NISSAN LATIO 2009 Service Repair Manual

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Removal
1. For hatchback, remove luggage side lower finish (RH). Refer to EI-53, " Removal and Installation " .
• Disconnect Bluetooth antenna harness clip.
2. For sedan, remove the trunk room side finisher (RH). Refer to EI-55, " 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 lowe r 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

Removal and Installation " .
2. For sedan, fold the rear seat back down, re move the seat back finisher (RH). Refer to EI-55, " Removal
and Installation " .
3. Disconnect the Bluetooth antenna feeder harness clips.
4. Disconnect the Bluetooth ant enna 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-47 .
2. Remove the Bluetooth microphone.
Installation
Installation is in the reverse order of removal.

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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 (B CM) .................................16
CAN Communication Inspection Using CON-
SULT-III (Self-Diagnosis) ..................................... ....
17
Configuration ....................................................... ....18
Removal and Installation of BCM ........................ ....18

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BCM (BODY CONTROL MODULE)
System Description INFOID:0000000004306833
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 c ontrolling the operation of various electrical components.
Also, it functions as an interface that receives signal s 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.

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Normal status
• When BCM is not in sleep status, OUTPUT te rminals (1-5) each turn ON-OFF every 10ms.
Sleep status
• When BCM is in sleep mode, transistors of OUTP UT 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 stat us 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 co mmunication 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 cont rol units stops, CAN communication switches to
inactive status.
4. Sleep status • BCM is activated with low current consumption mode.
• CAN communication is not active.

System Description " .
• Remote keyless entry system. Refer to BL-58, " System Description " .
• Power window system (with power windows). Refer to GW-19, " System Description " .
NOTE
• Sunroof system (with sunroof). Refer to RF-11, " System Description " .
NOTE
• Room lamp timer. Refer to LT-91, " System Description " .
• Rear wiper and washer system (Hatchback). Refer to WW-25, " System Description " .
NOTE:
Power supply only. No system control.
SYSTEMS CONTROLLED BY BCM AND IPDM E/R
• Panic system. Refer to BL-58, " System Description " .
• Vehicle security (theft warning) system. Refer to BL-219, " System Description " .
• NVIS(NATS) system. Refer to BL-248, " System Description " .
• Headlamp, tail lamp and battery saver control systems. Refer to LT-73, " System Description " ,
LT-4, " System
Description " or
LT-25, " System Description " .
• Front fog lamp (with front fog lamps). Refer to LT-39, " System Description " .
• Front wiper and washer system. Refer to WW-3, " System Description " .
• Rear window defogger system. Refer to GW-51, " System Description " .
SYSTEMS CONTROLLED BY BCM AND COMBINATION METER
• Warning chime. Refer to DI-42, " System Description " .
• Turn signal and hazard warning lamps. Refer to LT-48, " System Description " .
SYSTEMS CONTROLLED BY BCM AND INTELLIGENT KEY UNIT (WITH INTELLIGENT KEY)
• Intelligent Key system. Refer to BL-88, " System Description " .
MAJOR COMPONENTS AND CONTROL SYSTEM
System Input Output
Remote keyless entry system (with
power door locks) Remote keyless entry receiver
(keyfob) • All door locking actuators
• Turn signal lamp (LH, RH)
• Combination meter (turn signal lamp)
Intelligent Key system (with Intelligent
Key) Intelligent Key unit• All door locking actuators
• Turn signal lamp (LH, RH)
• Combination meter (turn signal lamp)
Power door lock system (with power
door locks) Front power door lock/unlock
switch (LH, RH) All door locking actuators
Power supply (IGN/RAP) to power
window (with power windows) Ignition retained power supply Power supply to power window and sunroof system
Power supply (BAT) to power window
(with power windows) Battery power supply Power supply to power window and sunroof system

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CAN Communication System Description INFOID:0000000004306834
Refer to LAN-8, " System Description " .
Panic alarm
• Key switch
• Keyfob IPDM E/R
Vehicle security system • All door switches
• Keyfob
• Door lock/unlock switch
• Trunk key cylinder switch (Se-
dan)
• Front door key cylinder switch LH • IPDM/ER
• Security indicator lamp
Battery saver control • Ignition switch
• Combination switch IPDM E/R
Headlamp Combination switch IPDM E/R
Tail lamp Combination switch IPDM E/R
Front fog lamp (with front fog lamps) Combination switch IPDM E/R
Turn signal lamp Combination switch • Turn signal lamp
• Combination meter
Hazard lamp Hazard switch • Turn signal lamp
• Combination meter
Room lamp timer • Key switch
• Keyfob
• Main power window and door lock/unlock switch
• Front door switch LH
• All door switch Interior room lamp
Back door switch signal (Hatchback) Back door lock assembly Luggage room lamp
Back door lock signal (Hatchback) Back door lock assembly Back door opener
Trunk lamp switch signal (Sedan) Trunk lamp switch and trunk re-
lease solenoid Luggage room lamp
Trunk lid opener signal (Sedan) Trunk lamp switch and trunk re-
lease solenoid Trunk lid opener
Key warning chime • Key switch
• Front door switch LH Combination meter (warning buzzer)
Light warning chime • Combination switch
• Key switch
• Front door switch LH Combination meter (warning buzzer)
Seat belt warning chime • Seat belt buckle switch LH
• Ignition switch Combination meter (warning buzzer)
Front wiper and washer system • Combination switch
• Ignition switch IPDM E/R
Rear window defogger Rear window defogger switch IPDM E/R
Rear wiper and washer system
(Hatchback) • Combination switch
• Ignition switch Rear wiper motor
A/C switch signal Front air control ECM
Blower fan switch signal Front air control ECM
A/C indicator signal Front air control A/C indicator
Low tire pressure warning system Remote keyless entry receiver Combination meter System Input Output

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