Workshop Hints

Workshop Hints
Working on Hydraulic System
Prior to any work on the hydraulic system, the system pressure must be reduced with the Service Function "Before working on hydraulic system" using the DlSplus/GT1. The hydraulic pump relay must be removed to prevent the hydraulic pump from starting.
The Service Function After working on hydraulic system must be performed with the DlSplus/GT1. The hydraulic system is vented. The service function "Teach gearbox" must be performed.
The hydraulic pump must not run dry! The relay must not be reconnected for the entire duration of the repair work. After work is completed on the hydraulic system, the hydraulic fluid level must be checked and topped up if necessary. The hydraulic pump relay can be reconnected. The hydraulic fluid level must be checked again.

Teaching Gearbox
The Service Function teaching gearbox must be implemented with the DlSplus/GT1 when the following components are replaced or repaired:
^ SMG Control Module
^ Gearbox
^ Clutch
^ Gearbox sensors
The SMG Control Module learns the clutching characteristic during the drive off operations.
There may therefore be impaired comfort during the initial gearshift operations.

Diagnosis





Diagnosis of the SMG corresponds to diagnosis of the (E85) Z4 and includes the following:
^ Read identification
^ Read fault memory
^ Delete fault memory
^ Diagnosis check
^ Sensor signals at gearbox
^ Signals from vehicle
^ Bus signals
^ Programming