Combination Switch Inspection According to Self-Diagnostic Results

WARNING: This page is about a different car, the 2003 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

SELF-DIAGNOSTIC RESULT CHECK

CAUTION: If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be detected in self-diagnosis depending on control unit which carry out CAN communication.

Connect to CONSULT-II, and select "BCM" on "SELECT SYSTEM" screen.
Select "BCM control unit" on "SELECT WORK ITEM" screen, and select "SELF-DIAG RESULTS".
Check display content in self-diagnostic results.

COMBINATION SWITCH INSPECTION CHART (1 OF 2)

CONSULT-II display code	Self-diagnostic result content	Malfunctioning switch system	Detection conditions	Possible causes
B2049	OPEN DETECT 1	In the case you are not able to turn on the switch by pattern 1 or 2. Pattern 1 FRONT WIPER HI Intermittent control 1 RR WIPER INT Intermittent control 2 Pattern 2 FR WASHER FRONT WIPER LOW TURN LH TURN RH	BCM terminal No. 48 (Input 1) does not change. (Open circuit in diagnosis 1 system line or open malfunction in output 1 transistor.)	Harness between BCM and combination switch Wiper switch BCM
B2050	OPEN DETECT 2	In the case you are not able to turn on the switch by pattern 1 or 2. Pattern 1 FR WASHER RR WASHER Intermittent control 3 RR WIPER LOW Pattern 2 FRONT WIPER HI FRONT WIPER INT PASSING HEAD LAMP 1	BCM terminal No. 49 (Input 2) does not change. (Open circuit in diagnosis 2 system line or open malfunction in output 2 transistor.)	Harness between BCM and combination switch Wiper switch BCM
B2051	OPEN DETECT 3	In the case you are not able to turn on the switch by pattern 1 or 2. Pattern 1 FRONT WIPER LOW FRONT WIPER INT AUTO LIGHT Pattern 2 Intermittent control 1 RR WASHER HEAD LAMP 2 HI BEAM	BCM terminal No. 50 (Input 3) does not change. (Open circuit in diagnosis 3 system line or open malfunction in output 3 transistor.)	Harness between BCM and combination switch Wiper switch (Front wiper Lo, INT) BCM

CONSULT-II display code

Self-diagnostic result content

Malfunctioning switch system

Detection conditions

Possible causes

B2049

OPEN DETECT 1

In the case you are not able to turn on the switch by pattern
1 or 2.
Pattern 1

FRONT WIPER HI
Intermittent control 1
RR WIPER INT
Intermittent control 2

Pattern 2

FR WASHER
FRONT WIPER LOW
TURN LH
TURN RH

BCM terminal No. 48 (Input 1) does not change. (Open circuit in diagnosis 1 system line or open malfunction in output 1 transistor.)

Harness between BCM and combination switch
Wiper switch
BCM

B2050

OPEN DETECT 2

In the case you are not able to turn on the switch by pattern
1 or 2.
Pattern 1

FR WASHER
RR WASHER
Intermittent control 3
RR WIPER LOW

Pattern 2

FRONT WIPER HI
FRONT WIPER INT
PASSING
HEAD LAMP 1

BCM terminal No. 49 (Input 2) does not change. (Open circuit in diagnosis 2 system line or open malfunction in output 2 transistor.)

Harness between BCM and combination switch
Wiper switch
BCM

B2051

OPEN DETECT 3

In the case you are not able to turn on the switch by pattern
1 or 2.
Pattern 1

FRONT WIPER LOW
FRONT WIPER INT
AUTO LIGHT

Pattern 2

Intermittent control 1
RR WASHER
HEAD LAMP 2
HI BEAM

BCM terminal No. 50 (Input 3) does not change. (Open circuit in diagnosis 3 system line or open malfunction in output 3 transistor.)

Harness between BCM and combination switch
Wiper switch (Front wiper Lo, INT)
BCM

COMBINATION SWITCH INSPECTION CHART (2 OF 2)

CONSULT-II display code	Self-diagnostic result content	Malfunctioning switch system	Detection conditions	Possible causes
B2052	OPEN DETECT 4	In the case you are not able to turn on the switch by pattern 1 or 2. Pattern 1 TURN LH PASSING HEAD LAMP 2 FRONT FOG Pattern 2 RR WIPER INT Intermittent control 3 AUTO LIGHT Lighting switch 1st position	BCM terminal No. 51 (Input 4) does not change. (Open circuit in diagnosis 4 system line or open malfunction in output 4 transistor.)	Harness between BCM and combination switch Lighting switch BCM
B2053	OPEN DETECT 5	In the case you are not able to turn on the switch by pattern 1 or 2. Pattern 1 TURN RH HEAD LAMP 1 HI BEAM TAIL LAMP Pattern 2 Intermittent control 2 RR WIPER LOW FR FOG	BCM terminal No. 52 (Input 5) does not change. (Open circuit in diagnosis 5 system line or open malfunction in output 5 transistor.)	Harness between BCM and combination switch Lighting switch BCM
B2054	HEADLAMP 1 SW NG	HEAD LAMP 1 malfunction	Headlamp 1 switch OFF Headlamp 2 switch ON	Lighting switch
B2055	HEADLAMP 2 SW NG	HEAD LAMP 2 malfunction	Headlamp 1 switch ON Headlamp 2 switch OFF	Lighting switch

Display content

No malfunction : INSPECTION END
Malfunction in diagnosis system : GO TO 2.
Malfunction in headlamp switch system : Replace lighting switch.

CHECK HARNESS

Disconnect BCM connector and combination switch connector.
Check continuity between BCM harness connector of suspect system and combination switch harness connector terminals.

BCM HARNESS CHECK CHART

Self-diagnostic result content	Terminals					Continuity
	BCM (+)			Combination switch (-)
	Connector	Terminal (Wire color)		Connector	Terminal (Wire color)
OPEN DETECT 1	M36	Input 1	48 (L/W)	M29	1 (L/W)	Yes
OPEN DETECT 1		Output 1	47 (R/W)		6 (R/W)
OPEN DETECT 2		Input 2	49 (G/B)		2 (G/B)
OPEN DETECT 2		Output 2	40 (R/B)		7 (R/B)
OPEN DETECT 3		Input 3	50 (LG/R)		3 (LG/R)
OPEN DETECT 3		Output 3	41 (R/G)		10 (R/G)
OPEN DETECT 4		Input 4	51 (G/Y)		4 (G/Y)
Output 4		42 (P/L)	9 (P/L)
OPEN DETECT 5		Input 5	52 (LG/B)		5 (LG/B)
Output 5		43 (R)	8 (R)

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

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

OK or NG

OK : GO TO 3.
NG : Repair harness.

CHECK 1: COMBINATION SWITCH

Connect combination switch connector.
Check continuity for combination switch harness connector between input and output terminals of applicable malfunctioning system.

COMBINATION SWITCH CHECK CHART

Self-diagnostic result content	Combination switch			Continuity
	Connector	Input (-)	Output (+)
	Connector	Terminal (Wire color)	Terminal (Wire color)
OPEN DETECT 1	M29	1 (L/W)	6 (R/W)	Yes
OPEN DETECT 2		2 (G/B)	7 (R/B)
OPEN DETECT 3		3 (LG/R)	10 (R/G)
OPEN DETECT 4		4 (G/Y)	9 (P/L)
OPEN DETECT 5		5 (LG/B)	8 (R)

Fig 2: Checking Continuity For Combination Switch Harness Connector Between Input And Output Terminals

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

OK or NG

OK : GO TO 4.
NG : GO TO 6.

CHECK BCM INPUT TERMINAL VOLTAGE

Connect BCM connector, and check BCM input terminal voltage of suspect system.

BCM INPUT TERMINAL VOLTAGE CHART

Self-diagnostic result content	Terminals			Voltage
	BCM
	Connector	Terminal (Wire color)
OPEN DETECT 1	M36	Input 1	48 (L/W)	4.5V or more
OPEN DETECT 2		Input 2	49 (G/B)
OPEN DETECT 3		Input 3	50 (LG/R)
OPEN DETECT 4		Input 4	51 (G/Y)
OPEN DETECT 5		Input 5	52 (LG/B)

Fig 3: Checking BCM Input Terminal Voltage

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

OK or NG

OK : GO TO 4.
NG : Replace BCM.

CHECK BCM OUTPUT TERMINAL

Connect combination switch connector, and check BCM output terminal voltage waveform of applicable malfunctioning system.

BCM OUTPUT TERMINAL VOLTAGE CHART

Self-diagnostic result content	Terminals
	BCM
	Connector	Terminal (Wire color)
OPEN DETECT 1	M36	Output 1	47 (R/W)
OPEN DETECT 2		Output 2	40 (R/B)
OPEN DETECT 3		Output 3	41 (R/G)
OPEN DETECT 4		Output 4	42 (P/L)
OPEN DETECT 5		Output 5	43 (R)

OK or NG

OK : Combination switch malfunction, go to 5.
NG : Replace BCM.

Fig 4: Checking BCM Output Terminal Voltage

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

CHECK 2: COMBINATION SWITCH

Following the table below, check switches by procedure of appropriate malfunctioning system.

COMBINATION SWITCH CHECK CHART

Self-diagnostic result content	Procedure
Self-diagnostic result content	1	2		3	4		5	6		7
OPEN DETECT 1	Wiper switch replacement	Confirm self-diagnostic results again.	OK	INSPECTION END	-	-	-	-	-	-
OPEN DETECT 1	Wiper switch replacement	Confirm self-diagnostic results again.	NG	Confirm symptom again.	-	-	-	-	-	-
OPEN DETECT 2	Wiper switch replacement	Confirm self-diagnostic results again.	OK	INSPECTION END	-	-	-	-	-	-
OPEN DETECT 2	Wiper switch replacement	Confirm self-diagnostic results again.	NG	Confirm symptom again.	-	-	-	-	-	-
OPEN DETECT 3	Wiper switch replacement	Confirm self-diagnostic results again.	OK	INSPECTION END	Confirm self-diagnostic results again.	OK	INSPECTION END	Confirm self-diagnostic results again.	OK	INSPECTION END
OPEN DETECT 3	Wiper switch replacement	Confirm self-diagnostic results again.	NG	Lighting switch replacement	Confirm self-diagnostic results again.	NG	Switch base replacement	Confirm self-diagnostic results again.	NG	Confirm symptom again.
OPEN DETECT 4	Lighting switch replacement	Confirm self-diagnostic results again.	OK	INSPECTION END	Confirm self-diagnostic results again.	OK	INSPECTION END	Confirm self-diagnostic results again.	OK	INSPECTION END
OPEN DETECT 4	Lighting switch replacement	Confirm self-diagnostic results again.	NG	Wiper switch replacement	Confirm self-diagnostic results again.	NG	Switch base replacement	Confirm self-diagnostic results again.	NG	Confirm symptom again.
OPEN DETECT 5	Lighting switch replacement	Confirm self-diagnostic results again.	OK	INSPECTION END	Confirm self-diagnostic results again.	OK	INSPECTION END	Confirm self-diagnostic results again.	OK	INSPECTION END
OPEN DETECT 5	Lighting switch replacement	Confirm self-diagnostic results again.	NG	Wiper switch replacement	Confirm self-diagnostic results again.	NG	Switch base replacement	Confirm self-diagnostic results again.	NG	Confirm symptom again.

: INSPECTION END