[2] B4/6 Rail pressure sensor offset test: Value is below limit.

[2] B4/6 Rail pressure sensor offset test: Value is below limit.

Test 1: Rail pressure sensor offset test

1. Rail pressure sensor offset test

Test 1.1: Test signal voltage of component B4/6 (Rail pressure sensor).

Test 1.2: Check power supply of component B4/6 (Rail pressure sensor).

1.1. Test signal voltage of component B4/6 (Rail pressure sensor).
Warning!Test prerequisitesThe engine must be stopped for at least 20 s prior to carrying out the test.Ignition ONContinue with button F2

Warning!Communication with ECU required.


1.2. Check power supply of component B4/6 (Rail pressure sensor).
Figure legend

- B4/6 (Rail pressure sensor)
- B11/4 (Coolant temperature sensor)
Special tool

- Adapter cable611 589 03 63 00
Test sequence

- Switch off ignition.
- Detach coupling at component B4/6 (Rail pressure sensor).
- Connect adapter cable no. 611 589 03 63 00 at component B4/6 (Rail pressure sensor).
- Measure direct voltage with multimeter between sockets 1 and 3
- Switch on ignition.
Specified value:

- Voltage[4,9...5,2] V
Question

- Is the measurement value OK?







YES
The measurement value is OK.Possible cause and remedy

- Check control module N3/9 (CDI control unit) for performance upgrade (Tuning).
- Test signal voltage of component B4/6 (Rail pressure sensor).


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

- Inspect cables and plug connections between component B4/6 (Rail pressure sensor) and control module N3/9 (CDI control unit) for loose contact, damage and corrosion, repair or replace if necessary.
End of test