A/T Controls - Gears Intermittently Can't Be Engaged
SI B 25 02 09Gear Shift Mechanism
April 2009
Technical Service
SUBJECT
E70, E71 GWS - Gears Intermittently Cannot Be Engaged
MODEL
E70 (X5), E71 (X6) with 6HP19TU or 6HP26TU transmission
SITUATION
The customer may complain that intermittently one of the gears cannot be selected - mainly when shifting manually in the M mode.
The GWS-related fault codes A836 ("GWS Hall sensor single error") and/or A837 ("GWS Hall sensor double error) may be stored in the shifter fault memory.
CORRECTION
The GWS faults' A836/A837 frequency read from the faults' environmental conditions may show only a single occurrence. In this case, the GWS fault memory should be cleared and the vehicle can be released without any repair attempts.
If the GWS faults A836/A837 are stored multiple times (the fault frequency of any of the listed faults is higher then one), the GWS shifter has to be replaced and the vehicle needs to be reprogrammed with the current version of ISTA/P.
PARTS INFORMATION
WARRANTY INFORMATION
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