Volkswagen New Beetle. Manual - part 744

 

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Volkswagen New Beetle. Manual - part 744

 

 

z

Disconnect connector off brake light switch.  

z

Remove brake light switch by turning 45° to the left.  

z

Before installing, pull plunger fully out.  

z

Guide brake light switch through assembly opening and reinstall by pressing against the pedal and turning 
45° to the right. 

Brake pedal always remains in rest position. 

z

Install brake light switch connector.  

z

Check function of brake light.  

After adjusting brake light switch, make sure the brake pedal is in the end stop position (released 
position).
 

Fig. 289: Removing Brake Light Switch By Turning 45° To Left 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

DEFINITIONS 

These explanations concern this assembly group: Self-diagnosis for ABS. These definitions are not necessarily 
generally valid. 

ABS/EDL/ASR/ESP 

Anti-lock braking system, electronic differential lock, traction control system, electronic stability program. 

Display group number, see Read measured value block 

ASR (Traction control system) 

NOTE:

Remove brake light switch to adjust.

 

2003 Volkswagen New Beetle GLS 

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

  

Further information on this can be found in the appropriate Self-study program No. 115. 

Booster 

Brake servo 

Data bus 

Transportation of data. To do this the electrical signals are brought into a certain format (BUS). Further 
information on this can be found in Self-study programs No.180 and 186. 

Data bus low (high) 

The voltage used to transport the data is low (high). Further information on this can be found in self-study 
program no. 186. 

Speed sensor 

Sends speed signals to control module. 

EBD 

Electronic brake pressure distribution 

Forget-malfunction counter 

When a fault gets in the memory fault counter, after 50 vehicle starts, and this fault is not repeated again, the 
memory counter erases the fault. 

Self-diagnosis 

The capability of the control module: 

z

Recognise Diagnostic Trouble Codes (DTCs),  

z

React to DTCs,  

z

Store DTCs,  

and make them available in the measured value block. Further information on this can be found in Self-study 
program and test module instruction manual. 

Performing self-diagnosis 

Connecting the Scan Tool to be able to check the DTC memory. Further information on this can be found in 
Self-study program and test module instruction manual. 

Performing electrical check 

 

2003 Volkswagen New Beetle GLS 

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

  

A targeted check of the electronic components by performing certain measurements. 

ESP 

Electronic stabilization program 

ESP-Sensor Unit -G419-, vehicles from m.y. 12.01 

The sensor for transverse acceleration -G200-, and the sender for rotation rate -G202- are assembled together in 
a housing. 

Sender 1 for brake booster/sensor -2- for brake pressure -G201/-G214- 

Registers the pressure exerted by the driver and is required to control the pressure of the pre-charge pressure 
(booster). 

Sender for rotation rate -G202- 

Registers the rotational movement of the vehicle along the vertical axis relative to the speed of the vehicle. 

Steering angle sensor -G85- 

Used to determine the direction the driver desires. Data transfer to control module is via the data bus wiring. 

Sensor for transverse acceleration -G200- 

Used to register the speed through curves/bends and which side should be braked using the ESP. 

No communication 

There is no connection for exchanging information between the control modules. Further information on this 
can be found in Self-study program No. 180. 

Short to ground 

Current flows -incorrectly- to ground without supplying a consumer. 

Short to positive 

Current flows -incorrectly- to a live component without supplying a consumer. 

Trip switch 

The trip switch is located in the brake booster and is used by the control module to determine the braking 
desired by the driver which then leads to the switch-off of the brake pressure (booster) solenoid valve. 

Magnetic coil for brake pressure, in brake booster -N247- 

 

2003 Volkswagen New Beetle GLS 

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

  

The brake pressure (booster) solenoid valve is located in the brake booster and is used to provide the pressure 
required for the pre-charging (by increasing the suction pressure) for the ABS/ESP pump. 

Read measured value block 

The control module can transfer a considerable amount of test data. This test data delivers information on the 
operational condition of the system and/or sensors connected to it. In many cases the transferred test data 
supports fault finding and fault rectification. The test data has been summarized into single display groups 
because all the information cannot be evaluated at the same time. The information can be selected via display 
group numbers. 

EBC 

Engine braking control 

Program card version 

Always use the most up-to-date program card. Further information can be found in the test module operating 
instructions. 

Sporadic 

Happens occasionally 

Infinity ohm 

The resistance is infinite, open circuit. 

"INFINITY" Ohms 

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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