Preliminary work: PSE control module voltage supply 23 PSE 1.0, 2.0 PSE Control Module Test 32 PSE

Data (mbar)

Test procedure	Permissible deviation
Allowable leakage of pneumatic lines and vacuum distribution block1) at 300 mbar vacuum in 1 minute.	30 mbar
Allowable leakage of vacuum distribution block1) with line at 300 mbar vacuum in 1 minute.	25 mbar

1) Vacuum distribution block used with gasoline models only.

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. 2. 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. 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 scope	Test connection	Test condition	Nominal value	Possible cause/Remedy
1.0	Multiple connector, pneumatic line with vacuum distribution block 1)	Black connector on tester to connector.	Apply 300 mbar vacuum to entire system.	Vacuum loss 30 mbar in 1 minute.	2.0, 3.0

1) Vacuum distribuor block on 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). Parts Required for Test: 1 Connector 202 805 03 44 1 Rubber hose, 50 mm long 007 997 61 82 1 Pneumatic line, 1m long 000 158 14 35

	Test scope	Test connection	Test condition	Nominal value	Possible cause/Remedy
2.0	Vacuum applied to vacuum distribution block and pneumatic line	Black connector on tester.	Apply 300 mbar vacuum to vacuum distribution block and line.	Vacuum loss 25 mbar in 1 minute.	Vacuum distributor block leaks. Replace.

Preparation for Test: 1. Connect tester to one end of pneumatic line and plug other end with cap, part no. 000 987 11 45. 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 Cap 000 987 11 45 1 Rubber hose, 50 mm long 007 997 61 82 1 Connector 202 805 03 44

	Test scope	Test connection	Test condition	Nominal value	Possible cause/Remedy
3.0	Vacuum leakage	Black connector on tester.	Apply 300 mbar vacuum to vacuum distribution block.	Vacuum loss 0 mbar in 1 minute.	Pneumatic line or vacuum distribution block. Replace.