ECD SYSTEM, Diagnostic DTC:13

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

DESCRIPTION

Crankshaft position sensor (NE signal) consists of a magnet, iron core and pickup coil.

The NE signal plate has 34 teeth and is installed the crank angle sensor plate. The NE signal sensor generates 34 signals of every engine revolution. The ECU detects the standard crankshaft angle based on the G1 signal, and the actual crankshaft angle and the engine speed by the NE signal.

DTC No. DTC Detecting Condition Trouble Area
13 No crankshaft position sensor signal to ECM for 0.5 sec. or more at 650 rpm or more

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crank angle sensor plate

  • ECM
No crankshaft position sensor signal to ECM for 2.0 sec. or more during cranking

WIRING DIAGRAM

Refer to DTC No. 12 on page Click here.

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using intelligent tester. Because freeze frame records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

PROCEDURE


  1. CHECK CRANKSHAFT POSITION SENSOR


    1. A01KIFJE01
      Text in Illustration
      *1 Ohmmeter

      Check the resistance between terminals 1 and 2 of the crankshaft position sensor.

      Resistance
      Cold 1630 - 2740 Ω
      Hot 2065 - 3225 Ω

      Tech Tips

      "Cold" and "Hot" above express the temperature of the part itself. "Cold" is from -10°C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).

    2. A01KEA1E01
      Text in Illustration
      *a 5 V/ Division
      *b G and NE Signal Waveforms
      *c 20 msec./Division (Idling)

      Reference:

      Inspection using the oscilloscope.


      1. During cranking or idling, check the waveform between terminals G+ and G-, and NE+ and NE- of the ECM connector.

        Tech Tips

        The correct waveforms are as shown in the left.


    NG

    REPLACE CRANKSHAFT POSITION SENSOR

    OK

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


    1. A01KH0QE02

      Disconnect the crankshaft position sensor connector.

    2. Disconnect the ECM (E7) connector.

    3. Check the continuity between terminals of the crankshaft position sensor and ECM connectors as shown in the illustration and table.

      Continuity (Check for open)

      Terminal

      (Crankshaft position sensor ←→ ECM)

      		 Standard
      NE+ (1) ←→ NE+ (E7-17) Continuity
      NE- (2) ←→ NE- (E7-28)
      Continuity (Check for short)

      Terminal

      (ECM ←→ ECM(Ground))

      		 Standard
      NE+ (E7-17) ←→ E1 (E7-22) No continuity
      NE- (E7-28) ←→ E1 (E7-22)

    NG

    REPAIR WIRE HARNESS

    OK

  3. INSPECT CRANKSHAFT POSITION SENSOR PLATE NO. 1 (TEETH OF SIGNAL PLATE)


    1. Remove the crankshaft position sensor plate No. 1 Click here.

    2. Check the teeth of signal plate.


    NG

    REPLACE CRANKSHAFT POSITION SENSOR PLATE NO. 1

    OK

    CHECK AND REPLACE ECM Click here