Pneumatic System Equipment (PSE)

Removing and installing PSE control module

1 - Foam block 2 - Pneumatic strip 3 - Pneumatic strip 4 - Electrical connector A37 - PSE control module (combined)

1. Remove paneling in trunk (except right side paneling and rear wall paneling)
2. Press apart plastic lugs (arrows) and remove foam cap (1)
3. Unclip pneumatic strips (2, 3) on pneumatic control module with PSE control module (combined) (A37). Clips are located in the oblong holes marked with arrows. Unclip with flat tool, e.g. screwdriver.
4. Loosen electrical connector (4) on PSE control module (combined) (A37) and remove lead. Turn in direction of arrow.
5. Remove PSE control module (combined) (A37).
6. Install in opposite order. If the PSE is replaced version coding must be accomplished via STAR DIAGNOSIS.
7. Check central locking, lumbar support or multicontour backrest, power locking, head restraint extension and retraction for proper function.

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Error codes

Error codes generated by PSE (pneumatic system equipment) control unit.

Error Code	Description
B1436-012	The safety time of the central locking has been exceeded for the following pneumatic branch: Driver's door
B1436-014	The safety time of the central locking has been exceeded for the following pneumatic branch: Front passenger door or rear doors
B1436-015	The safety time of the central locking has been exceeded for the following pneumatic branch: Passenger door
B1436-016	The safety time of the central locking has been exceeded for the following pneumatic branch: Left rear door
B1436-017	The safety time of the central locking has been exceeded for the following pneumatic branch: Right rear door
B1437	The safety time has been exceeded for the following pneumatic branch: Lower or raise rear head restraints.
B1438-011	The air demand of the multicontour backrest is too high.
B1438-012	The safety time has been exceeded for the following pneumatic branch: Multicontour backrest
B1438-013	Continuous cutoff of multicontour backrest: The safety time was exceeded 5 times.
B1440-010	The safety time has been exceeded for the following pneumatic branch: Trunk lid remote release
B1440-011	The operating time of the trunk lid external pushbutton was exceeded.
B1440-012	The operating time of the trunk lid internal pushbutton was exceeded.
B1442-012	The safety time of the power closing has been exceeded for the following pneumatic branch: Driver's door
B1442-015	The safety time of the power closing has been exceeded for the following pneumatic branch: Passenger door
B1442-016	The safety time of the power closing has been exceeded for the following pneumatic branch: Left rear door
B1442-017	The safety time of the power closing has been exceeded for the following pneumatic branch: Right rear door
B1442-018	The safety time of the power closing has been exceeded for the following pneumatic branch: Trunk lid
B1446-002	Component Y65/3 (CL remote trunk lid release valve): Short circuit to ground or open circuit
B1447-002	Fault in hydraulic unit of trunk lid: Function 'Close trunk lid.' has short circuit to ground or open circuit.
B1447-032	Fault in hydraulic unit of trunk lid: Function 'Open trunk lid.' has short circuit to ground or open circuit.
B1447-064	Fault in hydraulic unit of trunk lid: Timeout of on-period
B1448-001	Component B24/16 (Trunk lid opening angle detection sensor) is not connected.
B1448-002	The sensor cable or sensor supply of component B24/16 (Trunk lid opening angle detection sensor) has short circuit to ground or to battery voltage.
B1448-004	The normalizing values of component B24/16 (Trunk lid opening angle detection sensor) are implausible or the sensor value is not within the normalizing range.

DAS adaptations

Adaptations available in DAS for PSE control unit (A2208001248).

Adaptations menu.

List of adaptations.

Trunk lid remote release.

Trunk lid remote closing.

Trunk interior button.

Head retraint adjustment.

Multicontour backrests.

Central locking.

Power locking.

Childproof locks.

Emergency opening.

Factory settings trunk lid remote closing.

DAS actuations

Actuations available in DAS for PSE control unit (A2208001248).

List of actuations.

Unlock trunk lid.

Open or close central locking.

Lower or raise head restraints.

Deactivate the child safety lock of the rear doors.

Emergency opening by simulating the crash signal.

DAS actual values

Actual values available in DAS for PSE control unit (A2208001248).

Actuatual values menu.

Truk lid.

Central locking signal sources.

Central locking signal sources (cont).

CL convenience times and speed thresholds.