 220 589 00 99 37 at component Y10/1 (Power steering pump pressure regulator valve).
- Test resistance.
- Measure resistance with multimeter between sockets (Y10/1) 1 and (Y10/1) 2
Specified value

- Resistor[3.5...9.5]ohms
Question

- Is the measurement value OK?







YES
The measurement value is OK.End of test

NO
The measurement value is not OK.Replace component Y10/1 (Power steering pump pressure regulator valve).End of test

NO
The measurement value is not OK.Possible cause and remedy

- Test lines between components N3/9 (CDI control unit) and Y10/1 (Power steering pump pressure regulator valve) for Open circuit.
End of test

NO
The measurement value is not OK.Possible cause and remedy

- N10/1f44 (Fuse 44)
- Test lines between components N3/9 (CDI control unit) and Y10/1 (Power steering pump pressure regulator valve) for Open circuit.
End of test