ECD SYSTEM, Diagnostic DTC:P0340

DTC Code DTC Name
P0340 Camshaft Position Sensor Circuit

DESCRIPTION

The crankshaft position sensor in the engine control system contains a signal plate and a pickup coil for the TDC signal.The TDC signal plate has 1 tooth on its outer circumference. The TDC signal sensor generates 1 signal for every engine revolution. The ECM detects the top dead center by the TDC signals.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0340 Camshaft Position Sensor Circuit No TDC signal to ECM at 400 rpm or more.

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • ECM

 Comes on DTC stored

WIRING DIAGRAM

Refer to DTC P0335.

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CAUTION / NOTICE / HINT

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. INSPECT CRANKSHAFT POSITION SENSOR


    1. Check the crankshaft position sensor installation.

    2. Inspect the crankshaft position sensor.

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      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CRANKSHAFT POSITION SENSOR Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (ECM - CRANKSHAFT POSITION SENSOR)


    1. Disconnect the crankshaft position sensor connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      C134-1 - C128-26 (TDC+) Always Below 1 Ω
      C134-2 - C128-34 (TDC-) Always Below 1 Ω
      C134-1 or C128-26 (TDC+) - Body ground and other terminals Always 10 kΩ or higher
      C134-2 or C128-34 (TDC-) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR