Volkswagen New Beetle. Manual - part 793

 

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Volkswagen New Beetle. Manual - part 793

 

 

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

  

Indicated on display: 

z

Confirm entry with key Q. 

Fig. 204: V.A.G 1551 Scan Tool Display - Initiating On Board Diagnosis Test Mode (1 Of 35) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Read off control module version in V.A.G 1551 display.  

z

Press --> key.  

Indicated on display 

Fig. 205: V.A.G 1551 Scan Tool Display - Initiating On Board Diagnosis Test Mode (2 Of 35) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Press keys 0 and 3  

NOTE:

During the next work steps the ABS warning light -K47- flashes.

 

2003 Volkswagen New Beetle GLS 

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

  

Indicated on display 

Fig. 206: V.A.G 1551 Scan Tool Display - Initiating On Board Diagnosis Test Mode (3 Of 35) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Confirm entry with key Q. 

ABS hydraulic pump -V64- must run. 

Indicated on display 

Fig. 207: V.A.G 1551 Scan Tool Display - Initiating On Board Diagnosis Test Mode (4 Of 35) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Press --> key.  

Indicated on display 

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 208: V.A.G 1551 Scan Tool Display - Initiating On Board Diagnosis Test Mode (5 Of 35) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Operate brake pedal.  

z

Press --> key.  

Indicated on display 

Fig. 209: V.A.G 1551 Scan Tool Display - Initiating On Board Diagnosis Test Mode (6 Of 35) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Indicate to 2nd mechanic which wheel requires turning by hand. 

z

Press-> key.  

NOTE:

If the wheel does not lock, there is a possibility that there is a malfunction 
in the mechanical/hydraulic part of the brake system.

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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