Trunk Room Lamp Switch Check

With CONSULT-III 

Check ("TRUNK SW") in "DATA MONITOR" mode with CONSULT-III.

Without CONSULT-III 

1. Turn ignition switch OFF.
2. Check voltage between BCM harness connector M19 terminal 42 and ground.
   CONNECTOR TERMINAL VOLTAGE SPECIFICATION
   
   

   Connector	Terminals		Trunk condition	Voltage (V) (Approx.)
   	(+)	(-)
   M19	42	Ground	CLOSED	Battery voltage
   			OPEN	0

OK or NG 

OK: Trunk room lamp switch circuit is OK.

NG: GO TO 2.

Fig 1: Checking Voltage Between BCM Harness Connector M19 Terminal 42 And Ground

1. Turn ignition switch OFF.
2. Disconnect trunk room lamp switch connector.
3. Check continuity between trunk room lamp switch terminals 1 and 2.
   CONNECTOR TERMINAL CONTINUITY SPECIFICATION
   
   

   Terminals		Trunk condition	Continuity
   1	2	CLOSED	No
   		OPEN	Yes

OK or NG 

OK: GO TO 3.

NG: Replace trunk room lamp switch.

Fig 2: Checking Continuity Between Trunk Room Lamp Switch Terminals 1 And 2

1. Disconnect BCM connector M19.
2. Check continuity between BCM harness connector M19 (A) terminal 42 and trunk room lamp switch harness connector B57 (B) terminal 1.

   42 - 1 : Continuity should exist. 

   Fig 3: Checking Continuity Between BCM Harness Connector M19 Terminal 42 And Ground

   
3. Check continuity between BCM harness connector M19 (A) terminal 42 and ground.

   42 - Ground : Continuity should not exist. 

OK or NG 

OK: GO TO 4.

NG: Repair or replace harness between BCM and trunk room lamp switch.

Check continuity between trunk room lamp switch harness connector B57 terminal 2 and ground.

2 - Ground : Continuity should exist. 

OK or NG 

OK: Check connection of harness and connector.

NG: Repair or replace trunk room lamp switch ground circuit.

Fig 4: Checking Continuity Between Trunk Room Lamp Switch Harness Connector B57 Terminal 2 And Ground