With Manufacturer's Scan Tool
Camshaft Position (CMP) Sensor, Checking
NOTE: Only gold-plated terminals may be used to service the terminals in the Camshaft Position (CMP) Sensor connector.
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
- VAG 1526 Hand multimeter or VAG 1715 multimeter
- VAG 1594 adapter set
- VAG 1598/31 test box
- Electrical Wiring Diagrams
Test prerequisites
- The fuses must be OK.
- The battery voltage must be at least 11.5 V.
- All electrical accessories, e.g. lights and rear window heating must be switched off.
- If the vehicle is equipped with air conditioning, it must be turned off.
- Camshaft Position (CMP) Sensor malfunction detected by On Board Diagnostic (OBD)
Reading Diagnostic Trouble Codes.
Check sequence for inlet camshaft Camshaft Position (CMP) Sensor -G40-
- Pull 3-pin connector off Camshaft Position (CMP) Sensor -G40- -1-. -
NOTE: Mark connector and component before pulling connector off.
- Connect multimeter to measure voltage at terminals 1 (positive) and 3 (ground) of the Camshaft Position (CMP) Sensor connector using adapter cables from V.A.G 1594.
- Switch on ignition.
Specification: at least 4.5 V
- Switch off ignition.
If no voltage is present:
- Remove wiper arms and cowl panel:
- Connect VAG 1598/31 test box to control module wiring harness. The Engine Control Module (ECM) remains disconnected.
- Check wiring for open circuit between test box and connector referring to Electrical Wiring Diagrams.
terminal 1 and socket 98
terminal 2 and socket 86
terminal 3 and socket 108
Wire resistance: max. 1.5 ohms
- Additionally check wires for short to one another.
Specification: infinity ohms
If no wiring malfunction is detected and voltage was present between terminals 1 and 3:
- Replace Camshaft Position (CMP) Sensor -G40-, item 16.
- Check DTC memory, repair malfunctions if necessary and then erase DTC memory.
Reading Diagnostic Trouble Codes
- Read readiness code.
Monitors, Trips, Drive Cycles and Readiness Codes
If the DTC memory has been erased or the Engine Control Module (ECM) was disconnected from battery positive, the readiness code must be generated again.
Monitors, Trips, Drive Cycles and Readiness Codes
If no wiring malfunction is detected and no voltage was present between terminals 1 and 3:
- Replace Engine Control Module (ECM).
- Check DTC memory, repair malfunctions if necessary and then erase DTC memory.
Reading Diagnostic Trouble Codes
- Erase learned values and adapt Engine Control Module (ECM) again.
- Read readiness code. If the DTC memory has been erased or the Engine Control Module (ECM) was disconnected from battery positive, the readiness code must be generated again.
Monitors, Trips, Drive Cycles and Readiness Codes
Monitors, Trips, Drive Cycles and Readiness Codes
Check sequence for Camshaft Position (CMP) Sensor 2 -G163-
- Pull 3-pin connector -2- off Camshaft Position (CMP) Sensor 2 -G163-.
NOTE: Mark connector and component before pulling connector off.
- Connect multimeter to measure voltage at terminals 1 (positive) and 3 (ground) of Camshaft Position (CMP) Sensor connector using adapter cables from V.A.G 1594.
- Switch on ignition.
Specification: at least 4.5 V
- Switch off ignition.
If no voltage is present:
- Remove wiper arms and cowl panel:
- Connect VAG 1598/31 test box to control module wiring harness. The Engine Control Module (ECM) remains disconnected.
- Check wiring for open circuit between test box and connector referring to Electrical Wiring Diagrams.
terminal 1 and socket 98
terminal 2 and socket 87
terminal 3 and socket 108
Wire resistance: max. 1.5 ohms
- Additionally check wires for short to one another.
Specification: infinity ohms
If no wiring malfunction is detected and voltage was present between terminals 1 and 3:
- Replace Camshaft Position (CMP) Sensor 2 - G163-, item 13.
- Check DTC memory, repair malfunctions if necessary and then erase DTC memory.
Reading Diagnostic Trouble Codes
- Read readiness code. If the DTC memory has been erased or the Engine Control Module (ECM) was disconnected from battery positive, the readiness code must be generated again.
Monitors, Trips, Drive Cycles and Readiness Codes
Monitors, Trips, Drive Cycles and Readiness Codes
If no wiring malfunction is detected and no voltage was present between terminals 1 and 3:
- Replace Engine Control Module (ECM).
- Check DTC memory, repair malfunctions if necessary and then erase DTC memory.
Reading Diagnostic Trouble Codes
- Erase learned values and adapt Engine Control Module (ECM) again.
- Read readiness code. If the DTC memory has been erased or the Engine Control Module (ECM) was disconnected from battery positive, the readiness code must be generated again.
Monitors, Trips, Drive Cycles and Readiness Codes
Monitors, Trips, Drive Cycles and Readiness Codes