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File name M31f3 Engine Controls 152-279.pdf

1F ­ 152 ENGINE CONTROLS MAA1F180 DIAGNOSTIC TROUBLE CODE (DTC) ­ P0336 58X CRANKSHAFT POSITION SENSOR NO PLAUSIBLE SIGNAL Circuit Description The 58X reference signal is produced by the crankshaft position (CKP) sensor. During one crankshaft revolution, 58 crankshaft pulses will be produced. The engine control module(ECM) uses the 58X reference signal to calculate engine rpm and CKP. The ECM constantly monitors the number of pulses on the 58X reference circuit and compares them to the number of camshaft position (CKP) signal pulses being received. If the ECM receive and incorrect number of pulses on the 58X reference circuit, DTC P0336 will set. Conditions for Setting the DTC D This DTC can be stored in "key-on" status. D Detected number of teeth is differs by 3 or higher. Action Taken When the DTC Sets D The Malfunction Indicator Lamp (MIL) will illuminate. D The ECM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records buffers. D A history DTC is stored. Conditions for Clearing the MIL/DTC D The MIL will turn off after four consecutive ignition cycles in which the diagnostic runs without a fault. D A history DTC will clear after 40 consecutive warm-up cycles without a fault. D DTC(s) can be cleared by using the scan tool. D Disconnecting the ECM battery feed for more than 10 seconds. DIAGNOSTIC AIDS An intermittent may be caused by a poor connection, rubbed-through wire insulation or a wire broken inside the insulation. Check for : Poor connection ­ inspect the ECM harness and connectors for improper mating, broken locks, improperly formed or damaged terminals, and poor terminal-to-wire connection. Damaged harness ­ inspect the wiring harness for damage. If the harness appears to be OK, disconnect the ECM, turn the ignition ON and observe a voltmeter connected to the 58X reference circuit at the ECM harness connector while moving the connectors and the wiring harness related to the ECM. A change in voltage will indicate the location of the fault. Review the failure records vehicle mileage since the diagnostic test failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition. DAEWOO M-150 BL2 ENGINE CONTROLS 1F ­ 153 DTC P0336 ­ 58X Crankshaft Position Sensor No Plausible Signal Step 1 Action Perform an Euro On-Board Diagnostic (EOBD) System Check. Is the system check complete? Attempt to start the engine. Does the engine start? Value(s) ­ Go to Step 2 ­ Go to Step 3 1. Review and record Failure Records information. 2. Clear the DTC P0336. 3. Start the engine and idle for 1 minute. 4. Observe the diagnostic trouble codes (DTCs). Is the DTC P0336 set? 1. Disconnect the engine control module(ECM) and the crankshaft position (CKP) sensor. 2. Check for an open or a low voltage in the CKP sensor connector and the ECM harness connector. Is the problem found? Repair the open or low voltage in t