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Diagnostic Trouble Code: B1103
Diagnostic Trouble Code Name: SIR Serial Communications Fault
Vehicle Make: Chevrolet
Vehicle Model: Tosca (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:
Cylinder 7 Deactivation Solenoid Control Circuit
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P3401, P3425, P3441, or P3449
Circuit / System Description
The cylinder deactivation system is used to deactivate 4?cylinders of the engine under light load driving conditions. The engine control module (ECM) commands the cylinder deactivation solenoids ON to deactivate engine cylinders 1, 7, 6, and 4, switching to 4?cylinders or V4 mode. The cylinder deactivation solenoids controls the oil flow to the appropriate valve lifters. The engine operates on 8 cylinders or V8 mode, during engine starting, engine idling, and medium to heavy throttle conditions.
Ignition voltage is supplied directly to the 4?cylinder deactivation solenoids. The engine control module (ECM) controls the 4?cylinder deactivation solenoids by grounding the control circuit with a solid state device called a driver.
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