Test Steps - Section 32

Preliminary work: Pneumatic System Equipment (PSE) Control Module
PSE control module voltage supply: PSE ETP test steps 1.0, 2.0
PSE Control Module Test: PSE

Data(mbar)
Test procedure
Allowable leakage of pneumatic lines and vacuum distribution block 1 at
300 mbar vacuum in 1 minute. Permissible deviation <=30 mbar
Allowable leakage of vacuum distribution block 1 with line at
300 mbar vacuum in 1 minute. Permissible deviation <=25 mbar

1) Vacuum distribution block used with gasoline models Only.

Special Tools:

A. Entire System

Preparation For Test:
1. Provide access to PSE control module (A37), disconnect transparent MVA pneumatic line with socket from PSE control module.
2. Connect tester to bottom side of pneumatic multiple connector at SRU (MVA) using connector 202 805 03 44.
3. Connect tester to disconnected pneumatic line using connector 202 805 03 44.

Gasoline models:
1. Provide access to vacuum distribution block in right component compartment and pry off all pneumatic lines except transparent MVA line at connection 1.

Diesel models:
4. Disconnect gray pneumatic line from manifold and cap using cap 000 987 11 45.
5. Provide access to vacuum distributor behind right A-pillar.
6. Disconnect medium green pneumatic line (automatic A/C) and violet pneumatic line (headlamp range adjustment).
7. Cap vacuum distributor using connector 124 805 02 44.

Important: If no leakage is found during test of MVA, check any connected pneumatic systems for leaks as well.

Parts Required for Test:
1 Connector 202 805 03 44
1 Rubber hose, 50 mm long 007 997 61 82
2 Connector 124 805 02 44
1 Cap 000 987 11 45

NOTE: The connections on the PSE control module and pneumatic multiple connector are marked with their German acronyms. In other words:
ZV (German) = CL (English),
SRU (German) = MVA (English),
OSL (German) = OSB (English).

Test Step 1.0:

B. Vacuum Distributor Block/Lines (Gasoline Models Only)

Preparation For Test:
1. Provide access to vacuum distribution block.
2. Disconnect pneumatic lines at vacuum distribution block.
3. Connect tester to white pneumatic line (pneumatic connector # 6).
4. Connect tester to one end of pneumatic line (S) and plug other end with cap, part no. 000 987 11 45.

Important: If vacuum is not available at the vacuum distribution block with the PSE control module operating correctly, check the effected lines for clogging or kinks.

Parts Required for Test:
1 Connector 202 805 03 44
1 Rubber hose, 50 mm long 007 997 61 82
1 Pneumatic line, 1 m long 000 158 14 35
1 Cap 000 987 11 45

Test Step 2.0:

C. Vacuum Reservoir

Preparation For Test:
1. Provide access to vacuum reservoir.
2. connect tester.to vacuum reservoir.

Parts Required for Test:
1 Cap 000 987 11 45
1 Rubber hose, 50 mm long 007 997 61 82
1 Connector 202 805 03 44

Test Step 3.0: