Connecting and Operating VAG 1551 Scan Tool
Test Conditions:- Battery Positive Voltage (B+) OK
- B+ power supply and fuses for each system OK
- Selector lever in "P" position
- Parking brake applied
- Transmission Ground (GND) connections OK
- Check Ground connections for corrosion or poor contact, and repair if necessary:
^ Ground connection near intake manifold on engine
^ Battery Ground strap
^ Ground connection between Battery and transmission.
- Switch ignition off.
Connecting:
- Remove cover from relay station -1- in plenum, left side.
- Connect VAG1551 scan tool and VAG1551/1 adapter to Data Link Connectors (DLC) in auxiliary relay panel 1 (left side of plenum):
^ Connect black connector to black DLC.
^ Connect white connector to white DLC.
^ The blue connector is not used
NOTE: If there is no display, check the voltage supply to the black DLC in the plenum.
Indicated on display: (Operating modes 1 and 2 are displayed alternately)
V.A.G. - ON BOARD DIAGNOSTIC HELP
1 - Rapid data transfer
2 - Blink code output
NOTES:
^ Press the "HELP" button for additional information.
^ Press the -> button to advance through the OBD program.
^ Press the "PRINT" button to switch on the scan tool printer (indicator light in button comes on).
Selecting :
- Switch ignition on.
- Depress brake pedal once.
- Switch printer on by pressing "PRINT" button (indicator lamp in button comes on).
- Press -1- button to select "Rapid data transfer" operating mode 1.
Indicated on display:
Rapid data transfer HELP
Insert address word XX
NOTE: To initiate an automatic test sequence (a check of DTC memory for all systems with OBD capability), insert address word 00 and press the -Q- button to confirm.
Indicated on display:
Rapid data transfer HELP
Insert 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
- Press -Q- button to confirm input.
Indicated on display (TCM identification and coding, example):
01N927733AD AG4 Gearbox 01N 2033
Coding 00000 WSC 00000
Example:
^ 01N 927 733 AD: TCM Part No. (example, verify correct application using parts catalog microfiche)
^ AG4 Gearbox 01N: 4-speed automatic transmission 01N
^ 2033: EPROM (program level)
^ Coding 00000: not required at present
^ WSC 00000: Dealership no. for scan tool with which TCM was last checked
- Press -> button.
Indicated on display:
Rapid data transfer HELP
Select function XX
- Select function. Connecting and Operating VAG 1551 Scan Tool
If "Control module does not answer" appears in the display:
Rapid data transfer HELP
Control module does not answer!
- Press "HELP" button to list possible malfunction causes.
- Check DLC connections according to wiring diagram, and check supply voltage from TCM => test step 1. Test Steps, 1 to 3
- Check transmission control module => DTC 65535, "Control Module Malfunctioning".
If one of the following messages is displayed:
Rapid data transfer HELP
L wire not switching to Ground
or:
Rapid data transfer HELP
L wire not switching to B+
or:
Rapid data transfer HELP
K wire not switching to Ground
or:
Rapid data transfer HELP
K wire not switching to B+
- Press "HELP" button to list possible malfunction causes.
After Repairing Malfunction:
- Once again insert "Transmission Electronics" address word 02, and press -Q- button to confirm input.
Indicated on display:
Rapid data transfer HELP
Select function XX
NOTES:
^ Press the "HELP" button for additional information.
^ After any particular program function has been completed, the VAG1551 scan tool will display "Select function XX."
VAG 1551 Scan Tool Functions:
If, after selecting a function, "Control module does not answer" appears in the display:
Rapid data transfer HELP
Select function XX
- Press "HELP" button to list possible malfunction causes.
- Check DLC connections according to wiring diagram.
- Check transmission control module => DTC 65535, "Control Module Malfunctioning".