Main Power Window and Door Lock/Unlock Switch Power Supply Circuit Inspection System

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.

CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/unlock switch connector D7 terminal 10, D8 terminal 19 and ground.
  10 - Ground: Battery voltage
  
  19 - Ground: Battery voltage
Fig 1: Checking Voltage Between Main Power Window And Door Lock/Unlock Switch Connector Terminals And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 2.

NG: Repair or replace harness.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch.
3. Check continuity between main power window and door lock/unlock switch connector D8 terminal 17 and ground.
  17 - Ground: Continuity should exist.
Fig 2: Checking Continuity Between Main Power Window And Door Lock/Unlock Switch Connector Terminal 17 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 3.

NG: Repair or replace harness.

CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH POWER SUPPLY CIRCUIT

Disconnect BCM and main power window and door lock/unlock switch.

Check continuity between BCM connector and main power window and door lock/unlock switch connectors.

MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH POWER SUPPLY CIRCUIT

Connector	Terminal	Connector	Terminal	Continuity
A	Terminal	B	Terminal	Continuity
BCM: M20	68	Main power window and door lock/unlock switch: D7	10	Yes
	69	C	19	Yes
	69	Main power window and door lock/unlock switch: D8	19	Yes

Fig 3: Checking Continuity Between BCM Connector And Main Power Window And Door Lock/Unlock Switch Connectors

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

Check continuity between BCM and ground.

BCM AND GROUND

Connector	Terminal	Ground	Continuity
A
BCM: M20	68		No
	69		No

OK or NG

OK: GO TO 4.

NG: Repair or replace harness.

CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M20 terminals 68, 69 and ground.
  68 - Ground: Battery voltage
  
  69 - Ground: Battery voltage
Fig 4: Checking Voltage Between BCM Connector M20 Terminals 68, 69 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Check the condition of the harness and the connector.

NG: Replace BCM. Refer to "BCM ".