Check Camshaft Position (CMP) sensor: Notes
Recommended special tools and equipment
- VAG1526A hand multimeter
- V.A.G 1527 B Voltage Tester
- VAG1594A connector test kit
- VAG1598/31 test box
Component location. See OVERVIEW OF COMPONENT LOCATIONS .
The Camshaft Position (CMP) sensor provides the ignition position for cylinder 1.
During a failure, knock control is switched off and the ignition angle is retarded slightly since a cylinder allocation is no longer possible.
Engine will continue to run without Camshaft Position (CMP) sensor signal and can also be restarted:
- When a malfunction is recognized, the Engine Control Module (ECM) initiates one ignition spark per cylinder for each crankshaft rotation.
- The offset of one engine rotation will have no noticeable effect on the injection. Instead of occurring with intake valves open, injection will be "advanced" (in front of closed intake valve). This has only a minor effect on the quality of the mixture preparation.
NOTE:
- Camshaft Position (CMP) Sensor 2 -G40- is located at front of right cylinder head (bank 1).
- Camshaft Position (CMP) Sensor -G163- is located at rear of left cylinder head (bank 2). To reach the harness connector, the line to Engine Coolant Level (ECL) Warning Switch at bottom on reservoir must be disconnected, bolts -arrows- of coolant reservoir must be unscrewed and set it aside. Coolant hoses -1- and -2- remain connected.