SFI SYSTEM (w/o EGR System), Diagnostic DTC:P0335

DTC Code	DTC Name
P0335	Crankshaft Position Sensor "A" Circuit

DESCRIPTION

The crankshaft position sensor system consists of a crank angle 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 a 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 rotation. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection timing and ignition timing are controlled.

DTC No.	DTC Detection Condition	Trouble Area
P0335	Either of the following conditions is met (1 trip detection logic): No crankshaft position sensor signal to ECM while engine running Missing crankshaft position sensor signal despite camshaft position sensor signal inputs normal after engine running	Open or short in crankshaft position sensor circuit Crankshaft position sensor Crankshaft (crank angle sensor plate) ECM

DTC No.

DTC Detection Condition

Trouble Area

P0335

Either of the following conditions is met

(1 trip detection logic):

No crankshaft position sensor signal to ECM while engine running
Missing crankshaft position sensor signal despite camshaft position sensor signal inputs normal after engine running

Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Crankshaft (crank angle sensor plate)
ECM

Reference: Inspection using an oscilloscope

Tech Tips

The correct waveform is as shown.
VV1 and VV2 stand for the VVT sensor signal, and NE stands for the crankshaft position sensor signal.

Item	Content
ECM Terminal Names	Between VV1+ and VV1-, VV2+ and VV2- Between NE+ and NE-
Tester Range	5 V/DIV. 20 ms./DIV.
Condition	Idling with warm engine

Item

Content

ECM Terminal Names

Between VV1+ and VV1-, VV2+ and VV2-

Between NE+ and NE-

Tester Range

5 V/DIV.

20 ms./DIV.

Condition

Idling with warm engine

WIRING DIAGRAM

INSPECTION PROCEDURE

Tech Tips

After performing the inspection procedure for the crankshaft position sensor, if DTC P0335 is output again, check the following items related to the VVT sensor.

Installation condition of the VVT sensor
Installation condition of the camshaft
Connection of the VVT sensor connector

If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.
Check the engine speed. The engine speed can be checked using the intelligent tester. Follow the procedure below:

Connect the intelligent tester to the DLC3.
Turn the power switch on (IG).
Turn the tester on.
Put the engine in inspection mode Click here.
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Engine Speed.

The engine speed may be indicated as zero (0) 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.

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.

PROCEDURE

READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED)
1. Connect the intelligent tester to the DLC3.
2. Turn the power switch on (IG).
3. Turn the tester on.
4. Put the engine in inspection mode Click here.
5. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Engine Speed.
6. Start the engine.
7. Read the values displayed on the tester while the engine is running.
  
  Standard
  
  Correct values are displayed.
  Tech Tips
  - To check the engine speed change, display the graph on the tester.
  - If the engine does not start, check the engine speed while cranking.
  - 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
INSPECT CRANKSHAFT POSITION SENSOR Click here

OK

CHECK FOR INTERMITTENT PROBLEMS Click here
INSPECT CRANKSHAFT POSITION SENSOR
1. Inspect the crankshaft position sensor Click here.
NG
REPLACE CRANKSHAFT POSITION SENSOR Click here

OK

Standard
Correct values are displayed.

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

Disconnect the crankshaft position sensor connector.
Disconnect the ECM connector.

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

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
D21-1 - D1-76 (NE+)	Always	Below 1 Ω
D21-2 - D1-77 (NE-)	Always	Below 1 Ω

Standard Resistance (Check for Short)

Tester Connection	Condition	Specified Condition
D21-1 or D1-76 (NE+) - Body ground	Always	10 kΩ or higher
D21-2 or D1-77 (NE-) - Body ground	Always	10 kΩ or higher

Reconnect the ECM connector.
Reconnect the crankshaft position sensor connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)
1. Check the crankshaft position sensor installation condition.
  
  OK
  
  Sensor is installed correctly.
NG
SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here

OK
CHECK CRANKSHAFT (TEETH OF CRANK ANGLE SENSOR PLATE)
1. Check the teeth of the crank angle sensor plate.
  
  OK
  
  Crank angle sensor plate does not have any cracks or deformation.
NG
REPLACE CRANKSHAFT Click here

OK

REPLACE ECM Click here