Work sequence

Connect VAG1551 /1552 (Connecting scan tool and selecting engine electronics control module → Scan Tool VAG1551 , connecting .)

Indicated on display:

Rapid data transfer HELP
Select function XX

Press buttons 0 and 4 to select "Basic setting" and confirm entry with Q button.

Indicated on display

Basic setting HELP
Input display group number XXX

Press button 0 three times to select "Display group number 0" and confirm entry with Q button.

Indicated on display: (1 - 10 = Display fields)

System in basic setting 0 →
1 2 3 4 5 6 7 8 9 10

Check coolant temperature in display field 7.

Specification: less than 73 (equates to 85 ° C)

Continue with check only when coolant temperature is attained.

The start of injection in display field 2 is dependent on the fuel temperature in display field 9.

Fig 1: Display Field Graph

Courtesy of VOLKSWAGEN UNITED STATES, INC.

A - Display field 2 start of injection

B - Display field 9 fuel temperature

C - Specified range for start of injection

Example:

The numerical value 90 in display field 9 - B - corresponds to a numerical value range of 34 to 73 in display field 2 - A -.

NOTE:

If the start of injection specifications are within zone - C - , no adjustment is required. After repairs e.g. removing and installing the injection pump or adjusting the timing then the start of injection is to be set to the mean valve (dashed line) of the specification zone - C -.

If the start of injection (timing) is outside the specification tolerances:

Remove connecting pipe between charge air cooler and intake manifold.
Remove upper toothed belt guard.

Fig 2: Injection Pump Sprocket Bolts & Hub Nut

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Loosen two injection pump sprocket securing bolts - 1 -.
Position 22 mm wrench onto hub nut - 2 - to counter-hold pump shaft.
Loosen 3rd injection pump sprocket bolt and turn pump shaft slightly:

To left = retards start of injection

To right = advances start of injection

NOTE:

DO NOT loosen the hub nut - 2 -. If nut - 2 - is loosened the injection pump basic setting will be altered and this cannot be reset with normal workshop equipment.

Version A: Securing bolts with chamfer on shaft and point -arrows-

Fig 3: Identifying Securing Bolts For Injection Pump Sprocket

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Tighten new injection pump sprocket securing bolts.

Tightening torque: 20 Nm

NOTE:

After dynamic test of start of injection, securing bolts must be tightened 90 ° (¹ /4 turn) further.
Because they are stretch bolts they must only be used once.

Version B: Securing bolts without chamfer on shaft and without point

Tighten old injection pump sprocket securing bolts.

Tightening torque: 25 Nm

NOTE:

Do not replace securing bolts.

Continuation for all versions

Observe value in field 2 and, if necessary, repeat adjustment until the displayed value stays at the mean value of specified range - C -.

Version A: Securing bolts with chamfer on shaft and point -arrows-

Fig 4: Identifying Securing Bolts For Injection Pump Sprocket

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Tighten new injection pump sprockets securing bolts ¹ /4 turn (90 ° ) further.

Continuation for all versions

Press the → button.
Press buttons 0 and 6 for the "End output" function and confirm input with the Q button.
Switch ignition off.
Install connecting pipe between charge air cooler and intake manifold.

Install upper toothed belt guard.
Check DTC memory and, if necessary, repair any malfunctions and then erase → Diagnostic Trouble Code (DTC) memory, checking and erasing .
If the DTC memory has been erased, the readiness code must be generated again → Readiness code, setting .