Power Window Switch Power Supply Circuit Check

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

POWER SUPPLY CIRCUIT CHECK
1. Turn ignition switch ON.
2. Check voltage between power window main switch connector D7 terminal 1, 10 and ground.
  1. 1 (W) - Ground: Battery voltage
  2. 10 (W) - Ground: Battery voltage
  Fig 1: Checking Power Window Main Switch Power Supply Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between power window sub-switch connector D43 terminal 10 and ground.
  1. 10 (R)-Ground: Battery voltage
  Fig 2: Checking Power Window Sub-Switch Power Supply Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: Power window switch power supply is OK.

NG: GO TO 2.
CHECK POWER WINDOW REGULATOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM, power window main switch and power window sub-switch connector.
3. Check continuity between BCM connector M1 terminal 28, 29, power window main switch connector D7 terminal 1, 10, and between BCM connector M1 terminal 28, 29 and ground.
  1. BCM - Power window main switch
  2. 28 (W) - 1 (W): Continuity should exist.
  3. 29 (Y/B) - 10 (P): Continuity should exist.
  4. BCM - Ground
  5. 28 (W) - Ground: Continuity should not exist.
  6. 29 (Y/B) - Ground: Continuity should not exist.
  Fig 3: Checking Continuity Between BCM Connector And Power Window Main Switch Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between BCM connector M1 terminal 28, power window sub-switch connector D43 terminal 10, and between BCM connector M1 terminal 28 and ground.
5. BCM - Power window sub-switch
  1. 28 (W) - 10 (R): Continuity should exist.
  2. BCM - Ground
  3. 28 (W) - Ground: Continuity should not exist.
OK or NG

OK: GO TO 3

NG: Repair or replace harness.

Fig 4: Checking Continuity Between BCM Connector And Power Window Sub-Switch Switch Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK BCM OUTPUT SIGNAL
1. Connect BCM connector.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M1 terminal 28, 29 and ground.
  1. 28 (W) - Ground: Battery voltage
  2. 29 (Y/B) - Ground: Battery voltage
OK or NG

OK: INSPECTION END

NG: Replace BCM.

Fig 5: Checking BCM Output Signal
Courtesy of NISSAN MOTOR CO., U.S.A.