SFI SYSTEM (w/o Electronic Throttle Control System), Diagnostic DTC:P0335, P0336

DTC Code DTC Name
P0335 Crankshaft Position Sensor "A" Circuit
P0336 Crankshaft Position Sensor "A" Circuit Range / Performance

DESCRIPTION

The crankshaft position sensor system consists of a crankshaft position sensor plate and a pickup coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and magnet. The sensor plate rotates and as each tooth passes through the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per engine revolution. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, fuel injection and ignition timing are controlled.

DTC No. DTC Detection Condition Trouble Area
P0335

No crankshaft position sensor signal to ECM during the engine cranking (1 trip detection logic)

At this time, engine may not start.

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft (sensor plate)

  • ECM
P0336

No missing teeth detected during engine cranking (34 teeth plus 2 missing teeth on crankshaft position sensor).

(3 trip detection logic)

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft (sensor plate)

  • ECM
P0336

The number of wave peaks of crankshaft position sensor signal is successively 1 more or 1 less during engine cranking.

(3 trip detection logic)

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft (sensor plate)

  • ECM

The correct waveform is as shown below.

G1 stands for the camshaft position sensor signal, and NE+ stands for the crankshaft position sensor signal.

Item Contents
Terminal

CH1: G1 - E1

CH2: NE+ - NE-
Equipment Setting 5 V/Division, 20 ms/Division
Condition While cranking or idling
A01375DE06

Tech Tips


  • DTC P0335 is detected when the engine cranks 16 revolutions or more.

  • DTC P0336 is detected when the engine cranks 8 revolutions or more.

WIRING DIAGRAM

A013656E01

INSPECTION PROCEDURE

Tech Tips

The engine speed can be confirmed in the Data List using the intelligent tester (select the following menu items: Powertrain / Engine and ECT / Data List / Engine SPD). If there are no NE signals from the crankshaft position sensor despite the engine revolving, the engine speed will be indicated as zero. If the voltage output of the crankshaft position sensor is insufficient, the engine speed will be indicated as lower than the actual engine rpm.

PROCEDURE


  1. INSPECT CRANK POSITION SENSOR (SENSOR RESISTANCE)


    1. A0136C2E02

      Disconnect the B6 crankshaft position sensor connector.

    2. Measure the resistance between terminals 1 and 2.

      Standard resistance
      Tester Connection Specified Condition
      1 - 2 1,850 to 2,450 Ω at 20°C (68°F)

    3. Reconnect the crankshaft position sensor connector.


    NG

    REPLACE CRANK POSITION SENSOR

    OK

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


    1. A0136YTE01

      Disconnect the B6 crankshaft position sensor connector.

    2. Disconnect the B25 ECM connector.

    3. Measure the resistance.

      Standard resistance (check for open)
      Tester Connection Specified Condition
      Crankshaft position sensor (B6-1) - NE+ (B25-27) Below 1 Ω
      Crankshaft position sensor (B6-2) - NE- (B25-8) Below 1 Ω
      Standard resistance (check for short)
      Tester Connection Specified Condition
      Crankshaft position sensor (B6-1) or NE+ (B25-27) - Body ground 10 kΩ or higher
      Crankshaft position sensor (B6-2) or NE- (B25-8) - Body ground 10 kΩ or higher

    4. Reconnect the crankshaft position sensor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  3. CHECK CRANK POSITION SENSOR (SENSOR INSTALLATION)


    1. Check the crankshaft position sensor installation.

      OK
      The sensor is installed correctly.

    NG

    REPAIR OR REPLACE CRANK POSITION SENSOR

    OK

  4. CHECK CRANKSHAFT POSITION SENSOR PLATE


    1. Check the teeth of the sensor plate.

      OK
      The plate does not have any cracks or deformation.

    NG

    REPLACE CRANKSHAFT

    OK

  5. REPLACE CRANK POSITION SENSOR


    NEXT

  6. CHECK IF DTC OUTPUT RECURS


    1. Start the engine.

    2. Connect the intelligent tester to the DLC3.

    3. Select the following menu items: Powertrain / Engine and ECT / DTC / Pending.

      Result
      Display (DTC Output) Proceed To
      No output A
      P0335 or P0336 B

      Tech Tips

      If the engine does not start, replace the ECM.


    B

    REPLACE ECM

    A

    END