DTC    P0335    Crankshaft Position Sensor "A" Circuit

DTC    P0337    Crankshaft Position Sensor "A" Circuit Low Input

DTC    P0338    Crankshaft Position Sensor "A" Circuit High Input

DTC    P0339    Crankshaft Position Sensor "A" Circuit Intermittent

for Preparation Click here


DESCRIPTION

The Crankshaft Position (CKP) sensor system consists of a magnet and Magneto Resistive Element (MRE). The CKP sensor detects the position of the crankshaft sensor plate which has 34 teeth and is installed on the crankshaft.
When the crankshaft rotates, changes occur in the air gaps between the teeth and the sensor, affecting the magnetic field. As a result, the resistance of the MRE material fluctuates. The CKP sensor converts the crankshaft rotation data to pulse signals, and uses the pulse signals to determine the crankshaft angle, which it sends to the ECM. Then the ECM uses this data to control fuel injection duration and injection timing.

DTC No.
DTC Detection Condition
Trouble Area
P0335*
No crankshaft position sensor signal to ECM while cranking
(1 trip detection logic)
  1. Open or short in crankshaft position sensor circuit
  2. Crankshaft position sensor
  3. Crankshaft position sensor plate
  4. ECM
No crankshaft position sensor signal to ECM at engine speed of 600 rpm or more
(1 trip detection logic)
P0337
Output voltage of crankshaft position sensor 4.7 V or more for 4 seconds
(1 trip detection logic)
P0338
Output voltage of crankshaft position sensor 0.3 V or less for 4 seconds
(1 trip detection logic)
P0339*
Under conditions (a), (b) and (c), no crankshaft position sensor signal to ECM for 0.05 seconds or more
(1 trip detection logic):
(a) Engine speed 1000 rpm or more
(b) Starter signal OFF
(c) 3 seconds or more have elapsed since starter signal switched from ON to OFF
*: for Manual Transaxle
When the engine is stopped and started automatically due to Stop and Start system control, the crankshaft position sensor does not monitor during the automatic cranking, but will resume monitoring when the engine is running.

  1. A200774E01
    Reference: Inspection using an oscilloscope.

    HINT:
    1. The correct waveform is as shown.
    2. Grounding failure of the shielded wire may cause a noisy waveform.

    Item
    		Content
    Terminals
    		Between NE+ and NE-
    Equipment Settings
    		2 V/DIV.
    20 ms./DIV.
    Conditions
    		Idling with warm engine

WIRING DIAGRAM


A198793E07


INSPECTION PROCEDURE

HINT:
  1. If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.
  2. Check the engine speed. The engine speed can be checked by using the intelligent tester. Follow the procedure 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 / Engine Speed.
    1. The engine speed may be indicated as zero despite the engine revolving 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.
  3. Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

1.READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

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

  1. Start the engine.

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

    OK:
    Correct values are displayed.

    HINT:
    1. To check the engine speed change, display the graph on the tester.
    2. If the engine does not start, check the engine speed while cranking.
    3. If the engine speed indicated on the tester remains zero (0), there may be an open or short in the crankshaft position sensor circuit.



NG
Go to step 2
OK

CHECK FOR INTERMITTENT PROBLEMS (Click here)  

2.INSPECT CRANKSHAFT POSITION SENSOR (SENSOR POWER SOURCE)


    A209301E04

  1. Disconnect the crankshaft position sensor connector.

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    B54-3 (VC) - Body ground
    		Ignition switch ON
    		4.5 to 5.5 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Crankshaft Position Sensor)

  1. Reconnect the crankshaft position sensor connector.



NG
Go to step 8
OK


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

  1. Disconnect the crankshaft position 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
    B54-1 (NE+) - B8-93 (NE+)
    		Always
    		Below 1 Ω
    B54-2 (NE-) - B8-117 (NE-)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    B54-1 (NE+) or B8-93 (NE+) - Body ground
    		Always
    		10 kΩ or higher
    B54-2 (NE-) or B8-117 (NE-) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the ECM connector.

  1. Reconnect the crankshaft position sensor connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)


    BR03795E17

  1. Check the crankshaft position sensor installation.

    OK:
    Sensor is installed correctly.



NG
SECURELY REINSTALL CRANKSHAFT POSITION SENSOR
OK


5.INSPECT CRANKSHAFT (CRANK ANGLE SENSOR PLATE)

  1. Check the teeth of the crank angle sensor plate.

    OK:
    Teeth do not have any cracks or deformation.



NG
REPLACE CRANKSHAFT (CRANK ANGLE SENSOR PLATE) (Click here)
OK


6.REPLACE CRANKSHAFT POSITION SENSOR

  1. Replace the crankshaft position sensor (Click here).


NEXT


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

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Clear the DTCs (Click here).

  1. Start the engine.

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

  1. Read the DTCs.
    Result 
    Result
    		Proceed to
    DTC is not output
    		A
    DTC P0335, P0337, P0338 or P0339 is output
    		B



B
REPLACE ECM (Click here)
A

END 

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

  1. Disconnect the crankshaft position 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
    B54-3 (VC) - B8-116 (VCNE)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    B54-3 (VC) or B8-116 (VCNE) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the ECM connector.

  1. Reconnect the crankshaft position sensor connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Click here)