DTC Memory Checking and Erasing

Diagnostic Trouble Code (DTC) Memory

DTC Memory, Checking (function 02) And Erasing (Function 05)

Special tools and equipment
- VAG 1551 Scan tool (or VAG 1552 Scan tool) with VAG 1551/3B cable

Procedure


NOTE: All functions previously performed with the VAG 1551/1552 can also be performed using the VAS 5051 tester.


- Connect VAG 1551 Scan tool ((VAG 1552) and select the control module for engine electronics via address word 01. Engine must run at idle for this.
Connecting scan tool and selecting control module for engine electronics. Refer to Scan Tool Connecting and Initial Checks. Scan Tool Testing and Procedures


NOTE:
Only if engine does not start:
- Operate starter for approx. 6 seconds. Do not switch ignition off afterward.
- Press -Print- button to turn on Scan Tool (ST) printer. Indicator lamp in button must light up.


Indicated on display:


Rapid data transfer HELP
Select function XX


- Operate scan tool according to indications on display:
- Press buttons -0- and -2- to select "Check DTC Memory" function 02.
Press -Q- button to confirm input.


Number of stored DTCs or "No DTC recognized" will be indicated on display.


X malfunctions recognized!


NOTE:
If no DTCs are stored:
- Press -> button.
If one or more DTCs are stored:
The stored malfunctions are displayed and printed out in sequence.


After stored malfunctions have been printed out, display indicates:


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -5- to select "Erase DTC Memory" function 05. Press -Q- button to confirm input.

Indicated on display:


Rapid data transfer ->
DTC Memory is erased!


NOTE: If ignition was switched off between the steps "Check DTC memory" and "Erase DTC memory", DTC memory will not be erased.


- Press the -> button.

Indicated on display:


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -6- to select "End Output" function 06. Press -Q- button to confirm input.
- Repair malfunctions that were printed out using DTC table:SAE P0 and P2 codes. SAE P1 and P3 codes. P Code Charts
- Read readiness code. If DTC memory was erased or the Engine Control Module (ECM) was disconnected from the continuous B+ supply, the readiness code must be re-generated. Monitors, Trips, Drive Cycles and Readiness Codes Monitors, Trips, Drive Cycles and Readiness Codes