Sunroof Motor Assembly Power Supply and Ground Circuit Check

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the sunroof motor assembly connector.
3. Turn ignition switch ON.
4. Check voltage between sunroof motor assembly connector R4 terminals 1 (W/L), 5 (W/R) and ground.
  
  Fig 1: Checking Voltage Between Sunroof Motor Assembly Connector, R4 Terminals And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Identifying Sunroof Motor Assembly Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: GO TO
CHECK GROUND CIRCUIT
Check continuity between sunroof motor assembly connector R4 terminal 7 (B) and ground.
1. 7 (B) - Ground: Continuity should exist.
OK or NG
1. OK: Sunroof motor assembly power supply and ground circuits are OK. Further inspection is necessary. Refer to "TROUBLE DIAGNOSIS CHART BY SYMPTOM ".
2. NG: Repair or replace harness.
Fig 3: Checking Continuity Between Sunroof Motor Assembly Connector R4 Terminal 7 (B) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK BCM OUTPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM connector M20 terminals 68, 69 and ground.
  1. 68 (W/L) - Ground: Battery voltage
  2. 69 (W/R) - Ground: Battery voltage
OK or NG
1. OK: GO TO 4.
2. NG: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
Fig 4: Checking Voltage Between BCM Connector M20 Terminals 68, 69 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK SUNROOF MOTOR CIRCUIT HARNESS
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM connector M20 terminal 68 (W/L), 69 (W/R) and sunroof motor assembly connector R4 terminal 1 (W/L), 5 (W/R).
  1. 68 (W/L) -1 (W/L): Continuity should exist.
  2. 69 (W/R) - 5 (W/R): Continuity should exist.
4. Check continuity between BCM connector M20 terminal 68 (W/L), 69 (W/R) and ground.
  1. 68 (W/L) - Ground: Continuity should not exist.
  2. 69 (W/R) - Ground: Continuity should not exist.
OK or NG
1. OK: Sunroof motor assembly power supply circuits are OK. Further inspection is necessary. Refer to "TROUBLE DIAGNOSIS CHART BY SYMPTOM ".
2. NG: Repair or replace harness between BCM and sunroof motor assembly.
Fig 5: Identifying BCM Connector And Sunroof Motor Assembly Connector
Courtesy of NISSAN MOTOR CO., U.S.A.