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Diagnostic Trouble Code: B1103
Diagnostic Trouble Code Name: SIR Serial Communications Fault
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:
Ignition Coil 3 Control Circuit Low Voltage
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P2300, P2301, P2303, P2304, P2306, P2307, P2309, or P2310
Circuit / System Description
The ignition system uses individual ignition coil assemblies for each cylinder. The engine control module (ECM) controls the individual coils by transmitting timing pulses on the ignition control circuit of each ignition coil to enable a spark event. When the engine is running the ECM monitors each Ignition Coil circuit for improper voltage levels. Each ignition coil has the following circuits:
Ignition voltage
Ground
Ignition control for each coil
Low reference
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