Sunroof Motor Assembly Power Supply and Ground Circuit Check

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER SUPPLY CIRCUIT-1
1. Turn ignition switch ON.
2. Check voltage between sunroof motor assembly connector R4 terminal 1 and ground.
  1 (W/R) - Ground: Battery voltage
OK or NG
- OK: GO TO 2.
- NG:
  - Check harness for open or short between sunroof motor assembly and BCM.
  - Check BCM. Refer to "BCM POWER SUPPLY AND GROUND CIRCUIT CHECK ".
    
    Fig 1: Measuring Voltage Between Sunroof Motor Assembly Connector R4 Terminal 1 And Ground
    Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK POWER SUPPLY CIRCUIT-2
Check voltage between sunroof motor assembly connector R4 terminal 5 and ground.

Fig 2: Power Supply Terminals And Reference Value Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Measuring Voltage Between Sunroof Motor Assembly Connector R4 Terminal 5 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: GO TO 3.
- NG:
  - Check harness for open or short between sunroof motor assembly and BCM.
  - Check front door switch LH or RH. Refer to "DOOR SWITCH CHECK ".
  - Check BCM. Refer to "BCM POWER SUPPLY AND GROUND CIRCUIT CHECK ".
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect sunroof motor assembly.
3. Check continuity between sunroof motor assembly connector R4 terminal 7 and ground.
  7 (B) - Ground: Continuity should exist.
  
  OK or NG
  - OK: Sunroof motor assembly power supply and ground circuits are OK.
  - NG: Repair or replace harness.
    
    Fig 4: Measuring Continuity Between Sunroof Motor Assembly Connector R4 Terminal 7 And Ground
    Courtesy of NISSAN MOTOR CO., U.S.A.