Camshaft Position Sensors, Checking

Camshaft Position Sensor, Checking

Camshaft Position Sensor

The following procedure is used to diagnose Camshaft Position (CMP) Sensor (G40) which is controlled by Motronic Engine Control Module (ECM) (J623).

• Use only gold-plated when servicing the electrical harness connector terminals of the Camshaft Position (CMP) Sensor (G40).

Special tools, testers and auxiliary items required

• Multimeter.

• Wiring diagram.

Test requirements

• The Motronic Engine Control Module (ECM) (J623) 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.

Procedure

- Disconnect the Camshaft Position (CMP) Sensor (G40) electrical harness connector - 3 -.

- Switch the ignition on.

- Using a Multimeter, Check the Camshaft Position (CMP) Sensor (G40) 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 Motronic Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Removing and Installing ] Engine Control Module, Removing and Installing.

- Using a Multimeter, Check the Camshaft Position (CMP) Sensor (G40) electrical harness connector to the Motronic Engine Control Module (ECM) (J623) electrical harness connector T60a for an open circuit.

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 Camshaft Position (CMP) Sensor (G40).

If no malfunction is found in the wiring and voltage supply was not OK:

- Replace the Motronic Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Removing and Installing ] Engine Control Module, Removing and Installing.

Assembly is performed in the reverse order of removal.

Final procedures

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

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.

- End of diagnosis.

Camshaft Position Sensor 3

The following procedure is used to diagnose Camshaft Position (CMP) Sensor 3 (G300) which is controlled by Motronic Engine Control Module (ECM) (J623).

• Use only gold-plated when servicing the electrical harness connector terminals of the Camshaft Position (CMP) Sensor 3 (G300).

Special tools, testers and auxiliary items required

• Multimeter.

• Wiring diagram.

Test requirements

• The Motronic Engine Control Module (ECM) (J623) 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.

Procedure

- Disconnect the Camshaft Position (CMP) Sensor 3 (G300) electrical harness connector - 4 -.

- Switch the ignition on.

- Using a Multimeter, Check the Camshaft Position (CMP) Sensor 3 (G300) 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 Motronic Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Removing and Installing ] Engine Control Module, Removing and Installing.

- Using a Multimeter, Check the Camshaft Position (CMP) Sensor 3 (G300) electrical harness connector to the Motronic Engine Control Module (ECM) (J623) electrical harness connector T60a for an open circuit.

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 Camshaft Position (CMP) Sensor 3 (G300).

If no malfunction is found in the wiring and voltage supply was not OK:

- Replace the Motronic Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Removing and Installing ] Engine Control Module, Removing and Installing.

Assembly is performed in the reverse order of removal.

Final procedures

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

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.

- End of diagnosis.

Camshaft Position Sensor 2

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

• Use only gold-plated when servicing the electrical harness connector terminals of the Camshaft Position (CMP) Sensor 2 (G163).

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.

Procedure

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

- Switch the ignition on.

- Using a Multimeter, Check the 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.

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

- Remove the Engine Control Module (ECM) 2 (J624). Refer to => [ Engine Control Module, Removing and Installing ] Engine Control Module, Removing and Installing.

- Using a Multimeter, check the Camshaft Position (CMP) Sensor 2 (G163) electrical harness connector to the Engine Control Module (ECM) 2 (J624) electrical harness connector T60b for an open circuit.

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 Camshaft Position (CMP) Sensor 2 (G163).

If no malfunction is found in the wiring and voltage supply was not OK:

- Replace the Engine Control Module (ECM) 2 (J624). Refer to => [ Engine Control Module, Removing and Installing ] Engine Control Module, Removing and Installing.

Assembly is performed in the reverse order of removal.

Final procedures

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

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.

- End of diagnosis.

Camshaft Position Sensor 4

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

• Use only gold-plated when servicing the electrical harness connector terminals of 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.

Procedure

- Disconnect the Camshaft Position (CMP) Sensor 4 (G301) electrical harness connector - 1 -.

- Switch the ignition on.

- Using a Multimeter, Check the Camshaft Position (CMP) Sensor 4 (G301) 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). Refer to => [ Engine Control Module, Removing and Installing ] Engine Control Module, Removing and Installing.

- Using a Multimeter, Check the Camshaft Position (CMP) Sensor 4 (G301) electrical harness connector to the Engine Control Module (ECM) 2 (J624) electrical harness connector T60b for an open circuit.