FixVault
Home › Volvo › 1998 › S90 AW30-43 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes › Diagnostic Tests › DTC 314: Camshaft Position Sensor Signal

DTC 314: Camshaft Position Sensor Signal

  1. Using Volvo Scan Tool (998-8686 ) check status message. If fault is permanent, go to next step. If fault is intermittent, go to step 9).
  2. Turn ignition off. Wait about 2 minutes. Disconnect camshaft position sensor. Connect an ohmmeter between camshaft position sensor connector terminal No. 1 and ground. If ohmmeter reads about zero ohms, go to step 4). If ohmmeter does not read about zero ohms, go to next step.
  3. Turn ignition off. Disconnect ECM connector. Disconnect camshaft position sensor connector. Ensure ECM connector terminals are clean and free of oxidation. Reconnect ECM connector. Connect an ohmmeter between camshaft position sensor terminal No. 1 and ground. If ohmmeter reads about zero ohms, source of DTC is poor contact in ECM connector. If ohmmeter does not read about zero ohms, check wiring between camshaft position sensor connector terminal No. 1 and ECM connector terminal A18 for an open circuit.
  4. Turn ignition on. Disconnect camshaft position sensor connector. Connect voltmeter between camshaft position sensor connector terminal No. 3 and ground. If battery voltage is present, go to step 6). If battery voltage is not present, go to next step.
  5. Turn ignition off. Disconnect camshaft position sensor. Ensure ECM connector terminals are clean and free of oxidation. Reconnect ECM. Turn ignition on. Connect voltmeter between camshaft position sensor connector terminal No. 3 and ground. If voltmeter shows battery voltage, source of DTC is poor contact in ECM connector. If voltmeter does not show battery voltage, check wiring between CMP sensor connector terminal No. 3 and ECM connector terminal A36 for an open circuit.
  6. Turn ignition on. Disconnect camshaft position sensor connector. Connect test light between camshaft position sensor connector terminal No. 2 and ground. If test light does not come on, go to next step. If test light comes on, check wiring between camshaft position sensor connector terminal No. 2 and ECM connector terminal A21 for a short to voltage.
  7. Ensure camshaft position sensor is disconnected. Connect voltmeter between camshaft position sensor terminal No. 2 and ground. If battery voltage is present, reconnect camshaft position sensor connector. Erase DTC. Start and idle engine. If DTC resets, replace camshaft position sensor. If DTC does not reset, DTC was caused by poor terminal contact at camshaft position sensor or ECM connector. If battery voltage is not present, go to next step.
  8. Turn ignition off. Wait about 2 minutes. Connect ohmmeter between camshaft position sensor connector terminal No. 2 and ground. If ohmmeter reads infinite resistance, go to next step. If ohmmeter reads about zero ohms, check wiring between camshaft position sensor connector terminal No. 2 and ECM connector terminal A21 for a short circuit to ground.
  9. Turn ignition off. Disconnect camshaft position sensor. Disconnect ECM connector. Ensure ECM connector terminals are clean and free of oxidation. Reconnect ECM. Turn ignition on. Connect voltmeter between camshaft position sensor connector terminal No. 2 and ground. If voltmeter reads battery voltage, DTC was caused by poor terminal contact at ECM connector. If voltmeter does not read battery voltage, check wiring between camshaft position sensor connector terminal No. 2 and ECM connector terminal A21 for an open circuit.
  10. If fault is intermittent, check camshaft position sensor and ECM connectors for loose connection, contact resistance, or oxidation. Check wiring between camshaft position sensor connector terminal No. 1 and ECM connector terminal A18 for an intermittent open circuit. Check wiring between camshaft position sensor connector terminal No. 2 and ECM connector terminal A21 for an intermittent open circuit, short circuit to ground, or short circuit to voltage. Also check wiring between camshaft position sensor connector terminal No. 3 and ECM connector terminal A36 for an intermittent open circuit.
About FixVault