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 the 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 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
13 (2) No NE signal is sent to the 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 is sent to the ECM for 2.0 sec. or more during cranking.

WIRING DIAGRAM

Refer to DTC 12 Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT ENGINE SPEED SENSOR


    1. Inspect the engine speed sensor Click here.


    NG

    REPLACE INJECTION PUMP ASSEMBLY Click here

    OK

  2. CHECK ECM (TDC, NE SIGNAL)


    1. A01DQW6E09
      Text in Illustration
      *a

      Component with harness connected

      (ECM)
      *b TDC and NE Signal Waveforms

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

      OK
      Tester Connection Condition Specified Condition
      C101-17 (TDC+) - C101-16 (TDC-) Idling Correct waveform is as shown
      C101-19 (NE+) - C101-18 (NE-) Idling Correct waveform is as shown

    NG

    CHECK HARNESS AND CONNECTOR (ECM - ENGINE SPEED SENSOR) Click here

    OK

    REPLACE ECM Click here

  3. 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 (Check for Open)
      Tester Connection Condition Specified Condition
      C103-2 - C101-19 (NE+) Always Below 1 Ω
      C103-1 - C101-18 (NE-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      C103-2 or C101-19 (NE+) - Body ground Always 10 kΩ or higher
      C103-1 or C101-18 (NE-) - Body ground Always 10 kΩ or higher

    4. Reconnect the engine speed sensor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here