P0315

P0315-NO CRANK SENSOR LEARNED

P0315-No Crank Sensor Learned:

WHEN MONITORED
Under closed throttle decel and A/C off. ECT above 75° C (167° F). Engine start time is greater than 50 seconds.

SET CONDITION
One of the CKP sensor target windows has more than 2.86% variance from the reference. One Trip Fault. Three good trips to turn off the MIL.

POSSIBLE CAUSES
- Tone wheel/pulse ring
- Wire harness
- Crankshaft position sensor

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test

1. ACTIVE DTC

Ignition on, engine not running.
With a scan tool, clear DTCs, PCM battery disconnect to reset the PCM.
Start the engine.
If the MIL has not yet illuminated, test drive the vehicle to try to get the code to reset.

Q: Does the code reset while cranking or during the test drive?

YES: Go To 2
NO: Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition
Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test




2. WIRE HARNESS INSPECTION

Turn the ignition off.
Visually inspect the CKP wire harness. Look for any chafed, pierced, pinched, or partially broken wires.
Visually inspect the CKP wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Make sure the Crankshaft Position Sensor is properly installed and the mounting bolt(s) are torqued to the proper specification.

Q: Were any of the above conditions present?

YES: Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Go To 3

3. TONE WHEEL/FLEX PLATE INSPECTION

Remove the Crankshaft Position Sensor.
Inspect the Tone Wheel/Flex Plate slots for damage, foreign material, or excessive movement.

Q: Were any problems found?

YES: Repair or replace the Tone Wheel/Flex Plate as necessary. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Go To 4

4. CRANKSHAFT POSITION SENSOR

If there are no possible causes remaining, view repair.

Repair
Replace the Crankshaft Position Sensor. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test