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 ECM 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 ECM identifies which cylinder is at top dead center.

DTC DESCRIPTION

Checking tooth error correction under detecting condition, if the TEC is out of Threshold value, PCM sets P0315.

DTC DETECTING CONDITION

Item

Detecting Condition

Possible cause

DTC Strategy

●

This DTC indicates that crankwheel tooth error has not been learned.

●

CKPS

●

Target wheel

●

PCM

Enable Conditions

●

12 ≤ Ignition Voltage ≤16 (V)

●

10 ≤ Engine load〈 90 (%)

●

1500 ≤ engine speed ≤ 4000 (rpm)

●

Vehicle speed 〈 5kph( 3.106856 mph)

●

Tec RPM stability timer 〉10sec

●

0℃(32°F)〈 coolant temp〈 110℃(230°F)

●

Not active disabling faults

●

Not key on disabling faults

Threshold value

●

Distance driven without learning tooth error ≥ 4000km(2485.484769 mile) or

●

Maximum allowed number of tooth error correction samples taken in the On The Road(OTR)learning mode〈 250 or

●

Sum of tooth error factors variation outside calibratable range ≥ 250

Diagnosis Time

●

Continuous

MIL On Condition

●

1 driving cycles

COMPONENT INSPECTION
1.

Visually check CKPS and target wheel

(1)

IG "OFF"

(2)

Check CKPS and target wheel for deformation or damage visually

(3)

Is the above items normal ?

▶ 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. Before or 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.

Monitor and record the Freeze Frame Data for the Diagnostic Trouble Code(DTC) which has been diagnosed.

2.

Using a Scantool, Clear the DTCs

3.

Operate the vehicle within conditions noted in the freeze frame data or enable conditions

4.

Monitor that all rediness test have been verified as " Complete "

5.

Are any DTCs present ?

▶ Go to the applicable troubleshoooting procedure.

▶ System is performing to specification at this time.

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