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 MANUALSVOLKSWAGEN2003PASSAT SEDAN 4MOTION (3B3) W8-4.0L (BDP)REPAIR AND DIAGNOSISBODY AND FRAMETESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL CONNECTING AND INITIAL CHECKSCONTROL MODULE VERSION, CHECKING (FUNCTION 01)
2003 Volkswagen Passat Sedan 4Motion (3B3) W8-4.0L (BDP)
Control Module Version, Checking (Function 01)
2003 Volkswagen Passat Sedan 4Motion (3B3) W8-4.0L (BDP)SECTION Control Module Version, Checking (Function 01)
Check Control Module Version
- Connecting Scan Tool.
- Initiating On Board Diagnostic (OBD).
- Switch on ignition.
- Press key -1- for "Rapid Data Transfer" mode.
- Switch on printer with Print button (warning lamp in button lights up).
- Press keys -0- and -1-.
Indicated on display
Rapid data transfer Q
01 - Check Control Module Version
- Confirm with -Q- key.
The control module identification of the convenience central control module (Conv. cent. CU) will be shown on the VAG 1551 Scan Tool display, e.g.:
1J0959799J 03 Conv. cent. CU 0001->
Coding XXXXX WSC XXXXX
Breakdown of the display:
- Top line Part No. of control module system designation (03 (2) Conv. cent. CU 0001)
- Lower line Code number Dealership number (1)
1) Will be automatically stored in the control module when entering the system.
2) A number or number/letter combination (03 or 6Q or others) indicate correct programming of control module.
- Press -> key.
Will appear briefly in display:
Please wait
and then the following appears in the display:
The control module identification of the driver's door control module will be shown on the VAG 1551 Scan Tool display, e.g.:
1J0959801A 03 Door CU DS0022 ->
- Press -> key.
Will appear briefly in display:
Please wait
and then the following appears in the display:
The control module identification of the passenger's door control module will be shown on the VAG 1551 Scan Tool display, e.g.:
1J0959802B 03 Door CU PSOO22 ->
- Press -> key.
Will appear briefly in display:
Please wait
and then the following appears in the display:
The control module identification of the rear left door control module will be shown on the VAG 1551 Scan Tool display, e.g.:
1J0959811A 03 Door CU RL0022 ->
- Press -> key.
Will appear briefly in display:
Please wait
and then the following appears in the display:
The control module identification of the rear right door control module will be shown on the VAG 1551 Scan Tool display, e.g.:
1J0959812A 03 Door CU RR0022 ->
- Press -> key.
Indicated on display
Rapid data transfer HELP
Select function XX
NOTE:
- If one of the malfunction messages opposite appears in the display, the possible causes of the malfunction can be printed out with the HELP key.
Rapid data transfer HELP
Control module does not answer!
- Ignition must be switched on.
Rapid data transfer HELP
K wire is not switching to positive!
- Malfunctions have occurred at the start of or during the program (external interference?).
Rapid data transfer ->
No signal from control module!
- Check diagnostic cable as well as voltage supply and Ground connection.
Rapid data transfer ->
Fault in communication build up
- Press keys -0- and -6- to end the output.
Indicated on display
Rapid data transfer Q
06 - End output
- Confirm with -Q- key.
Indicated on display
Rapid data transfer HELP
Enter address word XX
- Switch off ignition.
- Disconnect connector to VAG 1551 Scan Tool.
RENDER: 1.0x
NO RELATED
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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.