With Manufacturer's Scan Tool
Check DTC memory of all control modules, Automatic test sequence. [1][2][3]Automatic Test Sequence
DTC memory, checking and erasing
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
- VAG 1551 scan tool (or VAG 1552 vehicle system tester) with VAG 1551/3 adapter cable
NOTE: All functions which could previously be performed with VAG 1551/1552 can also be performed with VAS 5051.
Test prerequisites
- The fuses must be OK.
- The main fuses must be OK.
- The battery voltage must be at least 11.5 V.
- Ground (GND) connection between engine and body must be OK.
- All electrical devices, e.g. lights and rear window heating must be turned off.
- If the vehicle is equipped with air conditioning, it must be turned off.
- Selector lever must be in position "P" or "N" on vehicles with an automatic transmission.
Work sequence
- Connect VAG 1551 scan tool (or VAG 1552) and select Engine Control Module (ECM) with the "Address word" 01. When doing this the engine must be running at idle: (Connecting scan tool and selecting Engine Control Module (ECM) [1][2][3]Connecting VAG 1551 Scan Tool ).
NOTE: Only when engine does not start:
- Operate starter for approx. 6 seconds. Then do not switch the ignition off.
- Switch on scan tool printer with the print button. The warning light in button must light up.
Indicated on display:
Rapid data transfer HELP
Select function XX
- Operate scan tool, taking into account the information on the display:
- Press buttons -0- and -2- for function "Check DTC memory" and confirm entry with -Q- button.
The number of Diagnostic Trouble Codes (DTCs) stored or "No malfunction detected!" will be shown on the display.
X Diagnostic Trouble Codes (DTCs) detected!
NOTE:
If no DTC is stored:
- Press the -> button.
If one or more Diagnostic Trouble Codes (DTCs) are stored:
The stored Diagnostic Trouble Codes (DTCs) will be displayed and printed out one after the other.
After the stored Diagnostic Trouble Codes (DTCs) have been printed out, the display will show:
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -5- for the function "Erase DTC memory" and confirm entry with -Q- button.
Indicated on display:
Rapid data transfer ->
DTC memory is erased!
NOTE: If the ignition is switched off between "Check DTC memory" and "Erase DTC memory" the DTC memory will not be erased.
- Press the -> button.
Indicated on display:
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -6- for the function "End output" and confirm entry with the -Q- button.
- Repair Diagnostic Trouble Codes (DTCs) printed out using DTC table:
SAE P0 codes SAE P0 Codes
SAE P1 codes SAE P1 Codes
SAE P2 codes SAE P2 Codes
SAE P3 codes SAE P3 Codes
- Read readiness code. If the DTC memory has been erased or the Motronic Engine Control Module (ECM) -J220- was disconnected from battery (B+) positive, the readiness code must be generated again. Monitors, Trips, Drive Cycles and Readiness Codes Monitors, Trips, Drive Cycles and Readiness Codes.