ENGINE (DIAGNOSTICS)(H4DOTC) > Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0340 CAMSHAFT POSITION SENSOR “A” CIRCUIT (BANK 1 OR SINGLE SENSOR)

ENGINE (DIAGNOSTICS)(H4DOTC) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0340 CAMSHAFT POSITION SENSOR “A” CIRCUIT (BANK 1 OR SINGLE SENSOR)

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

• Engine stalls.

• Failure of engine to start

CAUTION:

After repairing or replacing the defective part, perform the Clear Memory Mode and Inspection Mode .

WIRING DIAGRAM:

STEP	CHECK	YES	NO
1.CHECK POWER SUPPLY OF CAMSHAFT POSITION SENSOR. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from camshaft position sensor. 3) Measure the voltage between camshaft position sensor and engine ground. Connector & terminal (E36) No. 1 (+) — Engine ground (−):	Is the voltage 10 V or more?	Repair the short to power supply between main relay connector and camshaft position sensor connector.
2.CHECK POWER SUPPLY OF CAMSHAFT POSITION SENSOR. 1) Turn the ignition switch to ON. 2) Measure the voltage between camshaft position sensor and engine ground. Connector & terminal (E36) No. 1 (+) — Engine ground (−):	Is the voltage 10 V or more?		Repair the open or ground short circuit between main relay connector and camshaft position sensor connector.
3.CHECK HARNESS BETWEEN CAMSHAFT POSITION SENSOR AND ECM. 1) Turn the ignition switch to OFF. 2) Disconnect the connectors from the ECM. 3) Measure the resistance between camshaft position sensor and ECM. Connector & terminal (E36) No. 2 — (B134) No. 11: (E35) No. 3 — (B134) No. 22:	Is the resistance less than 1 Ω?		Repair the open circuit between camshaft position sensor and ECM.
4.CHECK HARNESS BETWEEN CAMSHAFT POSITION SENSOR AND ECM. Measure the resistance between camshaft position sensor and engine ground. Connector & terminal (E36) No. 2 — Engine ground: (E35) No. 3 — Engine ground:	Is the resistance 1 MΩ or more?		Repair the ground short between the camshaft position sensor and ECM.
5.CHECK INSTALLATION OF CAMSHAFT POSITION SENSOR.	Is the camshaft position sensor installation bolt tightened securely?		Tighten the camshaft position sensor installation bolt securely.
6.CHECK CAMSHAFT POSITION SENSOR. Check waveform of camshaft position sensor.	Is there any abnormality in waveform?	Replace the camshaft position sensor.
7.CHECK POOR CONTACT. Check poor contact of ECM connector.	Is there poor contact in ECM connector?	Repair the poor contact of ECM connector.	Replace the ECM.