Drivetrain - Transfer Case Offset & Gradient Values
3Cayenne
(92A)
66/11 ENU 3913
Sep 7, 2011
The present document was valid at the time of print. A later version may be available online
Spare Parts Requirements for Transfer Case/All-wheel Drive
Control Unit: Missing Offset and Gradient Values on the Transfer
Case (66/11)
Model year:
as of 2011 up to 2012
Information
^ Document with limited validity
This Quick Information is valid until December 31, 2011
Vehicle Type:
Cayenne (92A)/Cayenne S (92A)/Cayenne Turbo (92A)
Concerns:Transfer case
Information:
Missing offset and gradient values on the transfer case
When you replace the all-wheel drive control unit or the transfer case (with the all-wheel drive control unit), the offset and gradient values (referred to below as classification data) must be written into the new all-wheel drive control unit.
The absence of classification data in the all-wheel drive control unit will result in poor vehicle driveability.
Since the classification data always relates to and is matched to the transfer case, it is engraved on the transfer case; Figure 1 shows 15 as the gradient value and OS as the offset value.
Due to a production error, only 0" might be engraved instead of the correct classification data, Figure 2.
If this is the case, the correct classification data must be read out of the all-wheel drive control unit or may have to be queried from the Technical HOTLINE.
Work Procedure:
The procedure will be different, depending on the spare parts requirements:
^ Control unit replacement - data from the old all-wheel drive control unit can be read out.
^ Control unit replacement - data from the old all-wheel drive control unit can no longer be read out. Transfer case replacement.
Information
The procedures described here are based on the PIWIS Tester II software version 9.600.
The PIWIS Tester instructions take precedence and in the event of a discrepancy, these are the instructions that must be followed.
A discrepancy may arise with later software versions for example.
Control unit replacement - data from the old control unit can be read out:
Control unit replacement - data from the old control unit can no longer be read out:
Transfer case replacement:
If the transfer case needs to be replaced, the new transfer case will be delivered together with a new control unit. The correct classification data for the supplied transfer case is already stored on the new control unit.
The classification data must be entered again in order to enter the chassis number in the all-wheel drive control unit as the function Enter chassis number in all-wheel drive control unit" is not currently available on PIWIS Tester II.
Information
With software update 10.000 (available from around November 2011), it is expected that the missing chassis number can be entered manually in the all-wheel drive control unit using PIWIS Tester II.
92AAG1, 92AAG7, 92AAH1, 92AA11, 92AAT1
Model year as of 2011, Model year up to 2012
C02, C36