[8] N3/9 (CDI control unit) Atmospheric pressure sensor: The atmospheric pressure between component N3/9 (CDI control unit) and

[8] N3/9 (CDI control unit) Atmospheric pressure sensor: The atmospheric pressure between component N3/9 (CDI control unit) and component B5/1 (Charge pressure sensor) is implausible.

Test 1: Check component B28/8 (Pressure differential sensor (TWC [KAT])).

1. Check component B28/8 (Pressure differential sensor (TWC [KAT])).
Check actual value Atmospheric pressure.
Test prerequisite

- Ignition ON
Status of the relevant actual values:
- Boost pressure:Warning! Communication with ECU required.

- Atmospheric pressure:Warning! Communication with ECU required.

- Intake air pressure:Warning! Communication with ECU required.
Specified value

- With the ignition on, the values for boost pressure, atmospheric pressure and intake air pressure must not deviate from one another by more than 30 mbar.
Question

- Are the read-out values OK?


YES
The actual value is okay.Test wiring N3/9 (CDI control unit) - B28/5 (Pressure sensor downstream of air cleaner) and N3/9 (CDI control unit) - B5/1 (Charge pressure sensor) for Loose contact, repair or replace if necessary.End of test

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

- Test wiring N3/9 (CDI control unit) - B28/5 (Pressure sensor downstream of air cleaner) and N3/9 (CDI control unit) - B5/1 (Charge pressure sensor) for Open circuit, repair or replace if necessary.


1. No further information available.