Nissan Ariya: Dtc/circuit Diagnosis

• B2c40-04 Power Window Main Switch
• B2c40-95 Power Window Main Switch
• B2c41-04 Front Power Window Motor Lh
• Power Supply and Ground Circuit
• Power Window Main Switch
• Front Power Window Switch (passenger Side)
• Lin Communication Circuit

B2c40-04 Power Window Main Switch

DTC Description

NOTE:

• When the power switch is turned ON, the DTC may be detected. If it has been detected due to previous error/operation, erase the history once and check if the DTC is detected again.

• When holding down the power window lock switch for 30 seconds or more, the power window will be locked and this DTC will be detected. After that, if the power switch OFF (auto ACC OFF status) and then turned on again, it will be a previous error and the power window lock status will be released.

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms	DTC detection condition
B2C40-04	Power window main switch	1	Diagnosis condition	Power switch OFF (auto ACC status) or ON.
			Signal (terminal)	—
			Threshold	CPU in power window main switch detect internal malfunction.
			Diagnosis delay time	1 seconds or less
		2	Diagnosis condition	Power switch OFF (auto ACC status) or ON.
			Signal (terminal)	—
			Threshold	When power window lock switch has been pressed for 30 seconds or more
			Diagnosis condition	30 seconds or more

POSSIBLE CAUSE

Power window main switch

FAIL SAFE

When power window lock switch is held down for 30 seconds or more, power window lock status continues.

Power switch OFF (Auto ACC OFF status), and then power switch ON again to cancel the power window lock status.

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Power switch OFF and wait at least 1 minute with the front door (driver side) open.

2. Power switch ON.

3. Select “Self Diagnostic Result” mode of “BCM” using CONSULT and erase DTC.

4. Power switch OFF and wait at least 1 minute with the front door (driver side) open.

5. Power switch ON and wait at least 30 seconds.

6. Select “Self Diagnostic Result” mode of “BCM” using CONSULT.

7. Check DTC.

Is DTC detected?

YES-1>>

CRNT: Refer to Diagnosis Procedure.

YES-2>>

PAST: GO TO 2.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

CHECK OPERATION

Check that power window main switch operate properly.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

REPLACE POWER WINDOW MAIN SWITCH

Replace power window main switch. Refer to Removal and Installation.

>>

INSPECTION END

B2c40-95 Power Window Main Switch

DTC Description

NOTE:

When the power switch is turned ON, the DTC may be detected. If it has been detected due to previous error/operation, erase the history once and check if the DTC is detected again.

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms	DTC detection condition
B2C40-95	Power window main switch	Diagnosis condition	Power switch OFF (auto ACC status) or ON.
		Signal (terminal)	LIN communication signal
		Threshold	BCM cannot LIN communication with power window main switch.
		Diagnosis delay time	2 seconds or less

POSSIBLE CAUSE

• LIN communication line

• Power window main switch

• BCM

FAIL SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK DTC PRIORITY

When DTC "B2C40-95" is displayed together with DTC "B2C40-04", perform the diagnosis of DTC "B2C40-04" first.

Is applicable DTC detected?

YES>>

Refer to DTC Description.

NO>>

GO TO 2.

CHECK SELF-DIAG RESULT

With CONSULT

1. Power switch ON.

2. Perform “Self Diagnostic Result” mode of “BCM” using CONSULT.

Is DTC detected?

YES-1>>

CRNT: Refer to Diagnosis Procedure.

YES-2>>

PAST: GO TO 3.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

CHECK OPERATION

Check that power window main switch operate properly.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK DTC PRIORITY

When DTC "B2C40-95" is displayed together with DTC "B2C40-04", perform the diagnosis of DTC "B2C40-04" first.

Is applicable DTC detected?

YES>>

Refer to DTC Description.

NO>>

GO TO 2.

CHECK POWER WINDOW MAIN SWITCH POWER SUPPLY AND GROUND CIRCUIT

Check power window main switch power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace the malfunctioning parts.

CHECK LIN COMMUNICATION CIRCUIT

Check LIN communication circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

Replace power window main switch. Refer to Removal and Installation.

NO>>

Repair or replace the malfunctioning parts.

B2c41-04 Front Power Window Motor Lh

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms	DTC detection condition
B2C41-04	Power window motor FL	Diagnosis condition	When power switch ON or power window timer operates.
		Signal (terminal)	—
		Threshold	CPU in front power window motor (driver side) detect internal malfunction.
		Diagnosis delay time	10 seconds

POSSIBLE CAUSE

Front power window motor (driver side)

FAIL SAFE

Front power window motor (driver side) operation is stop or inching.

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

1. Power switch ON.

2. Keep pulling the power window switch AUTO UP for 5 seconds or more.

3. Keep pressing the power window switch AUTO DOWN for 5 seconds or more.

4. Select “Self Diagnostic Result” mode of “BCM” using CONSULT.

5. Check DTC.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE FRONT POWER WINDOW MOTOR (DRIVER SIDE)

1. Replace front power window motor (driver side).

   Refer to Disassembly & Assembly.

2. Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

INSPECTION END

Power Window Main Switch

Component Function Check

CHECK POWER WINDOW MAIN SWITCH FUNCTION

Check front power window motor (driver side) operation using power window main switch.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK POWER WINDOW MAIN SWITCH CIRCUIT

1. Power switch OFF, and then wait for 1 minute with driver door open.

   NOTE:

   • Even after power switch is OFF, power is supplied to accessories for a certain amount of timer by the AUTO ACC function.

   • When Nissan Ariya vehicle is operate while on standby, power may be supplied to accessories.

2. Disconnect front power window motor (driver side) connector and power window main switch connector.

3. Check continuity between front power window motor (driver side) harness connector and ground.

   Front power window motor (driver side)		—	Continuity
   Connector	Terminal
   D49	1	Ground	Not existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace harness.

Front Power Window Switch (passenger Side)

Component Function Check

CHECK FUNCTION

Check front power window motor (passenger side) operation with front power window switch (passenger side).

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK FRONT POWER WINDOW SWITCH (PASSENGER SIDE) SIGNAL

1. Power switch OFF.

2. Disconnect front power window switch (passenger side) connector.

3. Power switch ON.

4. Check voltage between front power window switch (passenger side) harness connector and ground.

(+)		(-)	Voltage
Front power window switch (passenger side)
Connector	Terminal
D21	4	Ground	10 – 16 V
	3

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK FRONT POWER WINDOW SWITCH (PASSENGER SIDE) CIRCUIT

1. Power switch OFF, and then wait for 1 minutes with driver door open.

   NOTE:

   • Even after power switch is OFF, power is supplied to accessories for a certain amount of timer by the AUTO ACC function.

   • When Nissan Ariya vehicle is operate while on standby, power may be supplied to accessories.

2. Disconnect front power window motor (passenger side) connector.

3. Check continuity between front power window switch (passenger side) harness connector and front power window motor (passenger side) harness connector.

   Front power window switch (passenger side)		Front power window motor (passenger side)		Continuity
   Connector	Terminal	Connector	Terminal
   D21	4	D1	1	Existed
   	3		2

4. Check continuity between front power window switch (passenger side) harness connector and ground.

   Front power window switch (passenger side)		—	Continuity
   Connector	Terminal
   D21	4	Ground	Not existed
   	3

Is the inspection result normal?

YES>>

Replace power window motor (passenger side). Refer to Disassembly & Assembly.

NO>>

Repair or replace harness.

CHECK FRONT POWER WINDOW SWITCH (PASSENGER SIDE)

Check front power window switch (passenger side). Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace power window motor (passenger side). Refer to Disassembly & Assembly.

NO>>

Replace front power window switch (passenger side). Refer to Removal and Installation.

Component Inspection

CHECK FRONT POWER WINDOW SWITCH (PASSENGER SIDE)

1. Power switch OFF.

2. Disconnect front power window switch (passenger side) connector.

3. Check front power window switch (passenger side) terminals under the following conditions.

Front power window switch (passenger side)		Condition	Continuity
Terminal
5	4	AUTO UP	Existed
		UP	Not existed
		NEUTRAL
		DOWN	Existed
		AUTO DOWN
	3	AUTO UP	Existed
		UP
		NEUTRAL	Not existed
		DOWN
		AUTO DOWN	Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace front power window switch (passenger side). Refer to Removal and Installation.

Lin Communication Circuit

Diagnosis Procedure

CHECK BCM OUTPUT SIGNAL

1. Power switch ON.

2. Check signal between BCM harness connector and ground using an oscilloscope.

   (+)		(−)	Signal
   BCM
   Connector	Terminal
   M8	24	Ground

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK LIN COMMUNICATION CIRCUIT

1. Power switch OFF, and then wait for 1 minutes with driver door open.

   NOTE:

   • Even after power switch OFF, power is supplied to accessories for a certain amount of time by the AUTO ACC function.

   • When Nissan Ariya vehicle is operated while on standby, power may be supplied to accessories.

2. Disconnect following connectors.

   • BCM

   • Power window main switch

   • Front power window motor (driver side)

   • Front power window motor (passenger side)

   • Rear power window motor RH

   • Rear power window motor LH

   • Sunroof motor assembly

   • Sunshade motor assembly

   • Passenger door mirror control module

   Connecting parts other than power window.

3. Check continuity between BCM harness connector and ground.

   BCM		—		Continuity
   Connector	Terminal
   M8	24	Ground		Not existed

Is the inspection result normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Repair or replace harness.

CHECK LIN COMMUNICATION SIGNAL

1. Power switch OFF, and then wait for 1 minutes with driver door open.

   NOTE:

   • Even after power switch OFF, power is supplied to accessories for a certain amount of time by the AUTO ACC function.

   • When Nissan Ariya vehicle is operated while on standby, power may be supplied to accessories.

2. Disconnect following connectors.

   • Power window main switch

   • Front power window motor (driver side)

   • Front power window motor (passenger side)

   • Rear power window motor RH

   • Rear power window motor LH

   • Sunroof motor assembly

   • Sunshade motor assembly

   • Passenger door mirror control module

3. Power switch ON.

4. Check signal between power window main switch harness connector, all power window motor harness connector and ground using an oscilloscope.

   (+)			(−)	Signal
   Connector		Terminal
   Power window main switch	D63	4	Ground
   Front power window motor (driver side)	D49	6
   Front power window motor (passenger side)	D1
   Rear power window motor RH	D85
   Rear power window motor LH	D105

Is the inspection result normal?

YES>>

INSPECTION END

NO-1>>

Power window main switch: GO TO 4.

NO-2>>

Front power window motor (driver side): GO TO 5.

NO-3>>

Front power window motor (passenger side): GO TO 6.

NO-4>>

Rear power window motor RH: GO TO 7.

NO-5>>

Rear power window motor LH: GO TO 8.

CHECK LIN COMMUNICATION CIRCUIT (POWER WINDOW MAIN SWITCH)

1. Power switch OFF.

2. Disconnect BCM connector.

3. Check continuity between BCM harness connector and power window main switch harness connector.

   BCM		Power window main switch		Continuity
   Connector	Terminal	Connector	Terminal
   M8	24	D63	4	Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace harness.

CHECK LIN COMMUNICATION CIRCUIT [FRONT POWER WINDOW MOTOR (DRIVER SIDE)]

1. Power switch OFF.

2. Disconnect BCM connector.

3. Check continuity between BCM harness connector and front power window motor (driver side) harness connector.

   BCM		Front power window motor (driver side)		Continuity
   Connector	Terminal	Connector	Terminal
   M8	24	D49	6	Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace harness.

CHECK LIN COMMUNICATION CIRCUIT [FRONT POWER WINDOW MOTOR (PASSENGER SIDE)]

1. Power switch OFF.

2. Disconnect BCM connector.

3. Check continuity between BCM harness connector and front power window motor (passenger side) harness connector.

   BCM		Front power window motor (passenger side)		Continuity
   Connector	Terminal	Connector	Terminal
   M8	24	D1	6	Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace harness.

CHECK LIN COMMUNICATION CIRCUIT (REAR POWER WINDOW MOTOR RH)

1. Power switch OFF.

2. Disconnect BCM connector.

3. Check continuity between BCM harness connector and rear power window motor RH harness connector.

   BCM		Rear power window motor RH		Continuity
   Connector	Terminal	Connector	Terminal
   M8	24	D85	6	Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace harness.

CHECK LIN COMMUNICATION CIRCUIT (REAR POWER WINDOW MOTOR LH)

1. Power switch OFF.

2. Disconnect BCM connector.

3. Check continuity between BCM harness connector and rear power window motor LH harness connector.

   BCM		Rear power window motor LH		Continuity
   Connector	Terminal	Connector	Terminal
   M8	24	D105	6	Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace harness.