P0340
DTC P0340 CMP SENSOR (PHASE)
Component Description
The camshaft position sensor (PHASE) senses the protrusion of camshaft (INT) to identify a particular cylinder. The camshaft position sensor (PHASE) senses the piston position. When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor (PHASE) provides various controls of engine parts instead, utilizing timing of cylinder identification signals. The sensor consists of a permanent magnet and Hall IC. When engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. Due to the changing magnetic field, the voltage from the sensor changes.
ECM receives the signals as shown in the figure.
CONSULT-III Reference Value in Data Monitor Mode
Specification data are reference values.
On Board Diagnosis Logic
NOTE:
If DTC P0340 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. P0643 P0643.
DTC Confirmation Procedure
NOTE:
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 with ignition switch ON.
1. Crank engine for at least 2 seconds and run it for at least 5 seconds at idle speed.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to SEE Diagnosis Procedure.
If 1st trip DTC is not detected, go to next step.
4. Maintain engine speed at more than 800 rpm for at least 5 seconds.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to SEE Diagnosis Procedure.
Wiring Diagram
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnosis Procedure
1.CHECK STARTING SYSTEM
Turn ignition switch to START position.
Yes or No
Yes - GO TO 2.
No - Check starting system. ( Testing and Inspection.)
2.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. POWER SUPPLY AND GROUND CIRCUIT.
OK or NG
OK - GO TO 3.
NG - Repair or replace ground connections.
3.CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT
1. Disconnect camshaft position (CMP) sensor (PHASE) (1) harness connector.
Arrow Indicates Vehicle front
2. Turn ignition switch ON.
3. Check voltage between CMP sensor (PHASE) terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between CMP sensor (PHASE) terminal 2 and ECM terminal 63. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between CMP sensor (PHASE) terminal 3 and ECM terminal 65. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 6.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK CAMSHAFT POSITION SENSOR (PHASE)
SEE Component Inspection.
OK or NG
OK - GO TO 7.
NG - Replace camshaft position sensor (PHASE).
7.CHECK CAMSHAFT (INTAKE)
Check the following.
- Accumulation of debris to the signal plate of camshaft (1) rear end
- Chipping signal plate of camshaft rear end
OK or NG
OK - GO TO 8.
NG - Remove debris and clean the signal plate of camshaft rear end or replace camshaft.
8.CHECK INTERMITTENT INCIDENT
Trouble Diagnosis For Intermittent Incident Trouble Diagnosis For Intermittent Incident.
- INSPECTION END
Component Inspection
CAMSHAFT POSITION SENSOR (PHASE)
1. Loosen the fixing bolt of the sensor.
2. Disconnect camshaft position sensor (PHASE) harness connector.
3. Remove the sensor.
4. Visually check the sensor for chipping.
5. Check resistance as shown in the figure.
6. If NG, replace camshaft position sensor (PHASE).
Removal and Installation
CAMSHAFT POSITION SENSOR (PHASE)
Removal And Installation .