2011 NISSAN TIIDA RON 91

MTC-38
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
OK >> GO TO 11.
NG >> Repair harness or connector.
11 .CHECK FAN SWITCH
Check continuity between front air control terminal 9 and 10, 11, 12,
13, 14.
OK or NG
OK >> Replace the front blower motor resistor. Refer to MTC-67, "Removal and Installation".
NG >> Replace front air control. Refer to MTC-59, "
Removal and Installation".
Magnet Clutch Circuit (If Equipped)INFOID:0000000005930853
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OP ERATIONAL CHECK - MAGNET CLUTCH
1. Turn ignition switch ON.
2. Turn blower control dial to the desired (1 to 4 speed) position.
3. Press the A/C switch. A/C indicator will turn on.
4. Confirm that the compressor clut ch engages (sound or visual inspection).
Can the symptom be duplicated?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to MTC-31, "
Operational Check".
Does another symptom exist?
YES >> Refer to MTC-23, "How to Perform Trouble Diagnosis for Quick and Accurate Repair".
NO >> System OK.
3.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.CHECK COMPRESSOR BELT TENSION
Check compressor belt tension. Refer to EM-13, "
Checking" (HR16DE) or EM-132, "Checking Drive Belts"
(MR18DE).
OK or NG
OK >> GO TO 5.
NG >> Adjust or replace A/C compressor belt. Refer to EM-14, "
Removal and Installation" (HR16DE) or
EM-132, "
Removal and Installation" (MR18DE).
5.CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to MTC-46, "
Insufficient Cooling".
OK or NG
OK >> GO TO 6.
NG >> Perform trouble diagnosis for unusual pressure. Refer to MTC-46, "
Insufficient Cooling".
TerminalsConditionContinuity
9 14 Fan control dial: OFF
Ye s
10 Fan control dial: 1-speed
11 Fan control dial: 2-speed
12 Fan control dial: 3-speed
13 Fan control dial: 4-speed
SJIA0732E
Revision: May 2010 2011 Versa

MTC-40
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
OK or NG
OK >> GO TO 3.
NG >> Check harness for open circuit. Repair or replace if necessary.
3.CHECK POWER SUPPLY FOR A/C COMPRESSOR
1. Disconnect A/C compressor connector.
2. Start the engine.
3. Turn blower control dial and A/C switch ON.
4. Check voltage between A/C compressor harness connector F3 terminal 1 and ground.
OK or NG
OK >> Replace magnet clutch. Refer to MTC-78, "Removal and
Installation of Compressor - HR16DE" or MTC-80,
"Removal and Installation of Compressor - MR18DE".
NG >> GO TO 4.
4.CHECK CIRCUIT CONTINUITY BETW EEN IPDM E/R AND COMPRESSOR
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between A/ C compressor harness connector
F3 (A) terminal 1 and IPDM E/R harness connector E43 (B) ter-
minal 11.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and
Installation of IPDM E/R".
NG >> Repair harness or connector.
5.CHECK DEFROST A/C SWITCH
1. Start the engine.
2. Turn the mode control dial to (DEF) position.
Does the magnet clutch operate
OK >> GO TO 6.
NG >> GO TO 23.
6.CHECK BCM INPUT (COMPRESSOR ON) SIGNAL
1. Turn ignition switch OFF.
2. Check compressor ON/OFF signal. Refer to MTC-22, "
CONSULT-III Function (BCM)".
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.CHECK CIRCUIT CONTINUITY BETWEE N FRONT AIR CONTROL AND BCM
:Battery voltage should exist
1 - Ground :Battery voltage
SJIA0743E
1 - 11 :Continuity should exist
WJIA2233E
A/C SW ON : AIR COND SW ON
A/C SW OFF : AIR COND SW OFF
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISMTC-41
< SERVICE INFORMATION >
C
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F
G H
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M A
B
MTC
N
O P
1. Turn ignition switch OFF.
2. Disconnect front air control and BCM connector.
3. Check continuity between front air control harness connector
M33 (A) terminal 1and BCM harness connector M18 (B) termi-
nal 27.
OK or NG
OK >> GO TO 8.
NG >> Repair harness or connector.
8.CHECK REFRIGERANT PRESSURE SENSOR
1. Reconnect front air control connector and BCM connector.
2. Check refrigerant pressure sensor. Refer to EC-1030, "
Diagnosis Procedure" (MR18DE) or EC-461,
"Diagnosis Procedure" (HR16DE).
.OK or NG
OK >> • WITH CONSULT-III GO TO 9.
• WITHOUT CONSULT-III GO TO 10.
NG >> Replace as necessary.
9.CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to MTC-22, "
CONSULT-III Function (BCM)".
OK or NG
OK >> GO TO 12.
NG >> GO TO 10.
10.CHECK BCM INPUT (FAN ON) SIGNAL
1. Turn ignition switch ON.
2. Turn blower control dial to "1" position.
3. Confirm fan on signal between front air control harness connec- tor M33 terminal 14 and ground using oscilloscope.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 .CHECK CIRCUIT CONTINUITY BETWEE N BCM AND FRONT AIR CONTROL
1 - 27
:Continuity should exist
SJIA0759E
FAN CONTROL DIAL ON : FAN ON SIG ON
FAN CONTROL DIAL OFF : FAN ON SIG OFF
Te r m i n a l s
Vo l ta g e
(Approx.)
(+)
(-)
Connector Terminal
Front air con- trol: M33 14 Ground
SJIA0750E
ZJIA0583J
Revision: May 2010
2011 Versa

MTC-42
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
1. Turn ignition switch OFF.
2. Disconnect front air control connector and BCM connector.
3. Check continuity between BCM harness connector M18 (A) ter-minal 28 and front air control harness connector M33 (B) termi-
nal 14.
OK or NG
OK >> GO TO 12.
NG >> Repair harness or connector.
12.CHECK FAN SWITCH CIRCUIT
1. Turn blower control dial to the OFF position.
2. Check continuity between front air control terminals 9 and 14.
OK or NG
OK >> GO TO 13.
NG >> Replace front air control. Refer to MTC-57, "
Disassem-
bly and Assembly".
13.CHECK FRONT AIR CONTROL GROUND CIRCUIT
Check continuity between front air control harness connector M33
terminal 9 and ground.
OK or NG
OK >> GO TO 14.
NG >> Repair harness or connector.
14.CHECK BCM INPUT (COMPRESSOR ON) SIGNAL
1. Reconnect BCM connector and front air control connectors.
2. Turn ignition switch ON.
3. Turn blower control dial clockwise to position "1".
4. Confirm compressor on signal between front air control harness connector M33 terminal 1 and ground using oscilloscope.
AB Continuity
Connector Terminal Connector Terminal
BCM: M18 28 Front air control:
M33 14
Yes
SJIA0751E
9 - 14 :Continuity should exist
SJIA0753E
9 - Ground :Continuity should exist
SJIA0754E
SJIA0755E
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISMTC-43
< SERVICE INFORMATION >
C
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F
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M A
B
MTC
N
O P
OK or NG
OK >> GO TO 15.
NG >> GO TO 17.
15.CHECK A/C SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. While pressing the A/C switch, check continuity between front air control terminals 1 and 8.
OK or NG
OK >> GO TO 16.
NG >> Replace front air control. Refer to MTC-57, "
Disassem-
bly and Assembly".
16.CHECK FRONT AIR CONTROL GROUND CIRCUIT
Check continuity between front air control harness connector M33
terminal 8 and ground.
OK or NG
OK >> GO TO 17.
NG >> Repair harness or connector.
17.CHECK POWER SUPPLY FOR THERMO CONTROL AMP.
1. Turn ignition switch OFF.
2. Disconnect thermo control amp. connector.
3. Turn ignition switch ON.
4. Confirm thermo amp signal between thermo control amp. har- ness connector M42 terminal 3 and ground using oscilloscope.
Te r m i n a l s
Voltag e
(Approx.)
(+)
(-)
Connector Terminal
Front air control: M33 1Ground
ZJIA0584J
1 - 8
:Continuity should exist
SJIA0756E
8 - Ground :Continuity should exist
SJIA0758E
SJIA0760E
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISMTC-45
< SERVICE INFORMATION >
C
DE
F
G H
I
K L
M A
B
MTC
N
O P
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between thermo control amp. harness connec- tor M42 (A) terminal 3 and BCM harness connector M18 (B) ter-
minal 26.
OK or NG
OK >> GO TO 22.
NG >> Repair harness or connector.
22.CHECK CAN COMMUNICATION
Check CAN communication. Refer to LAN-17, "Trouble Diagnosis Flow Chart".
•BCM – ECM
• ECM – IPDM E/R
OK or NG
OK >> Replace BCM. Refer to BCS-19, "Removal and Installation of BCM".
NG >> Repair or replace malfunctioning part(s).
23.CHECK DEFROST A/C SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Press the defrost A/C switch. NOTE:
The defrost A/C switch is located on back side of the front air
control.
4. Check continuity between BCM harness connector M18 terminal 10 and ground.
OK or NG
OK >> Replace BCM. Refer to BCS-19, "Removal and Installation of BCM".
NG >> GO TO 24.
24.CHECK CIRCUIT CONTINUITY BETWEE N DEFROST A/C SWITCH AND BCM
1. Disconnect defrost A/C switch connector.
2. Check continuity between BCM harness connector M18 (B) ter- minal 10 and defrost A/C switch harness connector M41 (A) ter-
minal 15.
OK or NG
OK >> GO TO 25.
NG >> Repair harness or connector.
25.CHECK CIRCUIT CONTINUITY BETWEE N DEFROST A/C SWITCH AND GROUND
3 - 26
:Continuity should exist
SJIA0764E
10 - Ground :Continuity should exist
WJIA2252E
10 - 15:Continuity should exist
WJIA2254E
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISMTC-49
< SERVICE INFORMATION >
C
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F
G H
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M A
B
MTC
N
O P
PERFORMANCE CHART
Test Condition
*1 MTC-63, "Removal and Installation"*2MTC-34, "Front Blower Motor Circuit"*3 MTC-78, "Removal and Installation of
Compressor - HR16DE" or MTC-80,
"Removal and Installation of Com-
pressor - MR18DE"
*4 EM-13, "Checking" (HR16DE) EM-
132, "Checking Drive Belts"
(MR18DE) *5
MTC-78, "
Removal and Installation of
Compressor - HR16DE" or MTC-80,
"Removal and Installation of Com-
pressor - MR18DE"
AWIIA1000GB
Revision: May 2010 2011 Versa

MTC-52
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Both High- and Low-pressure Sides are Too Low
Low-pressure Side Sometimes Becomes Negative
Low-pressure Side Becomes Negative
Gauge indication Refrigerant cycle Probable causeCorrective action
Both high- and low-pressure
sides are too low. • There is a big temperature dif-
ference between liquid tank
outlet and inlet. Outlet tem-
perature is extremely low.
• Liquid tank inlet and expan- sion valve are frosted. Liquid tank inside is slightly
clogged.
• Replace liquid tank.
• Check oil for contamination.
• Temperature of expansion valve inlet is extremely low as
compared with areas near liq-
uid tank.
• Expansion valve inlet may be
frosted.
• Temperature difference oc- curs somewhere in high-pres-
sure side. High-pressure pipe located be-
tween liquid tank and expansion
valve is clogged.
• Check and repair malfunc-
tioning parts.
• Check oil for contamination.
Expansion valve and liquid tank
are warm or only cool when
touched. Low refrigerant charge.
↓
Leaking fittings or componentsCheck refrigerant for leaks.
Refer to
MTC-92, "
Checking of
Refrigerant Leaks" .
There is a big temperature dif-
ference between expansion
valve inlet and outlet while the
valve itself is frosted. Expansion valve closes a little
compared with the specification.
↓
1. Improper expansion valve
adjustment.
2. Malfunctioning expansion valve.
3. Outlet and inlet may be clogged. • Remove foreign particles by
using compressed air.
• Replace expansion valve.
• Check oil for contamination.
An area of the low-pressure pipe
is colder than areas near the
evaporator outlet. Low-pressure pipe is clogged or
crushed.• Check and repair malfunc-
tioning parts.
• Check oil for contamination.
Air flow volume is not enough or
is too low. Evaporator is frozen.• Check thermo control amp.
Refer to MTC-38, "
Magnet
Clutch Circuit (If Equipped)"
.
• Replace compressor.
• Repair evaporator fins.
• Replace evaporator.
•Refer to MTC-34, "
Front
Blower Motor Circuit" .
AC353A
Gauge indication Refrigerant cycleProbable causeCorrective action
Low-pressure side sometimes be-
comes negative. • Air conditioning system does
not function and does not cy-
clically cool the compart-
ment air.
• The system constantly func-
tions for a certain period of
time after compressor is
stopped and restarted. Refrigerant does not discharge
cyclically.
↓
Moisture is frozen at expan-
sion valve outlet and inlet.
↓
Water is mixed with refrigerant.
• Drain water from refrigerant
or replace refrigerant.
• Replace liquid tank.
AC354A
Revision: May 2010 2011 Versa