With Generic Scan Tool

Camshaft Position (CMP) Sensor G40 Engine codes AWP, AWW
Camshaft Position (CMP) Sensor 2 G163 Engine code AWD, checking

Note:
- Use only gold-plated terminals when servicing terminals in harness connector of Camshaft Position (CMP) Sensor G40 or Camshaft Position (CMP) Sensor 2 G163 .

Special tools, testers and auxiliary items required
- Multimeter
- Wiring diagram

Test requirements
- The Motronic Engine Control Module (ECM) J220 fuses OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.

Test procedure
- Perform a preliminary check to verify the customers complaint. Service and Repair

Start diagnosis






- Disconnect the Camshaft Position (CMP) Sensor G40 or Camshaft Position (CMP) Sensor 2 G163 electrical harness connector - 1 - AWD shown, AWP, AWW similar.

- Switch the ignition on.






- Using a Multimeter, Check the Camshaft Position (CMP) Sensor G40 or Camshaft Position (CMP) Sensor 2 G163 electrical harness connector terminals 1 to 3 for voltage.

Specified value: about 5.0 V

- Switch the ignition off.

If the specification was not obtained:

Checking wiring

If the manufacturers test box is being used. Perform the following step.

- Install the test box Test Box 105 Pin VAG1598/31.

If the manufacturers test box is not being used. Perform the following step.

- Remove the Motronic Engine Control Module (ECM) J220. Service and Repair






- Using a Multimeter, Check the Camshaft Position (CMP) Sensor G40 electrical harness connector to the Motronic Engine Control Module (ECM) electrical harness connector T121 for an open circuit.






Specified value: 1.5 Max.

If the specified value was not obtained:

- Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

- Check the wiring connection for damage, corrosion, lose or broken terminals.

- If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK:

- Replace the Camshaft Position (CMP) Sensor G40.

- Erase the DTC memory. Diagnostic Mode 4: Reset/Erase Diagnostic Data

- Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

- End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:

- Replace the MFI Engine Control Module (ECM) J220. Service and Repair

- Assembly is performed in the reverse of the removal.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory.
2. If necessary, erase the DTC memory.
3. If the DTC memory was erased, generate readiness code.

End diagnosis