B2473 CHEVROLET – High Beam Output Fault

 

B2473 CHEVROLET Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B2473 CHEVROLET Possible Causes

 

Faulty High/Low Headlamp Relay,High/Low Headlamp Relay harness is open or shorted,High/Low Headlamp Relay circuit poor electrical connection,Faulty Platform Zone Module (PZM)

 

B2473 CHEVROLET Description

 

High beams are commanded by Platform Zone Module (PZM) through an output to HI/LO beam relay. When headlight relay is energized, HI/LO beam relay provides power source to low beams or high beams. The Diagnostic Trouble Code (DTC) B2473 will set when commanded state of high beams does not match the feedback state. When DTC B2473 is set, PZM will continue to command state requested until IPC revokes request. DTC B2473 will clear when the commanded state matches the feedback state.