2008 NISSAN LATIO service

AV-56
< SERVICE INFORMATION >
TELEPHONE
Removal
1. For hatchback, remove luggage side lower finish (RH). Refer to EI-51, "Removal and Installation".
• Disconnect Bluetooth antenna harness clip.
2. For sedan, remove the trunk room side finisher (RH). Refer to EI-53, "
Removal and Installation".
• Disconnect the Bluetooth antenna harness connector.
3. Disconnect the Bluetooth control unit harness connector.
4. Remove the Bluetooth control unit upper and lower bracket bolts.
5. Unhook the Bluetooth control unit upper and lower brackets and remove Bluetooth control unit.
6. Remove Bluetooth control unit bracket screws and remove the upper and lower brackets from unit.
Installation
Installation is in the reverse order of removal.
BLUETOOTH ANTENNA
Hatchback
1. Bluetooth control unit bracket 2. Bluetooth control unit 3. Bluetooth antenna feeder connector
A. Bluetooth control unit bolts B. Bluetooth control unit connector⇐Front
LKIA0763E
1. Bluetooth antenna bracket 2. Bluetooth antenna A. Bluetooth antenna bracket bolts
B. Bluetooth antenna screws C. Bluetooth antenna feeder harness
clips

TELEPHONE
AV-57
< SERVICE INFORMATION >
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Sedan
Removal
1. For hatchback, remove luggage side lower finisher (RH). Refer to EI-51, "Removal and Installation".
2. For sedan, fold the rear seat back down, remove the seat back finisher (RH). Refer to EI-53, "
Removal
and Installation".
3. Disconnect the Bluetooth antenna feeder harness clips.
4. Disconnect the Bluetooth antenna feeder harness connector.
5. Remove the Bluetooth antenna bracket bolt(s) and remove antenna.
6. Remove the Bluetooth antenna screws and remove bracket.
Installation
Installation is in the reverse order of removal.
BLUETOOTH MICROPHONE
Removal
1. Remove over-head console assembly, roof finisher. Refer to EI-45.
2. Remove the Bluetooth microphone.
Installation
Installation is in the reverse order of removal.
LKIA0937E
1. Bluetooth antenna bracket 2. Bluetooth antenna A. Bluetooth antenna bracket bolts
B. Bluetooth antenna screws C. Bluetooth antenna feeder harness
clip⇒Front

BCS-1
ELECTRICAL
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SECTION BCS
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CONTENTS
BODY CONTROL SYSTEM
SERVICE INFORMATION ............................2
PRECAUTIONS ...................................................2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
2
BCM (BODY CONTROL MODULE) ....................3
System Description ...................................................3
CAN Communication System Description .................7
Schematic .................................................................8
BCM Terminal Arrangement ....................................10
Terminal and Reference Value for BCM ..................11
BCM Power Supply and Ground Circuit Inspection
....
15
CONSULT-III Function (BCM) .................................16
CAN Communication Inspection Using CON-
SULT-III (Self-Diagnosis) .........................................
17
Configuration ...........................................................17
Removal and Installation of BCM ............................18

BCS-2
< SERVICE INFORMATION >
PRECAUTIONS
SERVICE INFORMATION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001704583
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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.

BCM (BODY CONTROL MODULE)
BCS-3
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BCM (BODY CONTROL MODULE)
System DescriptionINFOID:0000000001704584
BCM (body control module) controls the operation of various electrical units installed on the vehicle.
BCM FUNCTION
BCM has a combination switch reading function for reading the operation of combination switches (light, wiper,
washer, turn signal) in addition to the function for controlling the operation of various electrical components.
Also, it functions as an interface that receives signals from the front air control, and sends signals to ECM
using CAN communication.
COMBINATION SWITCH READING FUNCTION
1. Description
• BCM reads combination switch (light, wiper) status, and controls various electrical components accord-
ing to the results.
• BCM reads information of a maximum of 20 switches by combining five output terminals (OUTPUT 1-5)
and five input terminals (INPUT 1-5).
2. Operation description
• BCM activates transistors of output terminals (OUTPUT 1-5) periodically and allows current to flow in
turn.
• If any (1 or more) of the switches are turned ON, circuit of output terminals (OUTPUT 1-5) and input ter-
minals (INPUT 1-5) becomes active.
• At this time, transistors of output terminals (OUTPUT 1-5) are activated to allow current to flow. When
voltage of input terminals (INPUT 1-5) corresponding to that switch changes, interface in BCM detects
voltage change and BCM determines that switch is ON.
3. BCM - Operation table of combination switch
• BCM reads operation status of combination switch by the combination shown in the following table.
SKIB7592E

BCS-4
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
NOTE:
Headlamp has a dual system switch.
4. Example operation: (When lighting switch 1st position is turned ON)
• When lighting switch 1st position is turned ON, contact in combination switch turns ON. At this time if
OUTPUT 4 transistor is activated, BCM detects that voltage changes in INPUT 5.
• When OUTPUT 4 transistor is ON, BCM detects that voltage changes in INPUT 5, and judges lighting
switch 1st position is ON. Then BCM sends tail lamp ON signal to IPDM E/R using CAN communication.
• When OUTPUT 4 transistor is activated again, BCM detects that voltage changes in INPUT 5 and rec-
ognizes that lighting switch 1st position is continuously ON.
NOTE:
Each OUTPUT terminal transistor is activated at 10ms intervals. Therefore, after a switch is turned ON,
electrical loads are activated with a time delay. But this time delay is so short that it cannot be noticed.
5. Operation mode
• Combination switch reading function has operation modes as follows:
SKIB7614E
SKIB7615E

BCM (BODY CONTROL MODULE)
BCS-5
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Normal status
• When BCM is not in sleep status, OUTPUT terminals (1-5) each turn ON-OFF every 10ms.
Sleep status
• When BCM is in sleep mode, transistors of OUTPUT 1 and 5 stop the output, and BCM enters low-cur-
rent-consumption mode. OUTPUTS (2, 3, and 4) turn ON-OFF at 60ms intervals, and receives lighting
switch input only.
CAN COMMUNICATION CONTROL
CAN communication allows a high rate of information through the two communication lines (CAN-L, CAN-H)
connecting the various control units in the system. Each control unit transmits/receives data, but selectively
reads required data only.
BCM STATUS CONTROL
BCM changes its status depending on the operation status in order to save power consumption.
1. CAN communication status
• With ignition switch ON, CAN communicates with other control units normally.
• Control by BCM is being operated properly.
• When ignition switch is OFF, switching to sleep mode is possible.
• Even when ignition switch is OFF, if CAN communication with IPDM E/R and combination meter is
active, CAN communication status is active.
2. Sleep transient status
• This status shuts down CAN communication when ignition switch is turned OFF.
• It transmits sleep request signal to IPDM E/R and combination meter.
• Two seconds after CAN communication of all control units stops, CAN communication switches to inac-
tive status.
3. CAN communication inactive status
• With ignition switch OFF, CAN communication is not active.
• With ignition switch OFF, control performed only by BCM is active.
• Three seconds after CAN communication of all control units stops, CAN communication switches to
inactive status.
4. Sleep status
• BCM is activated with low current consumption mode.
• CAN communication is not active.
PKIB6124E

BCS-6
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
• When CAN communication operation is detected, it switches to CAN communication status.
• When a state of the following switches changes, it switches to CAN communication state:
- Ignition switch
- Key switch (without Intelligent Key)
- Key switch and ignition knob switch (with Intelligent Key)
- Hazard switch
- Door lock/unlock switch
- Front door switch (LH, RH)
- Rear door switch (LH, RH)
- Back door lock assembly (Hatchback)
- Trunk key cylinder switch (Sedan)
- Trunk lamp switch and trunk release solenoid (Sedan)
- Combination switch (passing, lighting switch 1st position, front fog lamp)
- Keyfob (lock/unlock signal)
- Front door key cylinder switch LH
• When control performed only by BCM is required by switch, it shifts to CAN communication inactive
mode.
• Status of combination switch reading function is changed.
SYSTEMS CONTROLLED BY BCM DIRECTLY
• Power door lock system. Refer to BL-22 .
• Remote keyless entry system. Refer to BL-51
.
• Power window system. Refer to GW-18
. NOTE
• Sunroof system. Refer to RF-10. NOTE
• Room lamp timer. Refer to LT- 8 9 .
• Rear wiper and washer system. Refer to WW-24
.
NOTE:
Power supply only. No system control.
SYSTEMS CONTROLLED BY BCM AND IPDM E/R
• Panic system. Refer to BL-51 .
• Vehicle security (theft warning) system. Refer to BL-187
.
• NVIS(NATS) system. Refer to BL-210
.
• Headlamp, tail lamp and battery saver control systems. Refer to LT- 7 2
, LT- 4 or LT- 2 5 .
• Front fog lamp. Refer to LT- 3 9
.
• Front wiper and washer system. Refer to WW-3
.
• Rear window defogger system. Refer to GW-49
.
SYSTEMS CONTROLLED BY BCM AND COMBINATION METER
• Warning chime. Refer to DI-41 .
• Turn signal and hazard warning lamps. Refer to LT- 4 8
.
SYSTEMS CONTROLLED BY BCM AND INTELLIGENT KEY UNIT
• Intelligent Key system. Refer to BL-74 .
MAJOR COMPONENTS AND CONTROL SYSTEM
System Input Output
Remote keyless entry systemRemote keyless entry receiver
(keyfob)• All door locking actuators
• Turn signal lamp (LH, RH)
• Combination meter (turn signal lamp)
Intelligent Key system Intelligent Key unit• All door locking actuators
• Turn signal lamp (LH, RH)
• Combination meter (turn signal lamp)
Power door lock systemFront power door lock/unlock
switch (LH, RH)All door locking actuators
Power supply (IGN/RAP) to power
windowIgnition retained power supply Power supply to power window and sunroof system
Power supply (BAT) to power window Battery power supply Power supply to power window and sunroof system