DTC    13 (2)    Engine Speed Sensor Circuit Malfunction

для подготовки Нажмите здесь


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.
  1. Open or short in engine speed sensor circuit
  2. Engine speed sensor
  3. ECM
No NE signal is sent to the ECM for 2.0 sec. or more during cranking.

WIRING DIAGRAM

Refer to DTC 12 (See page Нажмите здесь).

INSPECTION PROCEDURE

1.INSPECT ENGINE SPEED SENSOR

  1. Inspect the engine speed sensor (See page Нажмите здесь).



NG
REPLACE INJECTION PUMP ASSEMBLY (Нажмите здесь)
OK


2.CHECK ECM (TDC, NE SIGNAL)


    A0096MYE09

  1. 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

    Text in Illustration 
    *a
    		Component with harness connected
    (ECM)
    *b
    		TDC and NE Signal Waveforms



NG
Перейдите к шагу 3
OK

REPLACE ECM (Нажмите здесь)  

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

  1. Disconnect the engine speed sensor connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    C103-2 (NE+) - C101-19 (NE+)
    		Always
    		Below 1 Ω
    C103-1 (NE-) - C101-18 (NE-)
    		Always
    		Below 1 Ω

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

  1. Reconnect the engine speed sensor connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

CHECK FOR INTERMITTENT PROBLEMS (Нажмите здесь)