DTC P0343: CAMSHAFT POSITION SENSOR SUPPLY VOLTAGE TOO HIGH
Monitor & Set Conditions
Camshaft Position Sensor (CMP) sensor supply voltage is monitored when ignition is on. DTC may be stored when CMP sensor supply voltage is greater than 5.5 volts for 2 seconds.
Possible Causes
- Intermittent Wiring Problem
- 5-volt Supply Circuit Shorted To Voltage
- ECM
Testing
1. Turn ignition off. Disconnect Camshaft Position (CMP) sensor harness connector. CMP sensor is located on left side of engine, below fuel injection pump. Turn ignition on. Using DVOM connected to ground, measure voltage at terminal "A" (Violet/White wire) at CMP sensor harness connector. If voltage is greater than 5.5 volts, go to next step. If voltage is 5.5 volts or less, check wiring and connectors associated with CMP sensor circuit for intermittent problems.
2. Turn ignition off. Ensure CMP sensor harness connector is still disconnected. Disconnect ECM harness connector. ECM is located on driver's side of engine, just in front of fuel transfer pump and contains a 50-pin connector. Check for poor connection/terminal contact at ECM harness connector. Repair as necessary. Turn ignition on. Using DVOM connected to ground, measure voltage at terminal "A" (Violet/White wire) on CMP sensor harness connector. If voltage is greater than 5 volts, repair short to voltage in Violet/White wire between CMP sensor and ECM. If voltage is 5 volts or less, replace and program ECM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article.