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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 output signals from CKPS every 7.8 sec. under detecting condition, if an output signal is missing or redundant for more than 1.56 sec., PCM sets P0336. 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	● Detecting extra/missing pulses between consecutive 58X reference pulses	● Poor connection ● Noise ● Short in harness ● Target wheel ● PCM
Enable Conditions	● Engine running
Threshold value	● Extra/ missing pulses 〉 2 pulses
Diagnosis Time	● Continuous (More than 1.56 sec.failure for every 7.8 sec.test)
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

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.

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

IG "OFF" and disconnect CKPS connector.

IG "ON" and ENG "OFF"

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 short in harness" as follows.

■ Check short in harness

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

Measure resistance between low(high) signal terminal of CKPS harness connector and chassis ground.(Measurement "A")

Measure resistance between low signal and high signal terminals of CKPS harness connector.(Measurement "B")

Specification : Infinite

Is the measured resistance within specification?

▶ Go to "Component Inspection" procedure.

▶ Repair short in harness, and go to "Verification of Vehicle Repair" procedure.

COMPONENT INSPECTION

■ Visually check CKPS and target wheel

IG "OFF"

Check CKPS and target wheel for deformation or damage visually.

Is the above items normal ?

▶ Go to "Check CKPS resistance" as follows.

▶ Repair or replace it, and go to "Verification of Vehicle Repair" procedure.

■ Check CKPS

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

IG "OFF" and connect scantool.

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.

note

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.

Connect scantool and select "DTC" button.

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

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.