Fuel System > Engine Control System > P0335 Crankshaft Position Sensor \

Component Location

General Description

The Crankshaft Position Sensor (CKPS) is a magnetic field sensitive type sensor that generates voltage using a sensor and a target wheel mounted on the crankshaft; there are 58 slots in the target wheel where one is longer than the others.

During one crankshaft rotation there are 58 rectangular signals and one longer signal. The PCM calculates engine RPM by using the sensor's signal and controls the injection duration and the ignition timing. Using the signal differences caused by the longer slot, the PCM identifies which cylinder is at top dead center.

DTC Description

Checking reference signals from CKPS under detecting condition, if any signal is not detected for more than 0.15 sec., PCM sets P0335. MIL(Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

•	Check reference wave during cranking

•	Poor connection

•	Open in harness

•	CKP sensor

•

PCM

Enable Conditions

•	IG "ON", Cranking or engine-off during driving

•	No DTC related to CAM

•	Camshaft positon sensor state change

Threshold value

•	No reference signal over 0.15 sec.

Diagnosis Time

•

0.15 sec.

MIL On Condition

•	2 driving cycles

Specification

Resistance

700 ± 70Ω

Schematic Diagram

Signal Wavefrom And Data

Monitor DTC Status

Check DTC Status

(1)	Connect scantool to Data Link Connector(DLC).

(2)

IG "ON".

(3)	Select "DTC" button, and then Press "DTC Status" to check DTC's information from the DTCs menu.

(4)	Read "DTC Status" parameter.

(5)

Is parameter displayed "Present fault"?

	▶ Go to "Terminal and connector inspection" procedure.
	▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, ending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal And Connector Inspection

1.	Many malfunctions in the electrical system are caused by poor harness and terminal condition. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

2.	Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure
	▶ Go to "Signal Circuit Inspection" procedure.

Signal Circuit Inspection

■ Check voltage

1.	IG "OFF" and disconnect CKPS connector.

2.	IG "ON" and ENG "OFF"

3.	Measure voltage between low signal terminal of CKPS harness connector and chassis ground.

Measure voltage between high signal terminal of CKPS harness connector and chassis ground.

Specification : Approx. 1.4V

Is the measured voltage within specification?

	▶ Go to "Component Inspection" procedure.
	▶ Go to "Check open in harness" as follows.

■ Check open in harness

1.	IG "OFF" and disconnect CKPS connector and PCM connector.

2.	Measure resistance between low signal terminal of CKPS harness connector and CKPS low signal terminal of PCM harness connector.

Measure resistance between high signal terminal of CKPS harness connector and CKPS high signal terminal of PCM harness connector.

Specification : Below 1Ω

Is the measured resistance within specification?

	▶ Go to "Component Inspection" procedure.
	▶ Repair open in harness, and go to "Verification of Vehicle Repair" procedure.

Component Inspection

■ Check CKPS

1.	IG "OFF" and disconnect CKPS connector.

Measure resistance between low signal and high signal terminals of CKPS connector.(Component side)

Specifiation : 700 ± 70Ω

Is the measured resistance within specification?

	▶ Go to "Check signal waveform of CKPS" as follows.
	▶ Substitute with a known - good CKPS and check for proper operation. If the problem is corrected, replace CKPS and go to "Verification of Vehicle Repair" procedure.

■ Check signal waveform of CKPS

1.	IG "OFF" and connect scantool.

2.	ENG "ON" and Measure signal waveform at signal terminal of CKPS. Reference signal waveform :

Is the measured signal waveform normal?

	▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary, and go to "Verification of Vehicle Repair" procedure.
	▶ Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.

There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. After testing PCM on the vehicle, use this function to reuse the PCM on the others

Verification Of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.

1.	Connect scantool and select "DTC" button.

2.	Press "DTC Status" button and confirm that "DTC Readiness Flag" indicates "Completed". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions

3.	Read "DTC Status" parameter

Is parameter displayed "History(Not Present) fault"?

	▶ System performing to specification at this time. Clear the DTC
	▶ Go to the applicable troubleshooting procedure.