2007 NISSAN LATIO relay

LT-108
ILLUMINATION
Revision: June 20062007 Versa
ILLUMINATIONPFP:27545
System DescriptionEKS00HZU
The control of the illumination lamps operation is dependent upon the position of the lighting switch. When the
lighting switch is placed in the 1ST or 2ND position, the BCM (body control module) receives input signal
requesting the illumination lamps to illuminate. This input signal is communicated to IPDM E/R (intelligent
power distribution module engine room) across CAN communication lines. CPU (central processing unit)
located in the IPDM E/R controls the tail lamp relay coil. This relay, when energized, directs power to the illu-
mination lamps, which then illuminate.
Power is supplied at all times

to ignition relay, located in IPDM E/R,

to tail lamp relay, located in IPDM E/R,

through 15A fuse (No. 52, located in IPDM E/R) and

through 20A fuse (No. 53, located in IPDM E/R)

to CPU located in IPDM E/R,

through 40A fusible link (letter g , located in fuse and fusible link box)

to BCM terminal 70, and

through 10A fuse [No. 8, located in fuse block (J/B)]

to BCM terminal 57.
With the ignition switch in the ON or START position, power is supplied

to ignition relay, located in IPDM E/R, and

through 10A fuse [No. 6, located in fuse block (J/B)]

to BCM terminal 38.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 20, located in fuse block (J/B)]

to BCM terminal 11.
Ground is supplied

to BCM terminal 67

through grounds M57 and M61, and

to IPDM E/R terminals 39 and 59

through grounds E15 and E24.
ILLUMINATION OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST or 2ND position, BCM receives input signal requesting the illumination
lamps to illuminate. This input signal is communicated to IPDM E/R across CAN communication lines. CPU
located in the IPDM E/R controls the tail lamp relay coil, which, when energized, directs power

through 10A fuse (No. 37, located in IPDM E/R)

through IPDM E/R terminal 29

to microphone terminal 3 (with Bluetooth)

to illumination control switch terminal 1

to glove box lamp terminal 1 (with glovebox lamp)

to audio unit terminal 9

to front air control terminal 5

to A/T device terminal 3 (without M/T)

to hazard switch terminal 3

to combination meter terminal 12

to door mirror remote control switch terminal 16, and

to main power window and door lock/unlock switch terminal 4.
Ground is supplied

to microphone terminal 2 (with Bluetooth)

to glove box lamp terminal 2 (with glove box lamp), and

MTC-16
REFRIGERATION SYSTEM
Revision: June 20062007 Versa
REFRIGERATION SYSTEMPFP:KA990
Refrigerant CycleEJS00576
REFRIGERANT FLOW
The refrigerant flows in the standard pattern, that is, through the compressor, the condenser with liquid tank,
through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator is
controlled by an externally equalized expansion valve, located inside the evaporator case.
FREEZE PROTECTION
Under usual operating conditions, when the A/C is switched ON, the compressor runs continuously, and the
evaporator pressure, and temperature is controlled by the compressor to prevent freeze up.
Refrigerant System ProtectionEJS00577
REFRIGERANT PRESSURE SENSOR
The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure sen-
sor, located on the condenser. If the system pressure rises above, or falls below the specifications, the refrig-
erant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM.
ECM makes the A/C relay go OFF and stops the compressor when pressure on the high-pressure side
detected by refrigerant pressure sensor is over about 2,746 kPa (27.46 bar, 28.0 kg/cm
2 , 398 psi), or below
about 134 kPa (1.34 bar, 1.4 kg/cm
2 , 20 psi).
PRESSURE RELIEF VALVE
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
When the pressure of refrigerant in the system increases to an unusual level [more than 3.8 MPa (38 bar,
38.76 kg/cm
2 , 551 psi)], the release port on the pressure relief valve automatically opens and releases refrig-
erant into the atmosphere.
RJIA0849E

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POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
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Revision: June 20062007 Versa PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
POWER SUPPLY ROUTING CIRCUIT ...................... 4
Schematic ................................................................ 4
Wiring Diagram — POWER — ................................. 6
BATTERY POWER SUPPLY — IGNITION
SWITCH IN ANY POSITION ................................. 6
ACCESSORY POWER SUPPLY — IGNITION
SWITCH IN ACC AND/OR ON ............................11
IGNITION POWER SUPPLY — IGNITION
SWITCH IN ON ................................................... 12
IGNITION POWER SUPPLY — IGNITION
SWITCH IN ON AND/OR START. ....................... 13
IGNITION POWER SUPPLY — IGNITION
SWITCH IN START ............................................. 15
Fuse ....................................................................... 16
Fusible Link ............................................................ 16
Circuit Breaker (Built Into BCM) ............................. 16
Circuit Breaker ....................................................... 16
IPDM E/R (INTELLIGENT POWER DISTRIBUTION
MODULE ENGINE ROOM) ...................................... 17
System Description ................................................ 17
SYSTEMS CONTROLLED BY IPDM E/R ........... 17
CAN COMMUNICATION LINE CONTROL ......... 17
IPDM E/R STATUS CONTROL ........................... 18
CAN Communication System Description .............. 18
Function of Detecting Ignition Relay Malfunction ... 18
CONSULT-II Function (IPDM E/R) ......................... 19
CONSULT-II START PROCEDURE .................... 19
SELF-DIAGNOSTIC RESULTS .......................... 19
DATA MONITOR ................................................. 20
CAN DIAG SUPPORT MNTR ............................. 20
ACTIVE TEST ..................................................... 20
Auto Active Test ..................................................... 21
DESCRIPTION .................................................... 21
OPERATION PROCEDURE ............................... 21
INSPECTION IN AUTO ACTIVE TEST MODE ... 22
IPDM E/R Terminal Arrangement ........................... 24Terminals and Reference Values for IPDM E/R ...... 25
IPDM E/R Power/Ground Circuit Inspection ........... 28
Inspection with CONSULT-II (Self-Diagnosis) ........ 29
Removal and Installation of IPDM E/R ................... 29
REMOVAL ........................................................... 29
INSTALLATION ................................................... 29
GROUND CIRCUIT ................................................... 30
Ground Distribution ................................................. 30
MAIN HARNESS ................................................. 30
ENGINE ROOM HARNESS ................................ 33
ENGINE CONTROL HARNESS .......................... 35
BODY HARNESS ................................................ 36
BODY NO. 2 HARNESS ..................................... 37
BACK DOOR HARNESS .................................... 38
HARNESS ................................................................. 39
Harness Layout ...................................................... 39
HOW TO READ HARNESS LAYOUT ................. 39
OUTLINE ............................................................. 40
MAIN HARNESS ................................................. 41
ENGINE ROOM HARNESS (LH VIEW) .............. 43
ENGINE ROOM HARNESS (RH VIEW) ............. 45
ENGINE CONTROL HARNESS .......................... 47
BODY HARNESS ................................................ 49
BODY NO. 2 HARNESS ..................................... 51
ROOM LAMP HARNESS .................................... 53
FRONT DOOR LH HARNESS ............................ 55
FRONT DOOR RH HARNESS ............................ 56
REAR DOOR LH HARNESS ............................... 57
REAR DOOR RH HARNESS .............................. 58
BACK DOOR HARNESS .................................... 59
Wiring Diagram Codes (Cell Codes) ...................... 61
ELECTRICAL UNITS LOCATION ............................ 64
Electrical Units Location ......................................... 64
ENGINE COMPARTMENT .................................. 64
PASSENGER COMPARTMENT ......................... 65
LUGGAGE COMPARTMENT .............................. 67
HARNESS CONNECTOR ......................................... 68
Description .............................................................. 68
HARNESS CONNECTOR (TAB-LOCKING

PG-2Revision: June 20062007 Versa TYPE) .................................................................. 68
HARNESS CONNECTOR (SLIDE-LOCKING
TYPE) .................................................................. 69
HARNESS CONNECTOR (LEVER LOCKING
TYPE) .................................................................. 70
HARNESS CONNECTOR (DIRECT-CONNECT
SRS COMPONENT TYPE) ................................. 71
ELECTRICAL UNITS ................................................ 72
Terminal Arrangement ............................................ 72STANDARDIZED RELAY ..........................................73
Description ..............................................................73
NORMAL OPEN, NORMAL CLOSED AND
MIXED TYPE RELAYS ........................................73
TYPE OF STANDARDIZED RELAYS ..................73
SUPER MULTIPLE JUNCTION (SMJ) ......................75
Terminal Arrangement .............................................75
FUSE BLOCK-JUNCTION BOX (J/B) ......................76
Terminal Arrangement .............................................76
FUSE AND FUSIBLE LINK BOX ..............................77
Terminal Arrangement .............................................77

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PFP:284B7
System DescriptionEKS00JLJ

IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box and fuse block
which were originally placed in engine compartment. It controls integrated relays via IPDM E/R control cir-
cuits.

IPDM E/R-integrated control circuits perform ON-OFF operation of relays, CAN communication control, oil
pressure switch signal reception, etc.

It controls operation of each electrical component via ECM, BCM and CAN communication lines.
CAUTION:
None of the IPDM E/R integrated relays can be removed.
SYSTEMS CONTROLLED BY IPDM E/R
1. Lamp control
Using CAN communication lines, it receives signals from the BCM and controls the following lamps:

Headlamps (High, Low)

Parking lamps

Tail and license plate lamps

Front fog lamps
2. Wiper control
Using CAN communication lines, it receives signals from the BCM and controls the front wipers.
3. Rear window defogger relay control
Using CAN communication lines, it receives signals from the BCM and controls the rear window defogger
relay.
4. A/C compressor control
Using CAN communication lines, it receives signals from the ECM and controls the A/C compressor
(magnet clutch).
5. Starter control
Using CAN communication lines, it receives signals from the BCM and controls the starter relay.
6. Cooling fan control
Using CAN communication lines, it receives signals from the ECM and controls the cooling fan relays.
7. Horn control
Using CAN communication lines, it receives signals from the BCM and controls the horn relay.
8. Daytime light system control (Canada only)
Using CAN communication lines, it receives signals from the BCM and controls the daytime light relay.
CAN COMMUNICATION LINE CONTROL
With CAN communication, by connecting each control unit using two communication lines (CAN L-line, CAN
H-line), it is possible to transmit a maximum amount of information with minimum wiring. Each control unit can
transmit and receive data, and reads necessary information only.
1. Fail-safe control

When CAN communication with other control units is impossible, IPDM E/R performs fail-safe control.
After CAN communication returns to normal operation, it also returns to normal control.

Operation of control parts by IPDM E/R during fail-safe mode is as follows:
Controlled system Fail-safe mode
Headlamp

With the ignition switch ON, headlamp low relay is ON, headlamp high relays are OFF,
and daytime light system (Canada only) is OFF.

With the ignition switch OFF, the headlamp relays are OFF.
Tail, license plate and parking lamps

With the ignition switch ON, the tail lamp relay is ON.

With the ignition switch OFF, the tail lamp relay is OFF.
Cooling fan

With the ignition switch ON, cooling fan relay-1, relay-2, and relay-3 are ON.

With the ignition switch OFF, all cooling fan relays are OFF.
Front wiperUntil the ignition switch is turned off, the front wiper relays remain in the same status they
were in just before fail−safe control was initiated.

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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: June 20062007 Versa
IPDM E/R STATUS CONTROL
In order to save power, IPDM E/R switches status by itself based on each operating condition.
1. CAN communication status

CAN communication is normally performed with other control units.

Individual unit control by IPDM E/R is normally performed.

When sleep request signal is received from BCM, mode is switched to sleep waiting status.
2. Sleep waiting status

Process to stop CAN communication is activated.

All systems controlled by IPDM E/R are stopped. When 1 second has elapsed after CAN communica-
tion with other control units is stopped, mode switches to sleep status.
3. Sleep status

IPDM E/R operates in low current-consumption mode.

CAN communication is stopped.

When a change in CAN communication signal is detected, mode switches to CAN communication sta-
tus.

When a change in ignition switch signal is detected, mode switches to CAN communication status.
CAN Communication System DescriptionEKS00JLK
Refer to LAN-4, "SYSTEM DESCRIPTION" .
Function of Detecting Ignition Relay MalfunctionEKS00JLL

When the integrated ignition relay is stuck in a "closed contact" position and cannot be turned OFF, IPDM
E/R turns ON tail and parking lamps for 10 minutes to indicate IPDM E/R malfunction.

When the state of the integrated ignition relay does not agree with the state of the ignition switch signal
received via CAN communication, the IPDM E/R activates the tail lamp relay.
NOTE:
When the ignition switch is turned ON, the tail lamps are OFF.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay is OFF
Front fog lamps Front fog lamp relay OFFControlled system Fail-safe mode
Ignition switch signal Ignition relay status Tail lamp relay
ON ON —
OFF OFF —
ON OFF —
OFF ON ON (10 minutes)

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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: June 20062007 Versa
DATA MONITOR
All Signals, Main Signals, Selection From Menu
*1 Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is in ACC position, display may not be cor-
rect.
*2 This item is displayed, but does not function.
CAN DIAG SUPPORT MNTR
Refer to LAN-4, "SYSTEM DESCRIPTION" .
ACTIVE TEST
Display Item List
Item nameCONSULT-II
screen display Display or unitMonitor item selection
Description
ALL
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU
Motor fan requestMOTOR FAN
REQ1/2/3/4 X X X Signal status input from ECM
Compressor
requestAC COMP REQ ON/OFF X X X Signal status input from ECM
Parking, license,
and tail lamp
requestTAIL & CLR REQ ON/OFF X X X Signal status input from BCM
Headlamp low
beam requestHL LO REQ ON/OFF X X X Signal status input from BCM
Headlamp high
beam requestHL HI REQ ON/OFF X X X Signal status input from BCM
Front fog request FR FOG REQ ON/OFF X X X Signal status input from BCM
FR wiper request FR WIP REQ STOP/1LO/LO/HI X X X Signal status input from BCM
Wiper auto stopWIP AUTO
STOPACT P/STOP P X X X Output status of IPDM E/R
Wiper protection WIP PROT OFF/LS/HS/Block X X X Control status of IPDM E/R
Starter request ST RLY REQ ON/OFF X X Status of input signal (*1)
Ignition relay
statusIGN RLY ON/OFF X X XIgnition relay status monitored
with IPDM E/R
Rear defogger
requestRR DEF REQ ON/OFF X X X Signal status input from BCM
Oil pressure
switchOIL P SW OPEN/CLOSE X XSignal status input from IPDM
E/R
Hood switch HOOD SW (*2) OFF X XSignal status input from IPDM
E/R
Theft warning
horn requestTHFT HRN REQ ON/OFF X X Signal status input from BCM
Horn chirp HORN CHIRP ON/OFF X X Output status of IPDM E/R
Daytime light
requestDTRL REQ ON/OFF X X Signal status input from BCM
Test name CONSULT-II screen display Description
Head, tail, fog lamp output EXTERNAL LAMPWith a certain ON-OFF operation (OFF, TAIL, LO, HI, FOG), the front
fog lamp, headlamp low, headlamp high RH, headlamp high LH, and
tail lamp relays can be operated.
Rear defogger output REAR DEFOGGERWith a certain ON-OFF operation, the rear defogger relay can be oper-
ated.
Front wiper (HI, LO) output FRONT WIPERWith a certain operation (OFF, HI ON, LO ON), the front wiper relays
(Lo, Hi) can be operated.

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
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Auto Active TestEKS00JLN
DESCRIPTION

In auto active test mode, operation inspection can be performed when IPDM E/R sends a drive signal to
the following systems:
–Rear window defogger
–Front wipers
–Tail, license and parking lamps
–Daytime lamp system (Canada only)
–Front fog lamps
–Headlamps (High, Low)
–A/C compressor (magnet clutch)
–Cooling fan
OPERATION PROCEDURE
1. Close hood and front door RH, and lift wiper arms away from windshield (to prevent glass damage by
wiper operation).
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield beforehand.
2. Turn ignition switch OFF.
3. Turn ignition switch ON and, within 20 seconds, press front door switch LH 20 times. Then turn ignition
switch OFF.
4. Turn ignition switch ON within 10 seconds after ignition switch OFF.
5. When auto active test mode is actuated, horn chirps once.
6. After a series of operations is repeated three times, auto active test is completed.
NOTE:
When auto active test mode has to be cancelled halfway, turn ignition switch OFF.
CAUTION:
Be sure to perform BL-40, "
Door Switch Check" when the auto active test cannot be performed.
Cooling fan output MOTOR FANWith a certain operation (1, 2, 3, 4), the cooling fan relays can be oper-
ated.
Horn output HORN With a certain ON-OFF operation, the horn relay can be operated.Test name CONSULT-II screen display Description