Volkswagen New Beetle. Manual - part 1514

z

Battery voltage must be at least 11.5 V  

z

Camshaft Position (CMP) sensor must be OK, checking, see CAMSHAFT POSITION (CMP) 
SENSOR -G40-, CHECKING  

z

Engine speed sensor must be OK, checking, see ENGINE SPEED (RPM) SENSOR -G28-, 
CHECKING  

Test sequence 

z

Disconnect 4-pin connector -1- off power output stage for ignition coils (arrow). 

Fig. 9: Disconnecting Ignition Coil Power Output Stage 4-Pin Connector 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Checking voltage supply 

z

Using multimeter and adapter cables from V.A.G 1594 measure supply voltage between contacts 1 + 2 
and 1 + 4 of disconnected connector.  

z

Switch on ignition. 

Specification: Min. 11.5 V 

z

Switch off ignition. 

NOTE:

Ignition coils and final power output stages are one component and cannot be 
replaced individually.

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Ignition-Glow Plug System, 1.8L APH - New Beetle

  

Fig. 10: Identifying Ignition Coil Power Output Stage 4-Pin Connector Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

If no voltage is present: 

z

Check wire between 4 -pin connector contact 2 and relay plate for open circuit according to wiring 
diagram. 

Wire resistance: max. 1.5 ohm 

Fig. 11: Identifying Ignition Coil Power Output Stage 4-Pin Connector Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Check wiring between 4 -pin connector and Ground (GND) for open circuit according to wiring diagram. 

z

Terminal 2 and Ground (GND)  

z

Terminal 4 and Ground (GND)  

Wire resistance: max. 1.5 ohm 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Ignition-Glow Plug System, 1.8L APH - New Beetle

  

If there is no malfunction in the supply voltage:

z

Check activation, see CHECKING ACTIVATION .  

Checking activation 

z

Pull fuse No. 32 out of fuse holder. 

Fig. 12: Identifying Fuses 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Connect diode test lamp V.A.G 1527 with adapter cables from V.A.G 1594 to contacts of disconnected 
connector 

Contacts 2 + 3 

WARNING:

During the following test do not touch the connecting parts of the ignition 
coils or test cables.

NOTE:

Removing fuse 32 interrupts the voltage supply to the injectors. Fuse 
holder is located behind access panel at far left end of dash.

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Ignition-Glow Plug System, 1.8L APH - New Beetle

  

Fig. 13: Identifying Ignition Coil Power Output Stage 4-Pin Connector Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Operate starter and check ignition signal from engine control module. 

LED must flicker 

z

Switch off ignition.  

When the LED flickers and the supply voltage is OK: 

z

Replace relevant ignition coil with power output stage, see item 2 .  

z

Check DTC memory, if necessary, repair any malfunctions and then erase DTC memory, see 
DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING .  

z

Read readiness code, see READINESS CODE, DISPLAYING . If DTC memory has been erased or 
engine control module was disconnected from permanent positive, readiness code must be generated 
again, see READINESS CODE, GENERATING . 

If LED does not flicker: 

z

Check wiring, see CHECKING WIRING .  

Checking wiring 

z

Remove inner plenum chamber cover, left: 

See PLENUM CHAMBER INNER COVER, REMOVING AND INSTALLING 

z

Connect test box V.A.G 1598/31 to control module wiring harness. Engine control module is not 
connected by this action. 

Fig. 14: Connecting Test Box V.A.G 1598/31

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Ignition-Glow Plug System, 1.8L APH - New Beetle