DTC P0335 2ZR-FXE

DTC P0335 Crankshaft Position Sensor "A" Circuit

  1. Description

  2. Monitor description

  3. Monitor strategy

  4. Component operating range

  5. Confirmation driving pattern

  6. Wiring diagram

  7. Inspection procedure

  8. Read value using intelligent tester (engine speed)

  9. Inspect crankshaft position sensor (resistance)

  10. Check harness and connector (crankshaft position sensor - ecm)

  11. Check sensor installation (crankshaft position sensor)

  12. Inspect no. 1 crankshaft position sensor plate (teeth of sensor plate)

  13. Replace crankshaft position sensor

  14. Check whether dtc output recurs

Description

The crankshaft position sensor system consists of a No. 1 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 wound copper wire, an iron core and magnet. The sensor plate rotates and, as each tooth passes by 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, the fuel injection time and ignition timing are controlled.

DTC No. DTC Detection Condition Trouble Area
P0335 One of the following conditions is met (1 trip detection logic):
  1. No crankshaft position sensor signal to ECM while power switch on (IG)
  2. No crankshaft position sensor signal to ECM while engine running
  3. Missing crankshaft position sensor signal despite camshaft position sensor signal inputs normal after engine cranked
  1. Open or short in crankshaft position sensor circuit
  2. Crankshaft position sensor
  3. No. 1 crankshaft position sensor plate
  4. ECM
  1. Lexus DTC P0335 Inspection using an oscilloscope. Reference: Inspection using an oscilloscope.

    Standard:

    Tester Connection Tool Setting Condition Specified Condition
    D27-74 (NE+) - D27-120 (NE-) 5 V/DIV., 20 ms./DIV. Idling with warm engine The correct waveform is as shown
    D27-74 (G2+) - D27-122 (G2-) 5 V/DIV., 20 ms./DIV. Idling with warm engine The correct waveform is as shown

    HINT:

    1. G2 is the camshaft position sensor signal, and NE is the crankshaft position sensor signal.
    2. A failure of the ground for the shielding of the wiring may result in noisy waveforms.

Monitor description

If there is no signal from the crankshaft position sensor despite the power switch on (IG) or engine running, the ECM interprets this as a malfunction of the sensor.

Monitor strategy

Required Sensors/Components (Main) Crankshaft position sensor
Required Sensors/Components (Related) Camshaft position sensor
Frequency of Operation Continuous

Component operating range

Crankshaft position sensor
  1. Crankshaft position sensor output voltage fluctuates while crankshaft revolving
  2. 34 crankshaft position sensor signals per crankshaft revolution

Confirmation driving pattern

  1. Put the engine in inspection mode (maintenance mode) .
  2. Start the engine and run it at idle for 20 seconds or more.

Wiring diagram

Lexus DTC P0335 Wiring diagram

Inspection procedure

HINT:

  1. After performing the inspection procedure for the crankshaft position sensor, if DTC P0335 is output again, check the following items related to the camshaft position sensor.
    1. Installation condition of the camshaft position sensor
    2. Installation condition of the camshaft
    3. Connection of the camshaft position sensor connector
  2. If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical systems.
  3. Check the engine speed. The engine speed can be checked using the intelligent tester. To check, follow the operation below:
    1. Connect the intelligent tester to the DLC3.
    2. Turn the power switch on (IG) and turn the tester on.
    3. Put the engine in inspection mode (maintenance mode) .
    4. Start the engine.
    5. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Engine Speed.
    1. The engine speed may be indicated as zero despite the engine rotating 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.
  4. 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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1.READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the tester on.

  1. Put the engine in inspection mode (maintenance mode) .

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

2.INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)

  1. Inspect the crankshaft position sensor .

  NG  
REPLACE CRANKSHAFT POSITION SENSOR
 
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:

    Tester Connection Condition Specified Condition
    D26-1 (NE) - D27-74 (NE+) Always Below 1 ?
    D26-2 (NE-) - D27-120 (NE-) Always Below 1 ?
    D26-1 (NE) or D27-74 (NE+) - Body ground Always 10 k? or higher
    D26-2 (NE-) or D27-120 (NE-) - Body ground Always 10 k? or higher
  NG  
REPAIR OR REPLACE HARNESS OR CONNECTOR
 
OK  
   

4.CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

Lexus DTC P0335 Check the crankshaft position sensor installation.

  1. Check the crankshaft position sensor installation.

    OK:

    Sensor is installed correctly.

  NG  
SECURELY REINSTALL SENSOR
 
OK  
   

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

  1. Check the teeth of the No. 1 crankshaft position sensor plate .

    OK:

    Sensor plate does not have any cracks or deformation.

  NG  
REPLACE NO. 1 CRANKSHAFT POSITION SENSOR PLATE
 
OK  
   

6.REPLACE CRANKSHAFT POSITION SENSOR

  1. Replace the crankshaft position sensor .

NEXT  
   

7.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the tester on.

  1. Clear the DTCs .

  1. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

  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 is output B

HINT:

If the engine does not start, replace the ECM.

  B  
REPLACE ECM
 
A  
   
END