P0315 No Crank Sensor Learned
September 12, 2017
Add Comment
P0315 No Crank Sensor Learned - The Crankshaft Position System variation learn feature is used to calculate reference errors caused by slight tolerance variations in the crankshaft, tone wheel and the crankshaft position sensor. The calculated error allows the Powertrain Control Module (PCM) to accurately compensate for reference variations.
The crankshaft position system variation compensating values are learned and stored in the PCM memory during a decel fuel shutoff event. If the actual crankshaft variation in not within the crankshaft position systems compensating values stored in the PCM, DTC P0300 may set. If the CKP system variation values are not stored in the PCM memory, DTC P0305 sets. When monitored P0315 code is under closed throttle decel and A/C off. Engine Coolant Temperature sensor above 75°C (167°F). Engine start time is greater than 50 seconds. Set conditions one of the CKP sensor target windows has more than 2% variance from the reference. One trip fault, three good trips to turn off the MIL.
The crankshaft position system variation compensating values are learned and stored in the PCM memory during a decel fuel shutoff event. If the actual crankshaft variation in not within the crankshaft position systems compensating values stored in the PCM, DTC P0300 may set. If the CKP system variation values are not stored in the PCM memory, DTC P0305 sets. When monitored P0315 code is under closed throttle decel and A/C off. Engine Coolant Temperature sensor above 75°C (167°F). Engine start time is greater than 50 seconds. Set conditions one of the CKP sensor target windows has more than 2% variance from the reference. One trip fault, three good trips to turn off the MIL.
Possible Causes P0315 Code
- Tone wheel/pulse ring.
- Wire harness.
- Crankshaft position sensor.
Diagnostic test P0315 No Crank Sensor Learned
Step 1. Active DTC
Turn the ignition on, with the scan tool, select view DTC. Copy DTC and freeze frame information. Operate the vehicle under conditions similiar to which the DTC was set. It may be necessary to test drive the vehicle within the DTC monitoring conditions. It may take up to three 60-40 mph decels in order for this DTC to set.
Does the DTC reset while cranking or during the test drive?
Yes, go to step 2.
No, perform the the PCM intermittent condition.
Step 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 conenctors. Look for broken, bent, pushed out, or corroded terminals. Verify that theere is good pin to terminal contact in the crank position sensor and powertrain Control Module connectors. Make sure the crankshaft position sensor is properly installed and mounting bolts are torqued to the proper specification.
Were any of the above conditions present?
Yes, repair as necessary.
No, go to step 3.
Step 3. Tone wheel/flex plate inspection
Remove the crankshaft position sensor. Inspect the tone wheel/plex plate slots for damage, foreign material, or excessive movement.
Were any problems found?
Yes, repair or replace the tone wheel/plex plate as necessary.
No, go to step 4.
Step 4. Crankshaft position sensor
If there are no possible causes remaining, view repair.
Repair, replace the crankshaft position sensor.
0 Response to "P0315 No Crank Sensor Learned"
Post a Comment