Combination Switch Inspection

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

SYSTEM CHECK

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

COMBINATION SWITCH SPECIFICATION

System 1	System 2	System 3	System 4	System 5
-	FR WASHER	FR WIPER LO	TURN LH	TURN RH
FR WIPER HI	-	FR WIPER INT	PASSING	HEAD LAMP1
INT VOLUME 1	-	-	HEAD LAMP2	HI BEAM
-	INT VOLUME 3	AUTO LIGHT	-	TAIL LAMP
INT VOLUME 2	-	-	FR FOG	-

: GO TO 2.

SYSTEM CHECK
With CONSULT-III

CAUTION: If CONSULT-III is used with no connection of CONSULT-III CONVERTER, malfunctions might be detected in self-diagnosis depending on control unit which carries out CAN communication.
1. Connect CONSULT-III and select "COMB SW" on "SELECT TEST ITEM" screen.
2. Select "DATA MONITOR".
3. Select "START" and confirm that other switches in malfunctioning system operate normally
  Example: When auto light switch is malfunctioning, confirm that "FRONT WIPER LOW" and "FRONT WIPER INT" in System 3, to which the auto light switch belongs, turn ON-OFF normally.
Without CONSULT-III

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

Example: When auto light switch is malfunctioning, confirm that "FRONT WIPER LOW" and "FRONT WIPER INT" in System 3, to which the auto light switch belongs, operate normally.

Check results

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

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

HARNESS INSPECTION

Turn ignition switch OFF.
Disconnect BCM and combination switch connectors.

Check for continuity between BCM harness connector of the suspect system and the corresponding combination switch connector terminals.

BCM HARNESS AND COMBINATION SWITCH CONNECTOR

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

Fig 1: Checking Continuity Between BCM And Combination Switch Connector Terminals And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

Check for continuity between each terminal of BCM harness connector in suspect malfunctioning system and ground.

BCM HARNESS CONNECTOR AND GROUND

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

OK or NG

OK: GO TO 4.

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

BCM OUTPUT TERMINAL INSPECTION

Turn lighting switch and wiper switch to OFF.
Set wiper dial to position 4.
Connect BCM and combination switch connectors.

Turn ignition switch ON, and check combination switch input (BCM output) terminal voltage waveform of suspect malfunctioning system.

BCM OUTPUT TERMINAL INSPECTION

Suspect system	Combination switch
	(+)
	Connector	Terminal
1	M28	Input 1	1
2		Input 2	2
3		Input 3	3
4		Input 4	4
5		Input 5	5

Fig 2: Checking BCM Output Terminal Voltage Waveform Of Suspect Malfunctioning System

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

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

NG: Replace BCM. Refer to "BCM ".

COMBINATION SWITCH INSPECTION

Referring to table below, perform combination switch inspection.

COMBINATION SWITCH SPECIFICATION

Procedure
1	2		3	4		5	6		7
Replace lighting switch.	Confirm check results.	OK	INSPECTION END	Confirm check results.	OK	INSPECTION END	Confirm check results.	OK	INSPECTION END
Replace lighting switch.	Confirm check results.	NG	Replace wiper switch.	Confirm check results.	NG	Replace switch base.	Confirm check results.	NG	Confirm symptom again.

: Inspection End.