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HOMESERVICE MANUALSAUDI2005A6 3.2 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 13 (3.0L - ENGINE CONTROLS - FUEL INJECTION & IGNITION, ENGINE CODE(S): AVK, BGN)28 IGNITION/GLOW PLUG SYSTEMIGNITION SYSTEM, CHECKINGCAMSHAFT POSITION (CMP) SENSOR, CHECKINGNOTES
2005 Audi A6 3.2 T

Camshaft Position (CMP) sensor, checking: Notes

2005 Audi A6 3.2 TSECTION Notes
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Special Tools - Camshaft Position (CMP) Sensor, Checking
GW00015444Courtesy of VOLKSWAGEN UNITED STATES, INC.

Special tools and equipment 

  • VAG1526 A
  • VAG1527 B
  • VAG1594 A
  • VAG1598/31
  • VAS5051 with VAS5051/1

Installation location. Refer to Component locations, overview 

NOTE:
Fig 2: Removing Coolant Hoses
GW00017588Courtesy of VOLKSWAGEN UNITED STATES, INC.

To gain access to the connectors on cylinder bank 2 (left), you must remove the cover on left of engine compartment, disconnect cable to coolant shortage indicator switch at bottom of expansion tank, remove screw (arrow) for coolant expansion tank and lay aside. Coolant hoses -1 to 3- do not have to be disconnected.

Checking actuation 

Fig 3: Connecting Voltage Tester VAG1527 B With Measuring Probes And Plug-In Adapters From VAG1594 A Between Terminal 2 (CMP Sensor Signal) And Terminal 1 (Positive)
GW00018735Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Connect voltage tester VAG1527 B with measuring probes and plug-in adapters from VAG1594 A between terminal 2 (CMP sensor signal) and terminal 1 (positive); connector remains plugged in.
NOTE: Receptacles are numbered accordingly on the back of the connector.
  • Operate starter for a few seconds.
  • LED should flash.
NOTE: Voltage testers with a low current consumption continue to glow faintly between actuation from the engine control module (rather than extinguishing completely) and become much brighter when actuated.

If LED does not flash:

Checking power supply 

Fig 4: Disconnecting Electrical Harness Connectors At Camshaft Position (CMP) Sensor -G40- And Camshaft Position (CMP) Sensor 3 -G300-
GW00017715Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Disconnect connectors -1- and -2- on Camshaft Position (CMP) sensor -G40- and Camshaft Position (CMP) sensor 3 -G300-.
Fig 5: Disconnecting Electrical Harness Connectors And At Camshaft Position (CMP) Sensor 2 -G163- And Camshaft Position (CMP) Sensor 4 -G301-
GW00017708Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Disconnect connectors -1- and -2- on Camshaft Position (CMP) sensor 2 -G163- and Camshaft Position (CMP) sensor 4 -G301-.
Fig 6: Identifying 3-Pin Connector Terminals 1 & 3
GW00000673Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Connect multimeter as follows to measure voltage:
Connector 
Terminal 		 Measure to 
1 Engine Ground
  • Switch ignition on.
  • Specified value: approx. 5 V

Checking signal wire 

Fig 7: Identifying 3-Pin Connector Terminals 1 & 3
GW00000673Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Connect multimeter as follows to measure voltage:
Connector 
Terminal 		 Measure to 
2 Engine ground
  • Switch ignition on.
  • Specified value: approx. battery voltage

Checking ground wire 

Fig 8: Identifying 3-Pin Connector Terminals 1 & 3
GW00000673Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Connect multimeter as follows to measure voltage:
Connector 
Terminal 		 Measure to 
3 Battery positive
  • Specified value: approx. 10 V
  • Repair any open/short circuit as necessary.

If the specified values are all achieved and the LED test light does not flash (measured between terminals 1 and 2 with starter connector attached),

  • Install a new CMP sensor.

If the specified values are not obtained:

Checking wiring between CMP sensor and engine control module. 

  • Connect test box VAG1598/31 to wiring harness for engine control module; do not connect engine control module. Refer to Wiring and component check with test box VAG 1598/31 .
  • Check for open circuit and short to positive or ground in following wiring connections:
Fig 9: Identifying 3-Pin Connector Terminals 1 & 3
GW00000673Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Camshaft Position (CMP) sensor -G40- (Bank 1)
Connector 
Terminal 		 Test box VAG1598/31 
Socket 
1 (positive) 98
2 (signal) 87
3 (ground) 108
  • Camshaft Position (CMP) sensor 2 -G163- (Bank 2)
Connector 
Terminal 		 Test box VAG1598/31 
Socket 
1 (positive) 98
2 (signal) 86
3 (ground) 108
Fig 10: Identifying 3-Pin Connector Terminals 1 & 3
GW00000673Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Camshaft Position (CMP) sensor 3 -G300- (Bank 1)
Connector 
Terminal 		 Test box VAG 1598/31 
Socket 
1 (positive) 98
2 (signal) 81
3 (ground) 108
  • Camshaft Position (CMP) sensor 4 -G301- (Bank 2)
Connector 
Terminal 		 Test box VAG 1598/31 
Socket 
1 (positive) 98
2 (signal) 54
3 (ground) 108
  • Repair any open/short circuit as necessary.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.