Crankshaft Position System Variation Learn
Note: The crankshaft
position sensor system variation learn procedure is required when
the following service procedures have been performed, regardless of
whether DTC P0315 00 is set:
• |
Engine control
module (ECM) replacement |
• |
Crankshaft damper
replacement |
• |
Crankshaft
Position Sensor Replacement |
• |
Any engine repairs
which disturb the crankshaft to crankshaft position sensor
relationship |
Note: The scan tool
monitors certain component signals to determine if all the
conditions are met to continue with the crankshaft position sensor
system variation learn procedure. The scan tool only displays the
condition that inhibits the procedure. The scan tool monitors the
following components:
• |
Crankshaft
Position Sensor activity - If there is a crankshaft position sensor
condition, refer to the applicable DTC that set. |
• |
Camshaft position
signal activity - If there is a camshaft position sensor signal
condition, refer to the applicable DTC that set. |
• |
Engine coolant
temperature (ECT) - If the engine coolant temperature is not warm
enough, idle the engine until the engine coolant temperature
reaches the correct temperature. |
3. |
With a scan tool, select the
Crankshaft Position System Variation Learn procedure and perform
the following: |
|
3.1 |
Observe the fuel cut-off for
the applicable engine. |
|
3.2 |
Block the drive wheels.
|
|
3.3 |
Set the parking brake.
. |
|
3.4 |
Place the vehicles
transmission in Park or Neutral. |
|
3.5 |
Turn the air conditioning
(A/C) OFF. |
|
3.6 |
Cycle the ignition from OFF to
ON. |
|
3.7 |
Apply and hold the brake pedal
for the duration of the procedure. |
|
3.8 |
Start and idle the
engine. |
|
3.9 |
Accelerate to wide open
throttle (WOT). The engine should not accelerate beyond the
calibrated fuel cut-off RPM value noted in step 3.1. Release the
throttle immediately if the value is exceeded. |
|
Note: While the learn
procedure is in progress, release the throttle immediately when the
engine starts to decelerate. The engine control is returned to the
operator and the engine responds to throttle position after the
learn procedure is complete.
|
|
3.10 |
Release the throttle when fuel
cut-off occurs. |
⇒ |
Accelerate to wide open throttle (WOT). The engine
should not accelerate beyond the calibrated fuel cut-off RPM value
noted in step 3.1. Release the throttle immediately if the value is
exceeded. |
|
Note: While the learn
procedure is in progress, release the throttle immediately when the
engine starts to decelerate. The engine control is returned to the
operator and the engine responds to throttle position after the
learn procedure is complete.
|
4. |
The scan tool displays Learn
Status: Learned this Ignition. If the scan tool indicates that DTC
P0315 00 (LDE/2H0 only) ran and passed, the crankshaft position
sensor variation learn procedure is complete. If the scan tool
indicates DTC P0315 00 (LDE/2H0 only) failed or did not run, refer
to
DTC P0315 . If any other DTCs set, refer to
Diagnostic Trouble Code (DTC) List - Vehicle for the applicable
DTC that set. |
5. |
Turn OFF the ignition for 30 s
after the learn procedure is completed successfully. |
|