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Diagnostic Trouble Code: 037
Diagnostic Trouble Code Name: Immobilizer Antenna Short to Ground/Open
Vehicle Make: Chevrolet
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:
CTS Rationality Fault
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTCP0116
Circuit / System Description
The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module (ECM) supplies 5?volts to the signal circuit and a ground for the ECT low reference circuit. When the ECT is low, the sensor resistance is high. When the ECT is high, the sensor resistance is low. The ECM uses this input for engine controls and enabling criteria for diagnostics. The ECM uses this High Side Coolant Rationality test to determine if the ECT input is skewed high. The internal clock of the ECM will record the amount of time the ignition is OFF. At restart the ECM will compare the temperature difference between the ECT and the intake air temperature (IAT). This DTC will only run once during the ignition cycle within the enabling conditions. Before failing this test, the ECM will perform a calculation to determine the presence of a block heater. If the ECM detects that the temperature difference is not within the calibrated range after the ignition OFF time, DTC?P0116 sets.
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