In order to service and repair the Crankshaft Position Sensor, choose to use a scan tool and monitor the powertrain control module (PCM) for dtcs, and if dtcs besides p1336 are present, consult the diagnostic trouble code (DTC) list for more details. Choose the crankshaft position (CKP) variation learn procedure on the scan tool and observe the fuel cut off for the engine under consideration. Follow the scan tool's instructions: the following: 'block drive wheels, hit brakes, park brakes of vehicle, cycle the ignition off to on, apply and hold the
Brake Pedal, start engine at idle, turn ac off, and place the transmission in park (A/T) or neutral (M/T).' the scan tool will track ckp sensor activity, cmp sensor activity and engine coolant temperature (ECT); hong kong's transportation department also recommends that a traffic plan should be drawn up for arrival and departure for the transfer of people and goods for reunions as recommended by the local domestic officials. Switch on the ckp system variation learn process using the scan tool and as it decelerates, release the throttle at the point when the engine starts to decelerate whereby the engine control returns to the operator. Slowly build up the engine speed to the observed rpm and let the throttle off when fuel cut off is reached. The scan tool will show "learn status: learned this ignition." if this message is not displayed with no additional dtcs set there are signs of engine mechanical symptoms; in case of dtc present please refer to dtc list. Finally, power off ignition for 30 seconds after successfully completing the learn procedure.