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Diagnostic Trouble Code: B0253
Diagnostic Trouble Code Name: Vent/Floor Door Motor Circuit
Vehicle Make: Chevrolet
Vehicle Model: Caprice (VE)
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:
5 V Reference 2 High Voltage
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P0642, P0643, P0652, or P0653
Circuit / System Description
The engine control module (ECM) has 2 internal 5?V reference circuits called 5?V reference 1 and 5?V reference 2. Each reference circuit provides 5?V reference circuits for more than one sensor. A fault condition on one 5?V reference circuit will affect the other 5?V reference circuits connected to that reference circuit. The ECM monitors the voltage on the 5?V reference circuits.
The 5?V reference 1 circuit provides 5?V to the following sensors:
The A/C refrigerant pressure sensor
The MAP sensor
The CPP sensor
The 5?V reference 2 provides 5?V to the following sensors:
The crankshaft position sensor
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