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.
Check Control Module Versions (Function 01)
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Check Control Module Versions (Function 01)
- Connect VAG 1551 scan tool. Refer to "Selectable Functions When Using VAG 1551", under "Restraint Systems", Scan Tool Connecting and Initial Checks
- Initiate On Board Diagnostic (OBD). On Board Diagnostic (OBD), Initiating Program
- Switch ignition on.
- Switch printer on with "PRINT" button (warning lamp in button lights up).
- Press buttons -0- and -1- to select "Check Control Module Versions" function 01.
Indicated on display
Rapid data transfer Q
01 - Check Control Module Versions
- Press -Q- button to confirm input.
The control module identification of the central control module for comfort system -J393- (Conv. cent. CU) is indicated on the VAG 1551 scan tool display.
1J0 959 799 AJ 5X Conv. cent. CU 0001 ->
Coding XXXXX WSC XXXXX
Breakdown of the display
- Control module Part No. 1J0 959 799 AJ: (for up-to-date control module version See parts catalog)
- Comfort system = system designation
- 5X = software version
- Coding XXXXX = code variations
- WSC = dealer code number
- press -> button.
Indicated on display (briefly) and then the following appears in the display:
Please wait
The driver's door control module identification is indicated on the VAG 1551 scan tool display.
1J0 959 802 C 5x Door CU FS0002r ->
- Press -> button.
Indicated on display (briefly) and then the following appears in the display:
Please wait
The passenger's door control module identification is indicated on the VAG 1551 scan tool display.
1J2 959 801 D Door CU FB0002r ->
- press -> button.
NOTE:
- If one of the malfunction types appear in the display, the possible causes of the malfunction can be printed out by pressing the "HELP" button.
Rapid data transfer HELP
Control module does not answer
- The ignition must be switched on.
Rapid data transfer HELP
K wire not switching to B+
- Malfunctions have occurred at the start of or during the program (external interference?).
Rapid data transfer ->
No signal from control module
- Check wiring connections for Data Link Connector (DLC), as well as voltage supply and Ground (GND) connections.
Rapid data transfer ->
Error in communication link
- Press buttons -0- and -6- to select "End Output" function 06.
Indicated on display
Rapid data transfer Q
06 - End Output
- Press -Q- button to confirm input.
Indicated on display
Rapid data transfer HELP
Insert address word XX
- Switch ignition off.
- Disconnect scan tool from Data Link Connector (DLC).
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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.