Sunroof Motor Assembly Power Supply and Ground Circuit Check

WARNING: This page is about a different car, the 2004 Nissan Quest. 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 5 (W/R) and body ground.
1. 5 (W/R) - Ground: Battery voltage
OK or NG
1. OK: GO TO 2.
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: Checking Voltage Between Sunroof Motor Assembly Connector R4 Terminal 5 (W/R) And Body Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK POWER SUPPLY CIRCUIT-2

Check voltage between sunroof motor assembly connector R4 terminal 1 and body ground.

SUNROOF MOTOR ASSEMBLY CONNECTORS VOLTAGE

Connector	Terminals (Wire color)		Condition	Voltage (V) (Approx.)
	(+)	(-)
R4	1 (W/L)	Ground	Ignition switch ON	Battery voltage
			Within 45 seconds after ignition switch is turned to OFF	Battery voltage
			When front door LH and RH are opened while retained power is operating.	0

Fig 2: Checking Voltage Between Sunroof Motor Assembly Connector R4 Terminal 1 And Body 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 (B) and ground.
  1. 7 (B) - Ground: Continuity should exist.
  OK or NG
  1. OK: Sunroof motor assembly power supply and ground circuit is OK.
  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.