Scan Tool Connecting and Initial Checks
Test conditions:
- Selector lever in position "P" and parking brake applied.
- Vehicle voltage supply OK.
- Fuses 11,15 and 31 OK.
- Check Ground connections for transmission:
- Check Ground connections for corrosion and poor contact; repair if necessary.
- Ground connection point is located in engine compartment, left side below battery.
- Check battery Ground strap and Ground strap between battery and transmission.
Connecting Scan Tool:
- Remove cover above DLC.
- With ignition switched OFF, connect Scan Tool VAG 1551 using diagnosis cable VAG 1551/3.
Indicated on display
VAG - On Board Diagnostic HELP
1 - Rapid data transfer 1)
2 - Blink code output 1)
1) appears alternately
- Additional operating instructions can be retrieved by pressing the HELP button of VAG 1551.
- The -> button is used for advancing within the program sequence.
- An automatic check (buttons 00) can be done in operating mode 1 "Rapid data transfer". Then all vehicle control modules will be read automatically.
See Scan Tool VAG 1551 operating instructions.
- Switch ignition ON.
- Switch printer ON with the Print button (indicator lamp in button lights up).
- Press button -1- for "Rapid data transfer" mode.
Indicated on display
Rapid data transfer HELP
Enter address word XX
- Press buttons -0- and -2- to select "transmission electronics" address word 02.
Indicated on display
Rapid data transfer Q
02 transmission electronics
- Confirm entry with -Q- button.
Indicated on display
01N927733BA AG4 Transmission 01N 2754
Coding 00000 WSC 00000
The control module identification, the coding and the dealership number of the VAG 1551 are displayed:
Control module identification:
Depending upon build (program) level the control module can indicate a different control module identification to that shown in the example. Application of control module See Parts
- 01N 927 733: Part No.
- AG4 transmission 01N: 4-speed automatic transmission 01N
- 2754: EPROM (Program level)
- Coding 00000: is not required at present.
- WSC 00000: VAG 1551 dealership number with which the last coding was performed.
Indicated on display
Control module does not answer! HELP
- By pressing the HELP button, a list of possible malfunction causes is printed out.
- After eliminating the possible causes of malfunctions, again enter the address word 02 for "transmission electronics" and confirm.
If "Control module does not answer!" again appears:
Indicated on display
Control module does not answer! HELP
Check control module voltage supply:
- Perform test step 1. See "Electrical Testing (TCM Pinout Charts)".
- Check wiring connections to DLC
See Wiring Diagrams and Component Locations
- See Diagnostic Charts under DTC 65535 control module faulty!
- Press -> button.
Indicated on display
Rapid data transfer HELP
Select function XX
- After the HELP button is pressed, a list of the possible functions is printed out.