Camshaft Position Sensors 2 and 4, Checking

Camshaft Position Sensors 2 and 4, Checking

The following procedure is used to diagnose Camshaft Position (CMP) Sensor 2 G163 and Camshaft Position (CMP) Sensor 4 G301 which are controlled by Engine Control Module (ECM) 2 J624.

NOTE: Use only gold-plated when servicing the electrical harness connector terminals of the Camshaft Position (CMP) Sensor 2 G163 and Camshaft Position (CMP) Sensor 4 G301.

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

Test requirements
- The Engine Control Module (ECM) 2 J624 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. General Diagnosis

Start diagnosis







- Disconnect the Camshaft Position (CMP) Sensor 2 G163 electrical harness connector - 3 -.

or







- Disconnect the Camshaft Position (CMP) Sensor 4 G301 electrical harness connector - 6 -.
- Switch the ignition on.







- Using a Multimeter, Check the Camshaft Position (CMP) Sensor 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.

If the manufacturers test box is not being used. Perform the following step.
- Remove the Engine Control Module (ECM) 2 J624.







- Using a Multimeter, Check the Camshaft Position (CMP) Sensor electrical harness connector to the Engine Control Module (ECM) 2 J624 electrical harness connector T60a for an open circuit.

Camshaft Position (CMP) Motronic Engine Control Module (ECM) 2
Sensor 2 G163 electrical J624 electrical harness connector T60a
harness connector terminals terminals or test box sockets
1 26
2 44
3 52

Camshaft Position (CMP) Motronic Engine Control Module (ECM) 2
Sensor 4 G301 electrical J624 electrical harness connector T60a
harness connector terminals terminals or test box sockets
1 37
2 59
3 52

Specified value: 1.5 Ohms 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 faulty Camshaft Position (CMP) Sensor 2 G163 or Camshaft Position (CMP) Sensor 4 G301.

If no malfunction is found in the wiring and voltage supply was not OK:
- Replace the Engine Control Module (ECM) 2 J624.

Final procedures
After repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Diagnostic Mode 03 - Read DTC Memory
2. If necessary, erase the DTC memory. Diagnostic Mode 04 - Erase DTC Memory
3. If the DTC memory was erased, generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

- End of diagnosis.