Passat Sedan V6-3.6L (BLV) (2008)
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Testing and Inspection/Scan Tool Testing and
Procedures/Diagnostic Modes 01 - 09.
2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Diagnostic Modes 01 - 09.
3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Testing and Inspection/Monitors, Trips, Drive
Cycles and Readiness Codes.
CAN-Bus Terminal Resistance, Direct Shift Gearbox Mechatronic to Direct Shift Gearbox
Mechatronic, Checking
Diagnostic Procedures
CAN-Bus Terminal Resistance, Direct Shift Gearbox Mechatronic to Direct Shift Gearbox Mechatronic, Checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirement
‹› A CAN Bus malfunction was recognized.
‹› The Motronic Engine Control Module (ECM) (J623) and Direct Shift Gearbox (DSG) Mechatronic (J743) fuses OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".
‹› A/C switched off.
‹› Ground connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Function
The Motronic Engine Control Module (ECM) (J623) communicates with other CAN-Bus capable control modules.
The control modules are connected by two Data Bus wires which are twisted together (CAN High and CAN Low), and exchange information
(messages). Missing information on the CAN Bus is recognized as a malfunction by the Motronic Engine Control Module (ECM) (J623) and the other
control modules connected to the CAN Bus.
Trouble-free operation of the CAN Bus requires that it have a terminal resistance. This central terminal resistance is located in the Motronic Engine
Control Module (ECM) (J623).
Test procedure
-
Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check
Start diagnosis
-
Disconnect the Direct Shift Gearbox (DSG) Mechatronic (J743) electrical harness connector.