Engine cooling system NISSAN TIIDA 2011 Service Manual Online

A/C UNIT ASSEMBLYMTC-59
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A/C UNIT ASSEMBLY
Removal and InstallationINFOID:0000000005930860
REMOVAL
1. Use a recovery/recycling equipment (f or HFC-134a) to discharge refrigerant.
2. Drain coolant from cooling system. Refer to CO-36, "
Changing Engine Coolant".
3. Remove cowl top cover. Refer to EI-24, "
Removal and Installation".
4. Remove upper clip and position the lower dash insulator aside.
5. Remove bolt (A), and then disconnect low-pressure flexible hose (1) and high-pressure pipe (2) from evaporator.
CAUTION:
Cap or wrap the joint of the pi pe with suitable material such
as vinyl tape to avoid the entry of air.
6. Remove clamps (A), and then disconnect heater hoses (1) from heater core.
7. Remove console box assembly. Refer to IP-11, "
Component Parts".
A. A/C unit assembly boltsB. Steering member boltsC. Steering column nuts
SJIA0648E
SJIA0644E
SJIA0645E
Revision: May 2010 2011 Versa

MTC-94
< SERVICE INFORMATION >
REFRIGERANT LINES
2. When testing, circle each fitting completely with probe.
3. Move probe along component approximately 25 to 50 mm (1 to2 in) per second.
CHECKING PROCEDURE
To prevent inaccurate or false readings, make sure there is no refrigerant vapor, shop chemicals, or cigarette
smoke in the vicinity of the vehicle. Perform the leak test in calm area (low air/wind movement) so that the
leaking refrigerant is not dispersed.
1. Turn engine OFF.
2. Connect a suitable A/C manifold gauge set to the A/C service ports.
3. Check if the A/C refrigerant pressure is at least 345 kPa (3.45 bar, 3.52 kg/cm
2, 50 psi) above 16°C. If less
than specification, recover/evacuate and recharge the system with the specified amount of refrigerant.
NOTE:
At temperatures below 16 °C, leaks may not be detected since t he system may not reach 345 kPa (3.45
bar, 3.52 kg/cm
2, 50 psi).
4. Perform the leak test from the high-pressure side (compressor dischar ge a to evaporator inlet f) to the
low-pressure side (evaporator drain hose g to shaft seal k). Refer to MTC-76, "
Component". Perform a
leak check for the following areas carefully. Clean the component to be checked and move the leak
detected probe completely around the connection/component.
• Compressor Check the fitting of high- and low-pressure flexible hoses, relief valve and shaft seal.
• Condenser Check the fitting of high-pressure flexible hose and pipe, refrigerant pressure sensor.
• Liquid tank Check the refrigerant connection.
• Service valves
Check all around the service valves. Ensure service valve caps are secured on the service valves (to
prevent leaks).
NOTE:
After removing A/C manifold gauge set from service valves, wipe any residue from valves to prevent any
false readings by leak detector.
• Cooling unit (Evaporator)
With engine OFF, turn blower fan on “High” for at l east 15 seconds to dissipate any refrigerant trace in
the cooling unit. Wait a minimum of 10 minutes accumulation time (refer to the manufacturer’s recom-
mended procedure for actual wait time) before insert ing the leak detector probe into the drain hose.
Keep the probe inserted for at least 10 seconds. Use c aution not to contaminate the probe tip with water
or dirt that may be in the drain hose.
5. If a leak detector detects a leak, verify at least once by blowing compressed air into area of suspected
leak, then repeat check as outlined above.
SHA706E
SHA708EA
Revision: May 2010 2011 Versa

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PG-17
< SERVICE INFORMATION >
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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)
System DescriptionINFOID:0000000005928343
• IPDM E/R (Intelligent Power Distribution Module Engi ne 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 co mponent via ECM, BCM and CAN communication lines.
CAUTION:
None of the IPDM E/R integr ated 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 signal s 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 wiper Until 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.
Revision: May 2010 2011 Versa

PG-20
< SERVICE INFORMATION >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
*1 Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is in ACC position, display may no t be cor-
rect.
*2 This item is displayed, but does not function.
CAN DIAG SUPPORT MNTR
Refer to LAN-9, "Description" .
ACTIVE TEST
Display Item List
Auto Active TestINFOID:0000000005928347
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, pres s front door switch LH 10 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.
Theft warning
horn request THFT HRN REQ ON/OFF
XX Signal status input from BCM
Horn chirp HORN CHIRP ON/OFF XX Output status of IPDM E/R
Daytime light re-
quest DTRL REQ ON/OFF
XX Signal status input from BCM
Item name
CONSULT-III
screen display Display or unit Monitor item selection
Description
ALL
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
Test name CONSULT-III screen display Description
Head, tail, fog lamp output EXTERNAL LAMPS With 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 DEFOGGER With a certain ON-OFF operation, the rear defogger relay can be oper-
ated.
Front wiper (HI, LO) output FRONT WIPER With a certain operation (OFF, HI ON, LO ON), the front wiper relays
(Lo, Hi) can be operated.
Cooling fan output MOTOR FAN With 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.
Revision: May 2010 2011 Versa

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PG-21
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NOTE:
When auto active test mode has to be cancelled halfway, turn ignition switch OFF.
CAUTION:
Be sure to perform BL-44, "
Door Switch Check (Hatchback)" or BL-47, "Door Switch Check
(Sedan)" when the auto active test cannot be performed.
INSPECTION IN AUTO ACTIVE TEST MODE
When auto active test mode is actuated, the following six steps are repeated three times.
(A): Oil pressure warning lamp is blinking when the auto active test is operating.
WKIA5988E
Item Number Test Item Operation Time/Frequency
1 Rear window defogger 10 seconds
2 Front wipers LOW 5 seconds then HIGH 5 seconds
3 Daytime light system (Canada only) 10 seconds
3 Tail, license, and parking lamps 10 seconds
3 Front fog lamps 10 seconds
4 Headlamps (low) 20 seconds
4 Headlamps (high) ON-OFF 5 times
5 A/C compressor (magnet clutch) ON-OFF 5 times
6 Cooling fan LOW 5 seconds then HIGH 5 seconds
Revision: May 2010 2011 Versa

PG-22
< SERVICE INFORMATION >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Concept of Auto Active Test
• IPDM E/R actuates auto active test mode when it re ceives door switch signal from BCM via CAN communi-
cation line. Therefore, when auto active test mode is activated successfully, CAN communication between
IPDM E/R and BCM is normal.
• If any of the systems controll ed by IPDM E/R cannot be operated, possible cause can be easily diagnosed
using auto active test.
Diagnosis chart in auto active test mode
WKIA5665E
Symptom Inspection contents Possible cause
Rear window defogger
does not operate. Perform auto active
test. Does rear win-
dow defogger oper-
ate?YES • BCM signal input circuit
NO • Rear window defogger relay
• Open circuit of rear window defogger
•IPDM E/R malfunction
• Harness or connector malfunction between IPDM E/R and rear window
defogger
Any of front wipers, tail
and parking lamps, front
fog lamps, daytime light
system (Canada only),
and headlamps (High,
Low) do not operate. Perform auto active
test. Does system in
question operate?YES • BCM signal input system
NO • Lamp/wiper motor malfunction
• Lamp/wiper motor ground circuit malfunction
• Harness/connector malfunction between IPDM E/R and system in ques-
tion
• IPDM E/R (integrated relay) malfunction
A/C compressor does
not operate. Perform auto active
test. Does magnet
clutch operate?YES
• BCM signal input circuit
• CAN communication signal between BCM and ECM
• CAN communication signal between ECM and IPDM E/R
NO • Magnet clutch malfunction
• Harness/connector malfunction between IPDM E/R and magnet clutch
• IPDM E/R (integrated relay) malfunction
Cooling fan does not op-
erate. Perform auto active
test. Does cooling fan
operate?YES
• ECM signal input circuit
• CAN communication signal between ECM and IPDM E/R
NO • Cooling fan motor malfunction
• Harness/connector malfunction between IPDM E/R and cooling fan mo-
tor
• IPDM E/R (integrated relay) malfunction
Oil pressure warning
lamp does not operate. Perform auto active
test. Does oil pressure
warning lamp blink?YES
• Harness/connector malfunction between IPDM E/R and oil pressure
switch
• Oil pressure switch malfunction
•IPDM E/R
NO • CAN communication signal between BCM and combination meter
• Combination meter
Revision: May 2010
2011 Versa

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PG-25
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Terminal and Reference Value for IPDM E/RINFOID:0000000005928350
Te r m i n a l Wire
color Signal name Signal
input/
output Measuring condition
Reference value
(Approx.)
Ignition
switch Operation or condition
1 R Battery power supply Input OFF —Battery voltage
2 G Battery power supply Input OFF —Battery voltage
3YECM Relay Output— Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
4GECM relay Output— Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
6R Daytime light relay
control Input ON Daytime light system active. Less than battery voltage
Daytime light system inactive. Battery voltage
7 G ECM relay control Input — Ignition switch ON or START
0V
Ignition switch OFF or ACC Battery voltage
8G Throttle control motor
relay
Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
11 W A/C compressor Output ON or
START A/C switch ON or defrost A/C
switch
Battery voltage
A/C switch OFF or defrost A/C
switch 0V
12 O Ignition switch sup-
plied power Input —OFF or ACC
0V
ON or START Battery voltage
14 LG
(M/T) R
(A/T or
CVT) Fuse 49
Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
15 V Fuse 50 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
16 BR Fuse 51 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
17 Y Battery power supply Output — —Battery voltage
19 R Starter motor Output START—Battery voltage
20 L
(with A/C)
LG
(with-
out A/
C) Cooling fan relay-1 Output — Conditions correct for cooling
fan low operation.
Battery voltage
Conditions not correct for
cooling fan low operation. 0V
22 G Battery power supply Input — —Battery voltage
23 L Cooling fan relay-2 Input — Conditions correct for cooling
fan high operation
Battery voltage
Conditions not correct for
cooling fan high operation 0V
Revision: May 2010
2011 Versa

PG-26
< SERVICE INFORMATION >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
24 Y Cooling fan relay-3 Output — Conditions correct for cooling
fan high operation
Battery voltage
Conditions not correct for
cooling fan high operation 0V
26 O Tail lamp relay (park-
ing lamps) Output — Lighting switch in 2nd position Battery voltage
27 BR Tail lamp relay (park-
ing lamps)
Output — Lighting switch in 2nd position Battery voltage
28 GR Tail lamp relay (park-
ing lamps) Output — Lighting switch in 2nd position Battery voltage
29 P Tail lamp relay (park-
ing lamps) Output — Lighting switch in 2nd position Battery voltage
30
(A/T
only) R Fuse 54
Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
31 O Fuse 55 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
32 L Wiper high speed sig-
nal
OutputON or
START Wiper switch OFF, LO, INT
0V
HI Battery voltage
33 Y Wiper low speed sig-
nal
OutputON or
START Wiper switch OFF
0V
LO or INT Battery voltage
35 BR Starter relay (inhibit
switch) InputON or
START Selector lever in "P" or "N"
(CVT or A/T) or clutch pedal
depressed (M/T)
Battery voltage
Selector lever any other posi-
tion (CVT or A/T) or clutch
pedal released (M/T) 0V
36 BR Fuel pump relay Output — Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
37 G Oil pressure switch Input ON or
START Engine running and oil pres-
sure within specification
Battery voltage
Engine not running or oil pres-
sure below specification 0V
38 R Wiper auto stop signal Input ON or
START Wipers not in park position
Battery voltage
Wipers in park position 0V
39 B Ground Input ——0V
40 P CAN-L — ON— —
41 L CAN-H — ON— —
45 R Horn relay control Input — Horn switch PUSHED, alarm
switch activated or door lock/
unlock is confirmed when op-
erating lock system via the
keyfob
0V
Horn switch released, alarm
not active, keyfob not active Battery voltage
46 Y Throttle control motor
relay control Input —Ignition switch ON or START
0V
Ignition switch OFF or ACC Battery voltage
47 GR Fuel pump relay con-
trol Input —Ignition switch ON or START
0V
Ig niti

on switch OFF or ACC Battery voltage
Te r m i n a l
Wire
color Signal name Signal
input/
output Measuring condition
Reference value
(Approx.)
Ignition
switch Operation or condition
Revision: May 2010
2011 Versa

PG-58
< SERVICE INFORMATION >
HARNESS
Wiring Diagram Codes (Cell Codes)
INFOID:0000000005928356
Use the chart below to find out what each wiring diagram code stands for.
Refer to the wiring diagram code in the alphabetical index to find the location (page number) of each wiring
diagram.
D4 D406 W/2 : Back door request switch C2 D413 B/1 : Rear window defogger (-)
E2 D407 W/2 : High mounted stop lamp
Code Section Wiring Diagram Name
ABS BRC Anti-lock Brake System
A/C,M MTC Manual Air Conditioner
APPS1 EC Accelerator Pedal Position Sensor
A/F EC Air Fuel Ratio Sensor 1
A/FH EC Air Fuel Ratio Sensor 1 Heater
APPS2 EC Accelerator Pedal Position Sensor
APPS3 EC Accelerator Pedal Position Sensor
ASC/BS EC ASCD Brake Switch
ASC/SW EC ASCD Steering Switch
ASCBOF EC ASCD Brake Switch
ASCIND EC ASCD Indicator
AT/IND DI A/T Indicator Lamp
AUDIO AV Audio
BACK/L LT Back-up Lamp
BA/FTS AT A/T Fluid Temperature Sensor and TCM Power Supply
B/DOOR BL Back Door Opener
BRK/SW EC Brake Switch
CAN AT CAN Communication Line
CAN CVT CAN Communication Line
CAN EC CAN Communication Line
CAN LAN CAN System
CHARGE SC Charging System
CHIME DI Warning Chime
COOL/F EC Cooling Fan Control
COMBSW LT Combination Switch
COMM AV Audio Visual Communication System
CVTIND DI CVT Indicator Lamp
D/LOCK BL Power Door Lock
DEF GW Rear Window Defogger
DTRL LT Headlamp - With Daytime Light System
ECTS EC Engine Coolant Temperature Sensor
ENGSS AT Engine Speed Signal
EPS STC Electronic Controlled Power Steering
ETC1 EC Electric Throttle Control Function
ETC2 EC Throttle Control Motor Relay
ETC3 EC Throttle Control Motor
F/FOG LT Front Fog Lamp
F/PUMP EC Fuel Pump
FTS AT A/T Fluid Temperature Sensor
FTS CVT CVT Fluid Temperature Sensor Circuit
FTTS EC Fuel Tank Temperature Sensor
FUEL EC Fuel Ignition System Function
HEATER MTC Heater System
Revision: May 2010 2011 Versa