DTC P0340 (No.15): Camshaft Position (CMP) Sensor Circuit Malfunction
Wiring Diagram
1. CKP sensor *: Vehicle equipped with immobilizer control system
2. ECM      
Connect oscilloscope between “E115-11 (E115-14)” and “E115-1” terminals of ECM connector connected to ECM and check CMP sensor signal referring to “Reference waveform No.11” in Inspection of ECM and Its Circuits:M13A without VVT and “Reference waveform No.12” in Inspection of ECM and Its Circuits:M13A without VVT .
DTC Detecting Condition and Trouble Area
DTC detecting condition Trouble area
The number of CMP sensor signal pulses is incorrect during 8 revolution of crankshaft.
CMP sensor circuit open or short.
Signal rotor teeth damaged.
CMP sensor malfunction, foreign material being attached or improper installation.
ECM malfunction.
CMP sensor phase lag.
DTC Confirmation Procedure
1) Clear DTC.
2) Start engine and keep it at idle for 1 min.
3) Select “DTC” mode on scan tool and check DTC.
DTC Troubleshooting
Step Action YES NO
Was “Engine and Emission Control System Check” performed?
Go to Step 2.
Check CMP sensor and connector for proper installation
Is CMP sensor installed properly and connector connected securely?
Go to Step 3.
Check wire harness and connection
1) Disconnect connector from CMP sensor.
2) Check for proper connection to CMP sensor at each terminal.
3) If OK, turn ignition switch ON and check for voltage at each terminal of sensor connector disconnected.
Terminal “B+”: 10 – 14 V
Terminal “Vout”: 4 – 5 V
Terminal “GND”: 0 V
Is check result satisfactory?
Go to Step 5.
Go to Step 4.
Was terminal “Vout” voltage out of specification in Step 3 check?
“WHT” wire open, short or poor connection.
If wire and connection are OK, substitute a known-good ECM and recheck.
“BLU/BLK” or “BLK” wire open, short or poor connection.
Check ground circuit for open
1) Turn ignition switch OFF.
2) Check for continuity between “GND” terminal of CMP sensor connector and engine ground.
Is continuity indicated?
Go to Step 6.
“BLK” wire open or poor ground connection.
Check CMP sensor for operation
1) Check CMP sensor and signal rotor referring to Camshaft Position (CMP) Sensor Inspection:M13A .
Is it in good condition?
Substitute a known-good ECM and recheck.
Clean or replace rotor teeth or replace CMP sensor.