Test Steps - Section 12

Preliminary work: Pneumatic System Equipment (PSE) Control Module
PSE control module voltage supply: see ETP tests steps 1.0 and 2.0 for PSE Control Module.
PSE Control Module Test:

Data (mbar)
Test Procedure:
Allowable leakage of pneumatic multiple connector, pneumatic lines and vacuum distribution block at:
300 mbar vacuum in 1 minute. Permissible deviation is no more than 30 mbar.

Allowable leakage of vacuum distribution block with line at:
300 mbar vacuum in 1 minute. Permissible deviation is no more than 25 mbar.

Special Tools:

A. Pneumatic Multiple Connector, Pneumatic Line with Vacuum Distribution Block:

Preparation For Test:

Vehicles up to approx. 12/93:
1. Disconnect pneumatic multiple connector from PSE control module.
2. Connect tester to bottom side of pneumatic multiple connector at SRU (MVA) using connector 129 805 04 44.

Vehicles as of approx. 01/94:
1. Disconnect transparent MVA pneumatic line with socket from PSE control module.
2. Connect tester to disconnected pneumatic line using connector 129 805 04 44.

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

Parts Required for Test:
1 Connector 129 805 04 44
1 Connector, 50 mm long 007 997 61 82

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. Line with Vacuum Distribution Block:

Preparation For Test:

Vehicles up to approx. 12/93:
1. Pry off transparent MVA pneumatic line at pneumatic multiple connector (using a 7 mm open end wrench)
2. Connect tester to transparent MVA pneumatic line using connector 007 997 61 82.

Vehicles as of approx. 01/94:
1. Disconnect transparent MVA pneumatic line from PSE control module.
2. Connect tester to disconnected pneumatic line using connector 129 805 04 44.

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

Parts Required for Test:
1 Connector, 50 mm long 007 997 61 82
1 Connector 129 805 04 44

Test Step 2.0:

C. Vacuum Distribution Block:

Preparation For Test:
1. Remove vacuum distribution block.
2. Connect vacuum/pressure tester to connection 1.

Parts Required for Test:
1 Connector 129 805 04 44
1 Connector, 50 mm long 007 997 61 82

Test Step 3.0:

D. Line:

Preparation For Test:
1. Connect tester to one end of pneumatic line and plug other end with cap part no. 000 987 29 45.

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

Parts Required for Test:
1 Cap 000 987 29 45
1 Connector, 50 mm long 007 997 61 82
1 Connector 129 805 04 44

Test Step 4.0: