Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN2013BEETLE BASE, 2D HATCHBACK, 2.5L ENG VIN X, AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 547 (MODULE COMMUNICATIONS NETWORK SYSTEM)DIAGNOSIS AND TESTINGCOMMUNICATIONS NETWORKINSPECTION AND VERIFICATIONNOTES
2013 Volkswagen Beetle Base, 2D Hatchback, 2.5L Eng VIN X, Automatic Trans
Inspection and Verification: Notes
2013 Volkswagen Beetle Base, 2D Hatchback, 2.5L Eng VIN X, Automatic TransSECTION Notes
WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- Visually inspect for obvious signs of electrical damage.VISUAL INSPECTION TABLE
Electrical - Smart junction box (SJB) fuse 9 (20A)
- Wiring harness
- Connections
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.
- If the diagnostic tool still does not communicate with the vehicle, GO to PINPOINT TEST O .
- GO to PINPOINT TEST PC .
Diagnostic Trouble Code (DTC) Index
DIAGNOSTIC TROUBLE CODE (DTC) INDEX
| DTC | Description | Source | Action |
|---|---|---|---|
| U0001 | High Speed Communication Bus | DEM | GO to PINPOINT TEST M . |
| U0002 | High Speed Communication Bus Performance | Instrument Cluster | GO to PINPOINT TEST M . |
| U0020 | Low Speed Communication Bus Performance | Instrument Cluster | GO to PINPOINT TEST N . |
| U0073 | High Speed Communication Bus | Transmission Control Module (TCM) | GO to PINPOINT TEST M . |
| U0100 | Lost Communication With ECM/PCM | TCM - Aisin transmission | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test. |
| U0100 | Lost Communication With ECM/PCM | TCM - CVT transmission | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test. |
| U1900 | CAN Communication Bus Fault | ABS Module | GO to PINPOINT TEST M . |
| U1900 | CAN Communication Bus Fault | Audio Unit | GO to PINPOINT TEST N . |
| U1900 | CAN Communication Bus Fault | DSM | GO to PINPOINT TEST N . |
| U1900 | CAN Communication Bus Fault | RCM | GO to PINPOINT TEST M . |
| U1900 | CAN Communication Bus Fault | SJB | GO to PINPOINT TEST N . |
| U1900 | CAN Communication Bus Fault - Receive Error (High Speed CAN) | Instrument Cluster | GO to PINPOINT TEST M . |
| U1901 | CAN Network #2 Communication BUS Fault - Receive Error (Medium Speed CAN) | Instrument Cluster | GO to PINPOINT TEST N . |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.