13126427

Inspection

BCM Connectors

Pin NO.	Connector A	Connector B	Connector C
1	Battery Voltage	Auto Light Signal	Room Lamp
2	IGN1	Auto Light (Ground)	-
3	Alternator 'L'	Rear Right Door Unlock Switch	Defogger Relay
4	Key In Switch	Rear Defogger Switch	Tail Lamp Relay
5	Speed Limit	Rear Fog Lamp Switch	Wiper Relay
6	Rear Left Door Lock Switch	Front Fog Lamp Switch	DRL Lock Relay 1
7	Carsh Input	Auto Light (Power)	Dead Lock Relay 1
8	Driver Door Unlock Switch	-	Horn Relay
9	Passenger Side Door Unlock Switch	-	Hazard Relay
10	Rear Wiper Switch	EMS	Key Illumination Lamp
11	-	Safety Power Window ECU	Driver Seat Belt Indicator
12	Ground	Power Window Relay	Ground(power)
13	IGN2	Front Deicer Relay	Rear Fog Relay
14	Washer Switch	Head Lamp Relay	Diagnosis
15	INT Wiper Switch	Door Lock Relay 2	Central Door Lock Indicator
16	Code Save	Security Indicator	Door Open Indicator
17	Rear Right Washer Switch	Front Fog Lamp Relay
18	Tailgate Relay	Rear Wiper Relay
19	Tailgate Handle Switch	Head Lamp Escort
20	Driver Door Switch	Passenger Seat Belt Indicator
21	Assist Door Switch
22	Rear Left Door Switch
23	Tailgate Door Switch
24	Hood Switch
25	Driver Door Key Lock Switch
26	Driver Door Key Unlock Switch
27	-
28	Tail Lamp Switch
29	INT Wiper Volume Switch
30	Speed Sensor
31	Auto Light Switch
32	Driver Seat Belt Switch
33	Head Lamp Switch
34	Assist Door Key Unlock Switch
35	Central Door Lock/unlock Switch
36	Assist Seat Belt Signal
37	Front Deicer Switch
38	MIST Switch
39	Rear Door Switch
40	-

Terminal Voltage

No	Input signal name	Logic state	ON/OFF voltage recognition LEVEL(V)	Remarks
1	B+	ON = BAT	9V~16V
2	IGN1	ON = BAT (IGN KEY is ON or START position)	7V or more/4V or less	BAT= BATTERY
3	IGN2	ON = BAT (IGN KEY is ON position)	7V or more/4V or less
4	Alt L	ON = BAT(starting state)	7V or more/4V or less
5	Key In Switch	IN = BAT (KEY insertion state)	7V or more/4V or less
6	Rear Left Door Switch	OPEN = GND	1V or less/OPEN (Reference value: 4V or more)
7	Driver door switch	OPEN = GND	1V or less/OPEN (Reference value: 4V or more)
8	Passenger side door Switch	OPEN = GND	1V or less/OPEN (Reference value: 4V or more)
9	Driver door unlock switch	LOCK = OPEN, UNLOCK = GND	1V or less/OPEN (Reference value: 4V or more)
10	Passenger side door Unlock Switch	LOCK = OPEN, UNLOCK = GND	1V or less/OPEN (Reference value: 4V or more)
11	Center door lock/unlock switch	ON=GND	1V or less/OPEN (Reference value: 4V or more)
12	Rear door switch	OPEN = GND	1V or less/OPEN (Reference value: 4V or more)
13	Tail gate switch	OPEN = GND	1V or less/OPEN (Reference value: 4V or more)
14	Hood Switch	OPEN = GND	1V or less/OPEN (Reference value: 4V or more)
15	Driver door key lock switch	ON = GND	1V or less/OPEN (Reference value: 4V or more)
16	Driver door key unlock switch	ON = GND	1V or less/OPEN (Reference value: 4V or more)
17	Passenger door key unlock switch	ON = GND	1V or less/OPEN (Reference value: 4V or more)
18	Front deicer switch	ON = GND	1V or less/OPEN (Reference value: 4V or more)
19	Washer switch	ON = BAT	7V or more/4V or less
20	Wiper INT switch	ON = BAT	7V or more/4V or less
21	Wiper INT volume switch	0V ~ 2.5V	-	0Ω~ 50KΩ
22	Rear washer switch	ON = BAT	7V or more/4V or less
23	Rear wiper Int switch	ON = BAT	7V or more/4V or less
24	Rear defogger switch	ON = GND	1V or less/OPEN (Reference value: 4V or more)
25	Tail switch	ON = GND	1V or less/OPEN (Reference value: 4V or more)
26	L_Driver seat belt switch	Fasten = OPEN, Unfasten = GND	1V or less/OPEN (Reference value: 4V or more)
27	Crash Input (Impact sensor)	ON = GND(at crash detection)	1V or less/OPEN (Reference value: 4V or more)
28	Speed sensor	Speed input = PULSE(0~5V)	1V or less/4V or more	OPEN COLLECTOR
29	Head lamp switch	ON = GND	1V or less/OPEN (Reference value: 4V or more)
30	Front fog switch	ON = GND	1V or less/OPEN (Reference value: 4V or more)
31	Rear fog switch	ON = GND	1V or less/OPEN (Reference value: 4V or more)
32	Tail gate handle switch	ON = GND	1V or less/OPEN (Reference value: 4V or more)
33	Code save unit	ON = GND	1V or less/4V or more
34	Rear right door Unlock switch	LOCK = OPEN, UNLOCK = GND	1V or less/OPEN (Reference value: 4V or more)
35	Rear left door Unlock switch	LOCK = OPEN, UNLOCK = GND	1V or less/OPEN (Reference value: 4V or more)
36	Mist switch	ON = BAT	7V or more/4V or less
37	Auto light sensor Signal	-	-

BCM Actuator Operation

SCAN tool can operates all actuators controlled by BCM by force.

NO.	BCM DISPLAY
1	DOOR LOCK RELAY
2	DOOR UNLOCK RELAY
3	TAILGATE RELEASE RELAY
4	POWER WINDOW RELAY
5	WIPER RELAY
6	HAZARD RELAY (+RK)
7	BURGLAR HORN RELAY (+RK)
8	STARTER INHIBIT RELAY (+RK)
9	TAIL LAMP RELAY/DRL UNIT
10	HEAD LAMP RELAY
11	REAR FOG RELAY
12	FRONT DEICER RELAY
13	REAR DEFOGGER RELAY
14	DRIVER SEAT BELT INDICATOR
15	IGN KEY HOLE ILLUMINATION
16	ROOM LAMP

BCM Diagnosis With Scan Tool

It will be able to diagnose defects of BCM with scan tool quickly. Scan tool can operates actuator forcefully, input/output value monitoring and self diagnosis.

Select model and menu.

Select "Current data", if you will check current data of BCM. It provides power supply status, multi function status, lamp status, door status, lock system status, wiper, auto light status and so on.