P0340
COMPONENT DESCRIPTION
The camshaft position sensor (PHASE) is located on the engine front cover facing the camshaft sprocket. It detects the cylinder No. signal.
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the camshaft sprocket will periodically change. Permeability near the sensor also changes.
Due to the permeability change, the magnetic flux near the core is changed. Therefore, the voltage signal generated in the coil is changed.
The ECM receives the voltage signal and detects the cylinder No. signal.
ON BOARD DIAGNOSIS LOGIC
Malfunction is detected when
(Malfunction A) the cylinder No. signal is not sent to ECM for the first few seconds during engine cranking,
(Malfunction B) the cylinder No. signal is not sent to ECM during engine running,
(Malfunction C) the cylinder No. signal is not in the normal pattern during engine running.
Possible Cause
- Harness or connectors
[The camshaft position sensor (PHASE) circuit is open or shorted.]
- Camshaft position sensor (PHASE)
- Starter motor
- Starting system circuit
- Dead (Weak) battery
DTC Confirmation Procedure
NOTE:
- Perform "PROCEDURE FOR MALFUNCTION A" first. If 1st trip DTC cannot be confirmed, perform "PROCEDURE FOR MALFUNCTION B AND C".
- If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.
TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.
PROCEDURE FOR MALFUNCTION A
WITH CONSULT-II
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Crank engine for at least 2 seconds.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure" at the end of the article.
WITH GST
Follow the procedure "With CONSULT-II" above.
PROCEDURE FOR MALFUNCTION B AND C
WITH CONSULT-II
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Start engine and run it for at least 2 seconds at idle speed.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.
WITH GST
Follow the procedure "With CONSULT-II" above.
EC-PHASE-01:
EC-PHASE-01 - Connector View:
ECM Terminals And Reference Value:
WIRING DIAGRAM
DIAGNOSTIC PROCEDURE
Diagnostic Procedure Steps 1 - 3:
Diagnostic Procedure Steps 4 - 6:
