Volkswagen New Beetle. Manual - part 727

 

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Volkswagen New Beetle. Manual - part 727

 

 

Fig. 200: V.A.G 1551 Scan Tool Display - Checking Brake Pressure Sensor1 (1 Of 2) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Indicated on display: e.g. (vehicle stationary) 

Press C key for the next display group number entry. 

If the --> key is pressed, keys 0 and 8 for work sequence "Read measured value block" must be pressed again 
afterward to regain entry. 

Fig. 201: V.A.G 1551 Scan Tool Display - Checking Brake Pressure Sensor1 (2 Of 2) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

DISPLAY GROUP NUMBER: 005 

Read measured value block

5 -->

Display group number: 005

-1.06 bar

 

 

 

<- - Indicated on display (example)

 

 

 

 

Vacant

 

 

 

Vacant

 

 

Vacant

 

Brake pressure sensor 

z

Specification when brake pedal is not depressed: +/- 7 bar  

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES On Board Diagnostic (OBD) - New Beetle

  

Checking data bus wiring 

Display group number 125 

z

Press keys 1, 2 and 5  

z

Confirm entry with key Q.  

z

There are always 4 display zones -arrows- in the measured value block. Decoding the individual values in 
display zones 1 to 4 can be read-off from the following tables. 

Fig. 202: V.A.G 1551 Scan Tool Display - Checking Data Bus Wiring (1 Of 2) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Indicated on display: (when vehicle stationary) 

Press C key for the next display group number entry. 

If the --> key is pressed, keys 0 and 8 for work sequence "Read measured value block" must be pressed again 
afterwards to regain entry. 

z

Perform electrical check from, see ELECTRICAL TEST OF MARK 60, 
VEHICLES FROM M.Y. 10.00
  

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES On Board Diagnostic (OBD) - New Beetle

  

Fig. 203: V.A.G 1551 Scan Tool Display - Checking Data Bus Wiring (2 Of 2) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

DISPLAY GROUP NUMBER: 125 

OUTPUT DIAGNOSTIC TEST MODE (DTM) 

The pump motor and the correct functioning of the hydraulic circuits (allocation of brake lines to wheel 

Read measured value block

125 -->

Display group number: 125

Engine 1

St. ang. 1

  Gear. 1

<- - Indicated on display (example)

 

 

 

 

Data bus for Transmission

(1)

z

1 --> Data bus connection is available. 

z

0 --> Data bus connection is not available /

()

 

 

  Vacant

 

 

Data bus for steering angle 

z

1 --> Data bus connection is available.  

z

0 --> Data bus connection is not available 

()

 

 

 

Data bus for engine 

z

1 --> Data bus connection is available.  

z

0 --> Data bus connection is not available 

(2)

 

 

(1)

Vehicles with an automatic transmission only, see check for relevant transmission code.

(2)

Data bus connection is interrupted (open circuit) or data bus wiring is interchanged. See wiring 
diagram.

NOTE:

z

All functions which could previously be performed with V.A.G 1551 can 
now also be carried out with the tester VAS 5051.  

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES On Board Diagnostic (OBD) - New Beetle

  

cylinders and function of valves) can be checked via the final control diagnosis for interchange or leaks.

Example: 

Indicated on V.A.G 1551 display during final control diagnosis: 

(e.g. front left wheel, FL) 

FRONT LEFT WHEEL 

IFL = Inlet valve Front Left 

VBAT = Voltage Battery; Voltage at valve 

OFL = Outlet valve Front Left 

0V = 0 Volt; No voltage at valve 

Locked/free = Wheel condition; must be checked by 2nd mechanic if required 

WHEEL CONDITION 

Hydr-P = Hydraulic pump 

z

Connect V.A.G 1551 scan tool.  

z

Switch ignition on.  

z

Press key -1- for "Rapid data transfer" operating mode.  

z

Select brake electronics control module (address word 03); see LIST OF SELECTABLE 
FUNCTIONS
 .  

NOTE:

z

The vehicle must be raised until all wheels are free to turn. (2nd mechanic 
required to rotate wheels)  

z

The -C- key can be used to exit the test sequence at any time.  

z

After depressing the brake pedal several times the vacuum in the brake 
booster will be exhausted. Therefore more pressure must be applied to the 
brake pedal in order to attain the same fluid pressure in brake system, as 
that attained with vacuum.  

z

When vacuum in brake booster is exhausted it can happen that the wheels 
do not lock; start engine and build-up vacuum in brake booster.  

Final control diagnosis - ->
IFL: VBAT OFL: 0V Wheel FL locked

Final control diagnosis - ->
EDL valves/Hyd-P: VBAT Wheel FL/FR locked

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES On Board Diagnostic (OBD) - New Beetle

  

 

 

 

 

 

 

 

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