DTC P0340: Camshaft Position Sensor Circuit

CIRCUIT OPERATION
• The camshaft position sensor power is supplied from the MFI relay (terminal No. 1), and the ground is provided on the vehicle body.
• A 5-volt voltage is applied on the camshaft position sensor output terminal (terminal No. 2) from the PCM (terminal No. 56). The camshaft position sensor generates a pulse signal when the output terminal is opened and grounded.
TECHNICAL DESCRIPTION
• The camshaft position sensor functions to detect the top dead center position of the number 1 cylinder and to convert that data to pulse signals that are input to the PCM.
• When the engine is running, the camshaft position sensor outputs a pulse signal.
• The PCM checks whether pulse signal is input while the engine is cranking.
DESCRIPTIONS OF MONITOR METHODS
• Camshaft position sensor signal does not change.
• Camshaft position sensor signal is not normal pattern.
MONITOR EXECUTION
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
• Not applicable

Sensor (The sensor below is determined to be normal)
• Not applicable
DTC SET CONDITIONS <Range/Performance problem - alignment> Logic Flow Chart


Check Conditions
Engine speed is higher than 50 r/min.

Judgment Criteria
• Camshaft position sensor output voltage has not changed (no pulse signal is input) for 2 seconds.
DTC SET CONDITIONS <Circuit - continuity> Logic Flow Chart


Check Conditions
• Engine speed is higher than 50 r/min.

Judgment Criteria
Normal signal pattern has not been input for cylinder identification from the crankshaft position sensor signal and camshaft position sensor signal for 2 seconds.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Procedure 6 - Other Monitor .
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:
• Camshaft position sensor failed.
• Camshaft position sensing cylinder.
• Open or shorted camshaft position sensor circuit, harness damage or connector damage.
• PCM failed.