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Diagnostic Trouble Code: 034
Diagnostic Trouble Code Name: Absence of Immobilizer Antennae/Link Error
Vehicle Make: Holden
Vehicle Model: Epica (V250)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Crankshaft Position Sensor Circuit High Duty Cycle
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P0335, P0336, or P0338
Circuit / System Description
The crankshaft position (CKP) sensor is located on the rear of bank 1 of the engine block. The CKP sensor produces an AC voltage of different amplitude and frequency depending on the velocity of the crankshaft. The CKP sensor works in conjunction with a 58X reluctor wheel that is attached to the crankshaft. Each tooth on the reluctor wheel are spaced 6 degrees apart with one span having a 12 degree space. The engine control module (ECM) uses the 12 degree space to determine top dead center (TDC) for cylinders 1 and 4. The ECM determines when cylinder 1 is on the compression stroke by monitoring the CKP sensor and the camshaft position (CMP) sensors. The ECM can synchronize the ignition timing, fuel injector timing and spark knock control based on the CKP sensor and the CMP sensor inputs. If the ECM loses the reference position to TDC, or the CKP signal is lost or erratic, one of these DTCs sets.
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