Camshaft Position (CMP) Sensor 1 -G40-, Checking

Camshaft Position (CMP) Sensor -G40-, Checking


NOTE:
- Camshaft Position (CMP) sensor -G40- is located on the front of the right cylinder head (bank 1).
- Checking -G163-. Camshaft Position (CMP) Sensor 2 -G163-, Checking


Required special tools and test equipment
- VAG1598/22 test box
- Multimeter US1119 (Fluke 83 or equivalent)
- VW1594 connector test kit
- Wiring diagrams

Checking
- Disconnect 3-pin harness connector from Camshaft Position (CMP) sensor -G40-.







- Connect multimeter US1119 (Fluke 83 or equivalent) to measure voltage across CMP connector terminals 1 (B+) and 3 (Ground), using adapters from VW1594 connector test kit.
- Switch ignition on.
- Measure voltage between terminals 1 and 3.
Specified value: 9-14.5 volts
- Switch ignition off.

If voltage is OK:
- Connect VAG1598/22 test box to Motronic ECM harness connector. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1598/22 Test Box" Testing and Inspection
- Check wiring for open circuit between ECM/test box and 3-pin harness connector, according to wiring diagram.
- Connector terminal 1 to ECM/test box socket 11
- Connector terminal 2 to ECM/test box socket 44
- Connector terminal 3 to ECM/test box socket 14
- Specified value: max. 1.5 Ohms







- Check wiring for short circuit between ECM/test box and 3-pin harness connector, according to wiring diagram.
- Connector terminal 3 to ECM/test box socket 44
- Connector terminal 3 to ECM/test box socket 11
- Connector terminal 2 to ECM/test box socket 11
- Specified value: Infinity Ohms

If wiring is OK (and voltage across terminals 1 and 3 is OK):
- Replace Camshaft Position (CMP) sensor -G40-.

If wiring is OK (but still no voltage across terminals 1 and 3):
- Replace Motronic ECM -J220-.
- Carry out adaptation of throttle valve control module to ECM.
- Check readiness code. Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Checking Readiness Code" Testing and Inspection
If Diagnostic Trouble Code (DTC) memory has been erased, or ECM has been disconnected, generate new readiness code. Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Generating Readiness Code" Testing and Inspection