Head Lamp Function IN/OUT

Head Lamp Function Block diagram

Fig 1: Head Lamp Function Block Diagram

Courtesy of HYUNDAI MOTOR CO.

Head Lamp Function In/Out List

FUNCTION REFERENCE

Function	Characteristics	Name
Function	Characteristics	Hardware Label	Spec. Designation
Input	Digital	L_HeadLampLowSW	Head Lamp Low Switch
		L_AutoLightSW	Auto Light Switch
		L_HeadLampHighSW	Head Lamp High Switch
		L_IGN1	Ignition1 power
		L_EC_DRL_OPT	Dedicated DRL option Switch
	CAN Communication	C_ALT_L	Engine is running
		C_SMKRKECMD	SMK RKE Command from Fob
		C_DRVDRSW	Driver Side Door Open/Close Status
		C_PARKING BRAKE SW	Parking Brake Switch Status
		C_CANADA_DRLSts	DRL Option Switch
		C_D_DRL_Act	Dedicated DRL ON/Off State
		C_HLampLOW_Act	Head Lamp Low On/Off State
		C_HLampHIGH_Act	Head Lamp High On/Off State
	Internal	b_HeadAutoState	Head Lamp Low On/Off request by Auto Light Control Module
Internal		b_KeyOff	L_KeyIn == Off && L_ACC == Off && L_IGN1 == Off && L_IGN2 == Off
		b_C_IGNSW	Same value with C_IGNSW(refer ECU spec.)
		b_IGN	on: b_C_IGNSW == IGN ON off: b_C_IGNSW == KEY OFF \|\| b_C_IGNSW == KEY IN \|\| b_C_IGNSW ==ACC ON \|\| b_C_IGNSW ==ST
		b_ACC	on: b_C_IGNSW == ACC ON off: b_C_IGNSW == KEY OFF \|\| b_C_IGNSW == KEY IN \|\| b_C_IGNSW ==IGN ON \|\| b_C_IGNSW ==ST
		b_START	on: b_C_IGNSW == ST off: b_C_IGNSW == KEY OFF \|\| b_C_IGNSW == KEY IN \|\| b_C_IGNSW ==ACC \|\| b_C_IGNSW ==IGN ON
		b_HeadLampHighSW	This signal reserved for separated Head Lamp High input from Passing input
		b_PassingSW	On:L_HeadLampHighSW==OnOff:L_HeadLampHighSW==Off
		b_HeadLampLowSWOn	On: L_HeadLampLowSW == On \|\| (b_HeadAutoState == On && (b_IGN == On \|\| b_START == On)) Off: L_HeadLampLowSW == Off && b_HeadAutoState == Off
		b_LOCK	P_RKECMD == Lock \|\| C_SMKRKECMD == Lock \|\| C_PassiveLock == Lock
		b_2LOCK	b_LOCK counter
		b_Unlock	b_RKEUnLock==On \|\| C_SMKRKECMD == UnLock \|\| C_PassiveUnlock== UnLock
		b_DRLOpt	DRL Option
Output	Digital	O_HeadLampLowCTRL	Head Lamp Low Output Status (Active Low)
	Internal	b_Escort	Escort activation/deactivation Status
		b_HeadLampHighOutput	On: C_HeadLampHighON = OnOff: C_HeadLampHighON = Off
		b_HeadLampLow	Internal Head Lamp Low activity
		b_HeadLampHigh	Internal Head Lamp High activity
		b_DRLOut	DRL Option activation/deactivation Status
	CAN Communication	C_CANADA_DRLON	CANADA DRL ON Command
		C_D_DRL_ON	DEDICATED DRL ON Command
		C_HeadLampLowON	Head Lamp Low On/Off command
		C_HeadLampHighON	Head Lamp High On/Off command
		C_EXTTailON	EXTTail On/Off command

Head lamp low signal control
1. Head Lamp Low control output is ON if HEAD LAMP LOW output is ON by 'Head Lamp Low switch ON ' or 'AUTO LIGHT function'.
2. Head Lamp Low control output is OFF when HEAD LAMP LOW output is ON->OFF.
Head lamp high control
Head Lamp High input and Head Lamp Passing input by M/F is Head Lamp High switch processing for single input same MULTI-FUNCTION WIRING DESCRIPTION as Head Lamp High switch only input.
1. Head Lamp High Input
  When Head Lamp High switch ON that in IGN2 ON and Head Lamp Low control output is ON by IMP, Head Lamp High is consider as input.
2. Head Lamp Passing Input
  When Head Lamp High switch ON that in IGN2 ON and Head Lamp Low control output is OFF, Head Lamp Passing is consider as input.
Multi-function wiring description

Fig 2: Multi-Function Wiring Diagram
Courtesy of HYUNDAI MOTOR CO.