Faulty Signal. Permanent Fault

Checking Ground Lead
- Ignition off.
- Wait for approx. 150 seconds (cars with immobilizer 245 seconds).
- Disconnect the camshaft position (CMP) sensor.
- Connect an ohmmeter between the camshaft position sensor connector 1 (engine control module (ECM) side) and ground.
- The ohmmeter should read approx. 0 ohms.

If reading is OK:
^ Proceed to Checking Power Cable section below.

If reading is incorrect:
^ Proceed to test step below.





Checking The Engine Control Module Connector
- Ignition off.
- Camshaft position sensor disconnected.
- Check engine control module connector for contact resistance and oxidation.
- Engine control module connected.
- Connect an ohmmeter between the camshaft position sensor connector 1 (engine control module side) and ground.
- The ohmmeter should read approx. 0 ohms.

If reading is OK:
^ The diagnostic trouble code (DTC) was caused by poor contact in the engine control module connector.
^ Then proceed to Verification section below.

If reading is incorrect:
^ Check cable between camshaft position sensor terminal 1 and engine control module # A18 for an open-circuit.
^ Then proceed to Verification section below.





Checking Power Cable
- Ignition on.
- Camshaft position sensor disconnected.
- Connect a voltmeter between the camshaft position sensor connector 3 (engine control module side) and ground.
- The voltmeter should read battery voltage.

If reading is OK:
^ Proceed to Checking Signal Cable section below.

If reading is incorrect:
^ Proceed to test step below.





Checking The Engine Control Module Connector
- Ignition off.
- Camshaft position sensor disconnected.
- Check engine control module connector for contact resistance and oxidation.
- Engine control module connected.
- Ignition on.
- Connect a voltmeter between the camshaft position sensor connector 3 (engine control module side) and ground.
- The voltmeter should read battery voltage.

If reading is OK:
^ The diagnostic trouble code was caused by poor contact in the engine control module connector.
^ Then proceed to Verification section below.

If reading is incorrect:
^ Check cable between camshaft position sensor terminal 3 and engine control module # A36 for an open-circuit.
^ Then proceed to Verification section below.





Checking Signal Cable
- Ignition on.
- Camshaft position sensor disconnected.
- Connect a voltmeter between the camshaft position sensor connector 2 (engine control module side) and ground.
- The voltmeter should read battery voltage.

If reading is OK:
^ Proceed to test step below.

If reading is incorrect:
^ Proceed to Checking Signal Cable Resistance to Ground section below.





Checking The Signal Cable Voltage
- Ignition on.
- Camshaft position sensor disconnected.
- Connect a test light between camshaft position connector terminal 2 (engine control module side) and ground.
- Does the test light light up?

Yes:
^ Check cable between the camshaft position sensor terminal 2 and engine control module # A21 for a short-circuit to supply voltage.
^ Then proceed to Verification section below.

No:
^ Proceed to Check Of The Camshaft Position Sensor section below.





Checking Signal Cable Resistance to Ground
- Ignition off.
- Wait for approx. 150 seconds (cars with immobilizer 245 seconds).
- Camshaft position sensor disconnected.
- Connect an ohmmeter between the camshaft position sensor connector 2 (engine control module side) and ground.
- Is resistance Infinite?

Yes:
^ Proceed to test step below.

No:
^ Check cable between the camshaft position sensor terminal 2 and engine control module # A21 for a short-circuit to ground.
^ Then proceed to Verification section below.





Checking The Engine Control Module Connector
- Ignition off.
- Camshaft position sensor disconnected.
- Check engine control module connector for contact resistance and oxidation.
- Engine control module connected.
- Connect an ohmmeter between the camshaft position sensor connector 2 (engine control module side) and ground.
- The ohmmeter should read 0.5 - 3.0 k ohms.

If reading is OK:
^ The diagnostic trouble code was caused by poor contact in the engine control module connector.
^ Then proceed to Verification section below.

If reading is incorrect:
^ Check cable between the camshaft position sensor terminal 2 and engine control module # A21 for an open-circuit.
^ Then proceed to Verification section below.





Check Of The Camshaft Position Sensor
- Connect the camshaft position sensor.
- Try to start the engine.
- Does the engine start?

Yes:
^ The cause of the diagnostic trouble code is poor contact in the camshaft position sensor connector and/or the engine control module connector. Check connectors for contact resistance and oxidation.
^ Then proceed to Verification section below.

No:
^ Try a new camshaft position sensor.
^ Then proceed to Verification section below.





Checking Camshaft Position Sensor Signal
- The camshaft position sensor can malfunction due to a short-circuit to supply voltage in the signal cable. Check camshaft position sensor as follows.
- Connect the camshaft position sensor.
- Try to start the engine.
- Does the engine start?

Yes:
^ Camshaft position sensor OK.

No:
^ Try a new camshaft position sensor.
^ Then proceed to Verification section below.





Verification
- After carrying out the repair, check that the fault has been remedied as follows.
- Ignition off.
- Reconnect connectors, reinstall components.
- Try to start the engine.
- Does the engine start?

Yes:
^ Fault corrected

No:
^ Proceed to test step below.

Fault-tracing Information
The verification result shows that the fault persists.

- Do you want to exit fault-tracing?

Yes:
^ Fault not corrected

No:
^ Return to Checking Ground Lead section above.