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Diagnostic Trouble Code: 0033
Diagnostic Trouble Code Name: Pass. Deployment Loop Short to Batt. Current
Vehicle Make: Holden
Vehicle Model: Commodore (VZ)
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:
Engine Coolant Temperature Below Thermostat Regulating
Temperature
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P0128
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?V to the engine coolant temperature (ECT) sensor signal circuit and a ground for the low reference circuit. The purpose of this diagnostic is to analyze the performance of the thermostat by comparing the measured engine coolant temperature (ECT) sensor to a modeled engine coolant temperature using information from the following inputs:
Engine coolant temperature (ECT) sensor
Engine load
Intake air temperature (IAT)
Manifold absolute pressure (MAP)
Vehicle speed
The ECM uses the start-up ECT and the start-up IAT to begin the diagnostic calculation. The air flow into the engine is accumulated, and vehicle speed, distance, engine load, and engine run time are also factored in to determine if the ECT does increase normally and then maintains that temperature within a calibrated range of the modeled ECT.
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