Volkswagen New Beetle. Manual - part 1858

 

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Volkswagen New Beetle. Manual - part 1858

 

 

Fig. 16: Checking Camshaft Adjustment Valve Resistance (Beetle, GTI & Jetta - Engine Code AWV, 
AWW & AWP)
 
Courtesy of VOLKSWAGEN UNITED STATES, INC.

 

2003 Volkswagen New Beetle GLS 

2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:44:32 AM

Page 54 

© 2004 Mitchell Repair Information Company, LLC. 

Fig. 17: Identifying Test Points On 2-Pin Harness Connector 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

DTC P0030/16414, DTC P0031/16415 & DTC P0032/16416 

Code Definition 

z

DTC P0030/16414: HO2 Sensor (G39) Upstream TWC - Heating Open Circuit  

z

DTC P0031/16415: HO2 Sensor (G39) Upstream TWC - Heating Short To Ground  

z

DTC P0032/16416: HO2 Sensor (G39) Upstream TWC - Heating Short To B+  

NOTE:

If a test ends with ECM replacement. Before replacing ECM be certain that, all 
wiring, power and ground supplies are okay. See ENGINE PERFORMANCE in 
SYSTEM WIRING DIAGRAMS article in ELECTRICAL and ECM GROUND & 
VOLTAGE SUPPLY . 

 

2003 Volkswagen New Beetle GLS 

2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:44:32 AM

Page 55 

© 2004 Mitchell Repair Information Company, LLC. 

Test Requirements 

Ensure all fuses are okay, battery voltage is at least 11.5 volts and fuel pump relay is okay. Ensure all electrical 
accessories are off and A/C is off. Ensure engine is mechanically sound. Ensure no exhaust system leaks exist. 
Ensure engine coolant temperature is at least 176°F (80°C).  

Test Procedure 

1. Check air induction and secondary air injection system for leaks. If no air leaks are found, go to next step. 

If air leaks are found. Repair as necessary. After repairs, erase DTC memory. Verify repair. Test is 
complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE .  

2. Connect Scan Tool. See RETRIEVING DIAGNOSTIC TROUBLE CODES . Start engine and idle for 

two minutes. Following scan tool manufacturer's instructions, use scan tool to check upstream HO2S 
(G39) heater activation. Observe scan tool in upstream HO2S heater activation test mode. Heater 
actuation must switch, alternating from on to off. If HO2S heater remains in off mode, go to next step. If 
HO2S heater switches, alternating from on to off, go to next step, (further testing is needed).  

3. Turn off ignition. Raise vehicle and remove HO2 sensors protective cover and disconnect upstream 

HO2S (G39) harness connector (black 6-pin), see Fig. 19 . Go to next step. 

 

2003 Volkswagen New Beetle GLS 

2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:44:33 AM

Page 56 

© 2004 Mitchell Repair Information Company, LLC. 

Fig. 18: Locating & Identifying Heated Oxygen Sensors, Located At Firewall Behind Coolant Tank 
(Passat)
 
Courtesy of VOLKSWAGEN UNITED STATES, INC.

 

2003 Volkswagen New Beetle GLS 

2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:44:33 AM

Page 57 

© 2004 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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