SFI SYSTEM(w/o EGR System), Diagnostic DTC:P0335,P0337,P0338 and P0339

DTC Code DTC Name
P0335 Crankshaft Position Sensor "A" Circuit
P0337 Crankshaft Position Sensor "A" Circuit Low Input
P0338 Crankshaft Position Sensor "A" Circuit High Input
P0339 Crankshaft Position Sensor "A" Circuit Intermittent

DESCRIPTION

The crankshaft position sensor system consists of a crankshaft angle sensor rotor and Magnetoresistive Element (MRE) type sensor. The crankshaft angle sensor rotor has 34 teeth at 10° intervals (2 teeth are missing for detecting top dead center), and is installed to the rear end of the crankshaft. The crankshaft position sensor generates 34 signals per crankshaft revolution. The ECM uses the G2 signal to distinguish between the cylinders, and uses the NE signal to detect the crankshaft position and engine speed.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P0335

Crankshaft Position Sensor "A" Circuit

Either condition is met:

  • No crankshaft position sensor signal is sent to the ECM while cranking (1 trip detection logic).

  • No crankshaft position sensor signal is sent to the ECM at an engine speed of 600 rpm or more (1 trip detection logic).

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft angle sensor rotor

  • ECM

Comes on

DTC stored

P0337

Crankshaft Position Sensor "A" Circuit Low Input

Output voltage of crankshaft position sensor is 0.3 V or less for 4 seconds (1 trip detection logic).

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft angle sensor rotor

  • ECM

Comes on

DTC stored

P0338

Crankshaft Position Sensor "A" Circuit High Input

Output voltage of crankshaft position sensor is 4.7 V or higher for 4 seconds (1 trip detection logic).

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft angle sensor rotor

  • ECM

Comes on

DTC stored

P0339

Crankshaft Position Sensor "A" Circuit Intermittent

Under conditions (a), (b) and (c), no crankshaft position sensor signal is sent to the ECM for 0.05 seconds or more (1 trip detection logic):

(a) Engine speed is 1000 rpm or more.

(b) Starter signal is off.

(c) 3 seconds or more have elapsed since the starter signal switched from on to off.

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft angle sensor rotor

  • ECM

-

DTC stored
  • A211721E06

    Reference: Inspection using an oscilloscope.

    Standard

    Tester Connection

    Tool Setting

    Condition

    Specified Condition

    C28-6 (NE+) - C28-5 (NE-)

    5 V/DIV., 20 msec./DIV.

    Cranking or idling

    The correct waveform is as shown

    C28-9 (G2) - C28-10 (G2-)

    5 V/DIV., 20 msec./DIV.

    Cranking or idling

    The correct waveform is as shown
    Tip:

    G2 is the camshaft position sensor signal, and NE is the crankshaft position sensor signal.

MONITOR DESCRIPTION

If there is no signal from the crankshaft position sensor despite the crankshaft revolving, the ECM interprets this as a malfunction of the sensor.

When the sensor output voltage remains at below 0.3 V, or higher than 4.7 V for more than 4 seconds, the ECM stores a DTC.

CONFIRMATION DRIVING PATTERN

  1. Start the engine and run it at idle for 20 seconds or more.

WIRING DIAGRAM

A232651E02

CAUTION / NOTICE / HINT

Tip:

  • If no problem is found by this diagnostic troubleshooting procedure, check for problems by referring to the engine mechanical section.

  • The engine speed can be checked by using the intelligent tester. To perform the check, follow the procedures below:

    1. Connect the intelligent tester to the DLC3.

    2. Start the engine.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Engine Speed.

    • The engine speed may be indicated as zero despite the engine running normally. This is caused by a lack of NE signals from the crankshaft position sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the crankshaft position sensor output voltage is insufficient.

  • Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

  1. READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED)

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Engine Speed.

      Powertrain > Engine and ECT > Data List

      Tester Display

      Engine Speed

    5. Start the engine.

    6. Read the values displayed on the tester while the engine is running.

      Standard

      Correct values are displayed.

      Tip:

      • To check the engine speed change, display the graph on the intelligent tester.

      • If the engine does not start, check the engine speed while cranking.

      • If the engine speed indicated on the intelligent tester remains zero (0), there may be an open or short in the Crankshaft Position sensor circuit.

      Result

      Result

      OK

      NG
    OK

    CHECK FOR INTERMITTENT PROBLEMS

    Click here

    NG

  2. INSPECT CRANKSHAFT POSITION SENSOR (SENSOR POWER SOURCE)

    1. A186169C01

      *a

      Front view of wire harness connector

      (to Crankshaft Position Sensor)

      Disconnect the crankshaft position sensor connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      C42-3 (VC) - Body ground

      Engine switch on (IG)

      4.5 to 5.0 V

      Result

      Result

      OK

      NG
    NG

    CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)Click here

    OK

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

    1. Disconnect the crankshaft position 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

      C42-1 (NE+) - C28-6 (NE+)

      Always

      Below 1 Ω

      C42-2 (NE-) - C28-5 (NE-)

      Always

      Below 1 Ω

      C42-1 (NE+) or C28-6 (NE+) - Body ground

      Always

      10 kΩ or higher

      C42-2 (NE-) or C28-5 (NE-) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

    1. BR03795E98

      Check the crankshaft position sensor installation.

      OK

      Sensor is installed correctly.

      Result

      Result

      OK

      NG
    NG

    SECURELY REINSTALL SENSOR

    Click here

    OK

  5. INSPECT CRANKSHAFT ANGLE SENSOR ROTOR (TEETH OF SENSOR ROTOR)

    1. Check the teeth of the sensor rotor.

      OK

      Sensor rotor does not have any cracks or deformation.

      Result

      Result

      OK

      NG
    NG

    REPLACE CRANKSHAFT ANGLE SENSOR ROTOR

    Click here

    OK

  6. REPLACE CRANKSHAFT POSITION SENSOR

    1. Replace the crankshaft position sensor.

      Click here

      Result

      Result

      NEXT
    NEXT

  7. CHECK WHETHER DTC OUTPUT RECURS (DTC P0335, P0337, P0338 AND/OR P0339)

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

    5. Start the engine.

    6. Enter the following menus: Powertrain / Engine and ECT / DTC.

    7. Read DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      No DTC is output

      A

      P0335, P0337, P0338 or P0339 is output

      B
      Tip:

      If the engine does not start, replace the ECM.

    A

    END

    B

    REPLACE ECM

    Click here

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

    1. Disconnect the crankshaft position 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

      C42-3 (VC) - C28-16 (VCV2)

      Always

      Below 1 Ω

      C42-3 (VC) or C28-16 (VCV2) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    OK

    REPLACE ECM

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR