Nissan Sentra Service Manual: Power supply and ground circuit
Body control system
Body control system : diagnosis procedure
Regarding wiring diagram information, refer to bcs-51, "wiring diagram".
1.Check fuses and fusible link
Check that the following fuses and fusible link are not blown.
Is the fuse blown? Yes >> replace the blown fuse or fusible link after repairing the affected circuit.
No >> go to 2.
2.Check power supply circuit
- Disconnect BCM connector M85.
- Check voltage between bcm connector m85 and ground.
Is the inspection result normal? Yes >> go to 3.
No >> repair harness or connector.
3.Check ground circuit
Check continuity between BCM connector M85 and ground.
Is the inspection result normal? Yes >> inspection end.
No >> repair harness or connector.
Moonroof motor assembly
Moonroof motor assembly : description
- Bcm supplies power.
- Cpu is integrated in moonroof motor assembly.
- Tilts up/down & slides open/close by moonroof switch operation.
- In order to close moonroof lid certainly with the signal from combination meter at the time of high speed run, the moonroof motor torque at the time of tilt-down operation is controlled.
Moonroof motor assembly : component function check
1. Check moonroof motor function
Check whether tilt up/down & slide open/close functions operate with moonroof switch normally? Is the inspection result normal? YES >> Moonroof motor assembly is OK.
NO >> Refer to RF-20, "MOONROOF MOTOR ASSEMBLY : Diagnosis Procedure".
Moonroof motor assembly : diagnosis procedure
Regarding wiring diagram information, refer to rf-13, "wiring diagram".
Moonroof motor assembly
1. Check power supply circuit
- Turn ignition switch off.
- Disconnect moonroof motor assembly connector.
- Turn ignition switch on.
- Check voltage between moonroof motor assembly connector r26 and ground.
Is the inspection result normal? YES >> GO TO 2.
NO >> GO TO 3.
2. Check ground circuit
- Turn ignition switch off.
- Check continuity between moonroof motor assembly connector R26 and ground.
Is the inspection result normal? YES >> GO TO 5.
NO >> Repair or replace the harness or connectors.
3. Check moonroof motor circuit
- Turn ignition switch off.
- Disconnect bcm.
- Check continuity between bcm connector m85 and moonroof motor assembly connector r26.
- Check continuity between BCM connector M85 and ground.
Is the inspection result normal? Yes >> go to 4.
NO >> Repair or replace the harness or connectors.
4. Check bcm power supply
- Connect bcm.
- Check voltage between BCM connector M85 and ground.
Is the inspection result normal? Yes >> check condition of harness and connectors.
No >> replace bcm. Refer to bcs-73, "removal and installation".
5. Check moonroof switch input signal
- Connect moonroof motor assembly.
- Turn ignition switch on.
- Check voltage between moonroof motor assembly connector R26 and ground.
Is the inspection result normal? Yes >> go to 8.
No >> go to 6.
6. Check moonroof switch circuit
- Turn ignition switch off.
- Disconnect moonroof motor assembly and moonroof switch.
- Check continuity between moonroof motor assembly connector r26 and moonroof switch connector r27.
- Check continuity between moonroof motor assembly connector r26 and ground.
Is the inspection result normal? YES >> GO TO 7.
NO >> Repair or replace the harness and connectors.
7. Check moonroof switch ground circuit
- Connect moonroof motor assembly.
- Check continuity between moonroof switch connector r27 and ground.
Is the inspection result normal? Yes >> refer to rf-22, "moonroof motor assembly : component inspection".
No >> repair or replace the harness or connectors.
8. Check combination meter signal
- Check signal between moonroof motor assembly connector R26 and ground with oscilloscope.
Is the inspection result normal? Yes >> replace moonroof motor assembly. Refer to rf-41, "removal and installation". After that, refer to rf-18, "additional service when replacing control unit : special repair requirement".
No >> go to 9.
9.Check combination meter circuit
- Turn ignition switch OFF.
- Disconnect combination meter.
- Check continuity between combination meter connector m24 and moonroof motor assembly connector r26.
- Check continuity between combination meter connector M24 and ground.
Is the inspection result normal? Yes >> replace combination meter. Refer to mwi-77, "removal and installation".
No >> repair or replace the harness or connectors.
Moonroof motor assembly : component inspection
Moonroof switch
1. Check moonroof switch
- Turn ignition switch off.
- Disconnect moonroof switch.
- Check continuity between moonroof switch terminals.
Is the inspection result normal? Yes >> moonroof switch is ok.
No >> replace moonroof switch (map lamp assembly). Refer to rf-50, "removal and installation".
Moonroof motor assembly : special repair requirement
1. Perform initialization procedure
Perform initialization procedure.
Refer to rf-18, "additional service when replacing control unit : special repair requirement".
>> Go to 2.
2. Check anti-pinch operation
Check anti-pinch operation.
Refer to rf-18, "additional service when replacing control unit : special repair requirement".
Is the inspection result normal? Yes >> inspection end.
No >> check fitting adjustment. Refer to rf-40, "adjustment".
Moonroof switch
Description
Transmits switch operation signal to moonroof motor assembly.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to RF-13, "Wiring Diagram".
1.Check moonroof sw ...
Other materials:
Precaution for supplemental restraint system (srs) "air bag" and "seat belt
pre-tensioner"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,
used along
with a front seat belt, helps to reduce the risk or severity of injury to the
driver and front passenger for certain
types of collision. Information necessary to service the system ...
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,
used along
with a front seat belt, helps to reduce the risk or severity of injury to the
driver and front passenger for certain
types of collision. Information necessary to service the system ...
Primary speed sensor
Exploded View
Transaxle assembly
O-ring
Primary speed sensor
: Always replace after every
disassembly.
: N m (kg-m, in-lb)
: Genuine NISSAN CVT Fluid NS-3
Removal and Installation
REMOVAL
Disconnect the primary speed sensor connector.
Remove the primary speed sensor.
...
