Camshaft Position (CMP) sensor -G40-, checking: 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: 9.0 to 14.5 volts
- Switch ignition off.
If voltage is OK:
- Connect VAG1598/22 test box to Motronic ECM harness connector. See VAG1598/22 TEST BOX, CONNECTING .
- 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 Ω
- 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: INIFINITY Ω
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-. See ENGINE CONTROL MODULE (ECM) (WITHOUT METAL ANTI-THEFT HOUSING), REMOVING AND INSTALLING .
- Perform adaptation of throttle valve control module to ECM. See THROTTLE VALVE CONTROL MODULE, ADAPTATION TO ENGINE CONTROL MODULE (ECM) .
- Check readiness code. See READINESS CODE .
- If Diagnostic Trouble Code (DTC) memory has been erased, or ECM has been disconnected, generate new readiness code. See READINESS CODE, CHECKING .