ECD SYSTEM, Diagnostic DTC:13 (2)

DTC Code DTC Name
13 (2) Engine Speed Sensor Circuit Malfunction

DESCRIPTION

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

DTC No. DTC Detection Condition Trouble Area
13 (2) No NE signal to ECM for 0.5 sec. or more at 680 rpm or more

  • Open or short in engine speed sensor circuit

  • Engine speed sensor

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

WIRING DIAGRAM

A01E0K9E01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT ENGINE SPEED SENSOR


    1. A01E290E02

      Check the engine speed sensor installation.

    2. Disconnect the engine speed sensor connector.

    3. Measure the resistance of the engine speed sensor.

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

      Tech Tips

      The engine speed sensor is integrated with the injection pump assembly. If the engine speed sensor needs to be replaced, the entire injection pump assembly must be replaced.


    NG

    CHECK AND REPLACE INJECTION PUMP ASSEMBLY

    OK

  2. CHECK ECM (TDC, NE SIGNAL)


    1. A01DXMEE05

      While cranking or idling, measure the waveform according to the value(s) in the table below.

      OK
      Tester Connection Specified Condition
      E23-19 (NE+) - E23-18 (NE-) Correct waveform is as shown
      E23-17 (TDC+) - E23-16 (TDC-) Correct waveform is as shown

    OK

    REPLACE ECM

    NG

  3. CHECK WIRE HARNESS (ECM - ENGINE SPEED SENSOR)


    1. A01E25DE03

      Disconnect the engine speed sensor connector.

    2. Disconnect the E23 ECM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Specified Condition
      E19-2 (NE+) - E23-19 (NE+) Below 1 Ω
      E19-1 (NE-) - E23-18 (NE-) Below 1 Ω
      E23-19 (NE+) - E23-18 (NE-) 10 kΩ or higher
      E23-19 (NE+) - Body ground 10 kΩ or higher
      E23-18 (NE-) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    CHECK FOR INTERMITTENT PROBLEMS