Volkswagen New Beetle. Manual - part 1801

 

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Volkswagen New Beetle. Manual - part 1801

 

 

ELECTRICAL.  

ON-BOARD DIAGNOSTICS 

Misfire 

A malfunction that causes a misfire during vehicle operation causes MIL to flash in equally timed increments. 
This is a malfunction (e.g. misfire) that may cause catalytic converter damage. If MIL flashes in equally timed 
increments during vehicle operation, cause of malfunction must be determined. See DTC IDENTIFICATION 
table.  

Hard Failures 

Hard failures cause MIL to illuminate and remain on until problem is repaired. If MIL comes on and remains on 
during vehicle operation, cause of malfunction must be determined. See DTC IDENTIFICATION table. In 
addition EPC malfunctions are indicated by an EPC warning light and MIL in instrument cluster. See Fig. 2 and 
Fig. 3 under MALFUNCTION INDICATOR LIGHT (K83) . For most sensors, if a sensor fails, ECM will 
use a substitute value in its calculations to continue engine operation. In this condition, commonly known as 
limp-in or limp-home mode, the vehicle runs but driveability will not be optimum.  

The Engine Speed (RPM) sensor (G28) is a speed and reference mark sensor. The engine will not start if there 
is no engine speed (RPM) signal. If the engine speed (RPM) signal fails when the engine is running, it will 
cause the engine to stall immediately.  

Sporadic Malfunctions (Intermittent Failures) 

Sporadic malfunctions (intermittent failures) may cause Malfunction Indicator Light (MIL) to flicker or 
illuminate and go out after the intermittent fault goes away. DTC will be retained in ECM memory. Sporadic 
malfunctions (intermittent failures) may be caused by a sensor, connector or wiring related problems.  

MALFUNCTION INDICATOR LIGHT (K83) 

CAUTION: A Malfunction Indicator Light (MIL) flashing in equally timed increments 

during vehicle operation indicates malfunction(s) causing a misfire. 
Vehicle must not be driven at full power and must be diagnosed and 
repaired before catalytic converter damage occurs. 

NOTE:

When using Scan Tool VAG 1551/1552 or VAS 5051/5052, malfunctions which 
only occur sporadically (intermittently) will have the addendum sporadic 
(intermittent) malfunction on the print out and will be indicated on the display 
by the addendum /SP. Cause of sporadic malfunctions can be e.g. a loose 
contact or a intermittently open circuit. If a sporadic malfunction does not occur 
again within 40 warm-up phases, sporadic DTC(s) will be erased from ECM 
memory. A warm-up phase is, engine started with coolant temperature below 
122°F (50°C), switched off at above 162°F (72°C). 

 

2003 Volkswagen New Beetle GLS 

2001-2003 ENGINE PERFORMANCE Self-Diagnostics - 2.0L - Beetle, Golf & Jetta (Engine Codes AVH & AZG)

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:49:53 AM

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All models are equipped with a Malfunction Indicator Light (MIL). MIL illuminates when a system failure has 
been detected and DTC has been stored in Engine Control Module (ECM) memory. For location of MIL, see 
Fig. 2 and Fig. 4 .  

MIL and Electronic Power Control (EPC) warning light both illuminate when a system failure has been detected 
in the EPC system. DTC is also stored in ECM memory.  

NOTE:

Instrument Cluster Control Module (J285) and Can Data Bus OBD Interface 
(J533) are integral parts of the instrument cluster. If instrument cluster is 
replaced, Can Data Bus OBD Interface (J533) must be coded. See CAN DATA 
BUS OBD INTERFACE (J533) CODING . 

CAUTION: A Malfunction Indicator Light (MIL) flashing in equally timed increments 

during vehicle operation indicates malfunction(s) causing a misfire. 
Vehicle must not be driven at full power and must be diagnosed and 
repaired before catalytic converter damage occurs. 

 

2003 Volkswagen New Beetle GLS 

2001-2003 ENGINE PERFORMANCE Self-Diagnostics - 2.0L - Beetle, Golf & Jetta (Engine Codes AVH & AZG)

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:49:53 AM

Page 5 

© 2004 Mitchell Repair Information Company, LLC. 

Fig. 2: Locating Malfunction Indicator Light & Electronic Power Control Warning Light (Golf & Jetta)
Courtesy of VOLKSWAGEN UNITED STATES, INC.
 

Fig. 3: Locating Electronic Power Control Warning Light (Beetle) 
Courtesy of VOLKSWAGEN UNITED STATES, INC.

 

2003 Volkswagen New Beetle GLS 

2001-2003 ENGINE PERFORMANCE Self-Diagnostics - 2.0L - Beetle, Golf & Jetta (Engine Codes AVH & AZG)

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:49:53 AM

Page 6 

© 2004 Mitchell Repair Information Company, LLC. 

Fig. 4: Locating Malfunction Indicator Light (Beetle) 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

MALFUNCTION INDICATOR LIGHT CHECK 

Turn ignition on, with engine off. If MIL does not illuminate, check for codes. See RETRIEVING 
DIAGNOSTIC TROUBLE CODES 
, repair as necessary. If no DTCs are present, check wiring and 
instrument cluster for MIL. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in 
ELECTRICAL.  

If MIL is illuminated with engine running, turn engine off. Check for codes. See RETRIEVING 
DIAGNOSTIC TROUBLE CODES 
, repair as necessary. If no DTCs are present, check wiring and 
instrument cluster MIL. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in 
ELECTRICAL.  

NOTE:

Instrument Cluster Control Module (J285) and Can Data Bus OBD Interface 
(J533) are integral parts of the instrument cluster. If instrument cluster is 
replaced, Can Data Bus OBD Interface (J533) must be coded. See CAN DATA 
BUS OBD INTERFACE (J533) CODING . 

 

2003 Volkswagen New Beetle GLS 

2001-2003 ENGINE PERFORMANCE Self-Diagnostics - 2.0L - Beetle, Golf & Jetta (Engine Codes AVH & AZG)

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:49:53 AM

Page 7 

© 2004 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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