Combination Switch Inspection

Referring to table below, check which system malfunctioning switch belongs to.

: Check the system to which the switch belongs, and GO TO 2.

With CONSULT-III

1. Connect CONSULT-III, and select "COMB SW" on BCM "SELECT TEST ITEM" screen.
2. Select "DATA MONITOR".
3. Select "START", and confirm that other switches in the system operate normally.

   Example: When turn signal LH is inoperative, confirm that PASSING, HEAD LAMP 2 or FRONT FOG (if equipped) turn ON-OFF normally.

Without CONSULT-III

Operate combination switch, and confirm that other switches in the system operate normally.

Example: When a turn signal switch is inoperative, confirm that FRONT WIPER LO or FRONT WIPER INT turn ON-OFF normally.

Check results 

Other switches in the system operate normally. Replace lighting switch or wiper switch.

Other switches in the system do not operate normally. GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect BCM connector and combination switch connector.
3. Check for continuity between BCM harness connector of the suspect system and the corresponding combination switch harness connector.
   CONNECTOR TERMINAL CONTINUITY SPECIFICATION
   
   

   Suspect system	A			B		Continuity
   	Connector	Terminal		Connector	Terminal
   1	M18	Input 1	6	M28	6	Yes
   		Output 1	36		1
   2		Input 2	5		7
   		Output 2	35		2
   3		Input 3	4		10
   		Output 3	34		3
   4		Input 4	3		9
   		Output 4	33		4
   5		Input 5	2		8
   		Output 5	32		5

   Fig 1: Checking Continuity Between BCM Connector Of Suspect System And Corresponding Combination Switch Connector

   
4. Check for continuity between the BCM harness connector in suspect system and ground.
   CONNECTOR TERMINAL CONTINUITY SPECIFICATION
   
   

   Suspect system	BCM			Ground	Continuity
   	Connector	Terminal
   1	M18	Input 1	6		No
   		Output 1	36
   2		Input 2	5
   		Output 2	35
   3		Input 3	4
   		Output 3	34
   4		Input 4	3
   		Output 4	33
   5		Input 5	2
   		Output 5	32

OK or NG 

OK: GO TO 4.

NG: Check harness between BCM and combination switch for open or short circuit.

Fig 2: Checking Continuity Between Of BCM Harness Connector In Suspect System And Ground

1. Connect BCM and combination switch connectors.
2. Turn ignition switch ON.
3. Turn lighting switch and wiper switch to OFF position.
4. Set wiper dial to position 4.
5. Check BCM output terminal voltage waveform of suspect system.
   CONNECTOR TERMINAL VOLTAGE SPECIFICATION
   
   

   Suspect system	Terminal			Reference value
   	(+)		(-)
   	Combination switch connector	Terminal
   1	M28	1	Ground
   2		2
   3		3
   4		4
   5		5

   Fig 3: Checking BCM Output Terminal Voltage Waveform Of Suspect System

   

OK or NG 

OK: Open circuit in combination switch, GO TO 5.

NG: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".

Referring to table below, perform combination switch inspection.

: Inspection end.