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Home >> Nissan-Datsun >> 2011 >> Versa L4-1.8L (MR18DE) >> Repair and Diagnosis >> Body and Frame >> Roof and Associated Components >> Sunroof / Moonroof >> Description and Operation >> System Description

System Description





TROUBLE DIAGNOSIS


System Description


OUTLINE
Electric sunroof system consists of
- Sunroof switch
- Sunroof motor assembly
- BCM (body control module)
BCM supplies power to the sunroof motor. Sunroof operation depends on sunroof switch condition.

OPERATION
Power is supplied at all times
- through 40A fusible link (letter g , located in the fuse and fusible link box)
- to BCM terminal 70, and
- through BCM terminal 69
- to sunroof motor assembly terminal 7.
When the ignition switch is in the ON or START position, power is supplied
- through 10A fuse [No. 6, located in the fuse block (J/B)]
- to BCM terminal 38, and
- through BCM terminal 68
- to sunroof motor assembly terminal 9.
Ground is supplied
- to BCM terminal 67
- through grounds M57 and M61.

TILT UP/SLIDE CLOSE OPERATION
When up/close switch is pressed, ground is supplied
- to sunroof motor assembly terminal 1
- through sunroof switch terminal 3
- through sunroof switch terminal 2
- through grounds M57 and M61.
Then the sunroof will tilt up/slide closed.

TILT DOWN/SLIDE OPEN OPERATION
When down/open switch is pressed, ground is supplied
- to sunroof motor assembly terminal 5
- through sunroof switch terminal 1
- through sunroof switch terminal 2
- through grounds M57 and M61.
Then the sunroof will tilt down/slide open.

AUTO OPERATION
The power sunroof AUTO feature makes it possible to slide open and slide closed or tilt up and tilt down the sunroof without holding the sunroof switch in the UP/CLOSE or DOWN/OPEN position.

RETAINED POWER OPERATION
When the ignition switch is turned to OFF position from ON position, power is supplied for 45 seconds
- through BCM terminal 68
- to sunroof motor assembly terminal 9.
When power is supplied, the sunroof can be operated.
The retained power operation is canceled when the front door LH or RH is opened.
RAP signal period can be changed by CONSULT-III. Work Support .

ANTI-PINCH FUNCTION
The CPU (central processing unit) of sunroof motor assembly monitors the sunroof motor operation and the sunroof position (fully-closed or other) by the signals from sunroof motor.
When sunroof motor detects an interruption during the following slide close and tilt down operation, sunroof switch controls the motor for open and the sunroof will operate until it reaches full up position (during tilt down operation) or 125 mm (4.92 in) or more in an open direction (during slide close operation).
- close operation and tilt down when ignition switch is in the ON position.
- close operation and tilt down during retained power operation.

INITIALIZATION FAILURE CONDITIONS
Initialization and teaching of system should be conducted if the following conditions exist:
- sunroof will only move in the UP/CLOSE direction, having a step by step motion
- sunroof does not have any auto operation.

INITIALIZATION PROCEDURE
If the sunroof does not open or close automatically, use the following procedure to return sunroof operation to normal.

NOTE:
If the sunroof switch is released at any time during step 3, the procedure must be started over again. Leave the ignition switch ON for at least 2 seconds after this procedure.
1. Push the ignition switch to the ON position.
2. Hold the sunroof switch in the tilt up position. Release the switch when the sunroof has reached the full tilt up position.
3. Within 5 seconds of releasing the switch in step 2, hold the sunroof switch in the tilt up position again. The sunroof will move from the open position and back to the close position. Release the switch only when the sunroof has reached the full closed position.

RE-TEACHING CONDITIONS
Re-teaching of system should be conducted if any of the following conditions exist:
- the sunroof is manually operated using the sunroof wrench with the battery discharged or disconnected.
- the sunroof is manually operated using the sunroof wrench with the key switch in the OFF position and retained power timed out (after approximately 45 seconds or with a front door open).
- the sunroof motor assembly is replaced with a new one.
- the sunroof motor is removed from the sunroof assembly and operated before it is reinstalled.
- the sunroof motor is removed from the sunroof assembly and the glass panel position is changed.

RE-TEACHING PROCEDURE
1. Using the UP/CLOSE switch, move the sunroof toward the tilt position until it stops.
2. Release the UP/CLOSE switch.
3. Press the UP/CLOSE switch again and continuously hold. The sunroof will begin to move in about 10 seconds.
4. Continue to hold the UP/CLOSE switch while the sunroof moves in a jogging motion to the full tilt position.
When the sunroof reaches the full tilt position, it will back up a few millimeters and stop.
5. Release the UP/CLOSE switch.
6. Within 5 seconds of releasing the UP/CLOSE switch, press and hold the UP/CLOSE switch again. The sunroof will move to the full open position and back to the closed position.

NOTE:
If the UP/CLOSE switch is released anytime during this teaching process, all learned profile data will be discarded and the procedure will have to be started over.
7. Release the UP/CLOSE switch. Do not disconnect power for at least two seconds. The sunroof is now retaught.
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