Workshop Repair Manuals

Volkswagen Workshop Manuals

[PREV PAGE] [NEXT PAGE]

volkswagen Workshop Repair Guides


Passat Sedan V6-3.6L (BLV) (2008)

Powertrain Management > Computers and Control Systems > Information Bus > Component Information > Testing and Inspection > Initial Inspection and Diagnostic Overview > Page 3079

Page 3
background image

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, Checking

Diagnostic Procedures

CAN-Bus Terminal Resistance, 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) 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.

Test procedure

-

Observe safety precautions. Refer to => [ Safety Precautions ] See: Service Precautions/Safety Precautions

-

Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Service Precautions/Clean Working Conditions

-

Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Testing and Inspection/Scan Tool Testing

Powertrain Management > Computers and Control Systems > Information Bus > Component Information > Testing and Inspection > Initial Inspection and Diagnostic Overview > Page 3079

[PREV PAGE] [NEXT PAGE]