ECD SYSTEM, Diagnostic DTC:P0335

DTC Code DTC Name
P0335 Crankshaft Position Sensor "A" Circuit

DESCRIPTION

The engine speed sensor in the engine control system contains a signal plate and a pickup coil for the NE signal. The NE signal plate has 56 teeth and is mounted in the injection or supply pump assembly. The NE signal sensor generates 56 signals for every 2 engine revolutions. The ECM detects the engine speed and the cam lift position of the injection or supply pump assembly. The ECM uses the TDC and NE signals for injection timing control. The NE signal is also used for injection volume control.

DTC No. DTC Detection Condition Trouble Area
P0335 No NE signal to ECM for 0.5 seconds or more at 680 rpm or more.

  • Open or short in engine speed sensor circuit

  • Injection or supply pump assembly

  • ECM
No NE signal to ECM for 2.0 seconds or more during cranking.

WIRING DIAGRAM

A003GOXE04

INSPECTION PROCEDURE

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 ENGINE SPEED SENSOR


    1. A003G67E03

      Check the engine speed sensor installation.

    2. Disconnect the engine speed sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 205 to 255 Ω

      Tech Tips

      The engine speed sensor is integrated with the injection or supply pump assembly. If the engine speed sensor is replaced, the injection or supply pump assembly must be replaced in whole.


    NG

    REPLACE INJECTION OR SUPPLY PUMP ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (ECM - ENGINE SPEED SENSOR)


    1. Disconnect the engine speed 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
      D18-2 - D100-102 (NE+) Always Below 1 Ω
      D18-1 - D100-125 (NE-) Always Below 1 Ω
      D18-2 or D100-102 (NE+) - Body ground Always 10 kΩ or higher
      D18-1 or D100-125 (NE-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here