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A crankshaft variation relearn must be performed if: A diagnostic trouble code of P1336 is present. The computer has been replaced or re-programmed. The crankshaft position sensor has been replaced. The engine, harmonic balancer, clutch, or flywheel have been: disassembled, removed, or replaced. The crankshaft position variation
learning feature enables the computer to compensate for part manufacturing tolerances. 1. Set the parking brake and block the drive wheels. Make sure that the hood is closed. 2. Start the engine and make sure that the engine coolant temperature is at least 158 degrees F. (70 degrees C.) 3. Turn the engine off for at least 10 seconds.
4. Select the crankshaft position variation learn procedure (CASE Learn)on your scan tool. 5. Make sure that the transmission is in Park. Start the engine. 6. Apply the brakes and hold the pedal firmly. 7. Follow the scan tool instructions. Diagram A, All Errors could be a result of the RS232 cable. Make sure that the modular end of the cable (BDM Side) is secure and no strain is placed on the cable. Chevrolet 2001 LD Truck Engine troubleshooting. factory service and repair manual complement.
Tags : crankshaft position sensor, engine coolant temperature, drive wheels, engine troubleshooting, rs232 cable, scan tool, trouble code, crankshaft, fuel systems, flywheel, coolant, ld, clutch, complement, brakes
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