NISSAN TIIDA 2010 Service Repair Manual

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: January 20102010 Versa

TROUBLE DIAGNOSISMTC-43
< SERVICE INFORMATION >
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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: January 20102010 Versa

MTC-44
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
OK or NG
OK >> • GO TO 18 (with CVT).• GO TO 19 (without CVT).
NG >> GO TO 21.
18.CHECK THERMO CONTROL AMP. GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between thermo control amp. harness connec- tor M42 terminal 2 and ground.
OK or NG
OK >> Repair thermo control amp. jumper as necessary.
NG >> Repair harness or connector.
19.CHECK POWER SUPPLY FOR THERMO CONTROL AMP.
Check voltage between thermo control amp. harness connector M42
terminal 1 and ground.
OK or NG
OK >> GO TO 20.
NG >> Check power supply circuit and 10A fuse [No. 16, located in the fuse block (JB)]. Refer to PG-74
.
• If fuse is OK, check harness for open circuit. Repair or
replace if necessary.
• If fuse is NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
20.CHECK THERMO CONTROL AMP. GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between thermo control amp. harness connec- tor M42 terminal 2 and ground.
OK or NG
OK >> Replace thermo control amp. Refer to MTC-58,
"Removal and Installation".
NG >> Repair harness or connector.
21.CHECK CIRCUIT CONTINUITY BETWEEN THERMO CONTROL AMP. AND BCM
Te r m i n a l s
Vo l ta g e
(Approx.)
(+)
(-)
Connector Terminal
Thermo control amp.: M42 3Ground
ZJIA0719J
2 - Ground
:Continuity should exist
SJIA0763E
1 - Ground :Battery voltage
SJIA0762E
2 - Ground:Continuity should exist
SJIA0763E
Revision: January 20102010 Versa

TROUBLE DIAGNOSISMTC-45
< SERVICE INFORMATION >
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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: January 20102010 Versa

MTC-46
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Check continuity between A/C defrost switch harness connector
M41 terminal 16 and ground.
OK or NG
OK >> Replace defrost A/C switch.
NG >> Repair harness or connector.
Insufficient CoolingINFOID:0000000005396503
SYMPTOM: Insufficient cooling
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Turn temperature control dial counterclockwise to maximum cold position.
2. Check for cold air at discharge air outlets.
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 DRIVE BELT TENSION
Check compressor belt tension. Refer to EM-14, "
Checking" (HR16DE) or EM-132, "Checking Drive Belts"
(MR18DE).
OK or NG
OK >> GO TO 5.
NG >> Adjust or replace compressor belt. Refer to EM-15, "
Removal and Installation" (HR16DE) or EM-
132, "Removal and Installation" (MR18DE).
5.CHECK AIR MIX DOOR CABLE
Check and verify air mix door cable operation. Refer to MTC-65, "
Air Mix Door Cable Adjustment".
Does air mix door operate correctly?
YES >> GO TO 6.
NO >> Repair or replace as necessary.
6.CHECK COOLING FAN MOTOR OPERATION
Check and verify cooling fan motor for smooth operation. Refer to EC-911, "
Overall Function Check"
(MR18DE) or EC-362, "Component Function Check" (HR16DE).
Does cooling fan motor operate correctly?
YES >> GO TO 7.
NO >> Check cooling fan motor. Refer to EC-914, "
Diagnosis Procedure" (MR18DE) or EC-362, "Com-
ponent Function Check" (HR16DE).
7.CHECK FOR EVAPORATOR FREEZE UP16 - Ground :Continuity should exist
WJIA2255E
Revision: January 20102010 Versa

TROUBLE DIAGNOSISMTC-47
< SERVICE INFORMATION >
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Start engine and run A/C. Check for evaporator freeze up.
Does evaporator freeze up?
YES >> Perform diagnostic work flow. Refer to "DIAGNOSTIC WORK FLOW".
NO >> GO TO 8.
8.CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to "PERFORMANCE CHART".
OK or NG
OK >> GO TO 9.
NG >> Perform diagnostic work flow. Refer to "DIAGNOSTIC WORK FLOW".
9.CHECK AIR DUCTS
Check ducts for air leaks.
OK or NG
OK >> If the symptom still exists, perform a complete operational check. Refer to MTC-31, "Operational
Check". If other symptoms exist, refer to MTC-23, "How to Perform Trouble Diagnosis for Quick
and Accurate Repair".
NG >> Repair air leaks.
DIAGNOSTIC WORK FLOW
Revision: January 20102010 Versa

MTC-48
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
*1MTC-93, "Checking System for
Leaks Using the Fluorescent Leak
Detector"
*2MTC-79, "Removal and Installation of
Compressor - HR16DE" or MTC-81,
"Removal and Installation of Com-
pressor - MR18DE"
*3 "PERFORMANCE CHART"
*4 "TROUBLE DIAGNOSIS FOR AB- NORMAL PRESSURE" *5
MTC-33, "
Air Mix Door"
AWIIA0999GB
Revision: January 20102010 Versa

TROUBLE DIAGNOSISMTC-49
< SERVICE INFORMATION >
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PERFORMANCE CHART
Test Condition
*1 MTC-63, "Removal and Installation"*2MTC-34, "Front Blower Motor Circuit"*3 MTC-79, "Removal and Installation of
Compressor - HR16DE" or MTC-81,
"Removal and Installation of Com-
pressor - MR18DE"
*4 EM-14, "Checking" (HR16DE) EM-
132, "Checking Drive Belts"
(MR18DE) *5
MTC-79, "
Removal and Installation of
Compressor - HR16DE" or MTC-81,
"Removal and Installation of Com-
pressor - MR18DE"
AWIIA1000GB
Revision: January 20102010 Versa

MTC-50
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Testing must be performed as follows:
TEST READING
Recirculating-to-discharge Air Temperature Table
Ambient Air Temperature-to-operating Pressure Table
*1: With blower control dial in the "1" position
*2: With blower control dial in the "4" position.
TROUBLE DIAGNOSIS FOR ABNORMAL PRESSURE
Whenever system’s high and/or low side pressure(s) is/are abnormal, diagnose using a manifold gauge. The
marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Since the
standard (usual) pressure, however, differs from vehicle to vehicle, refer to above table (Ambient air tempera-
ture-to-operating pressure table).
Vehicle condition Indoors or in the shade (in a well-ventilated place)
Doors Closed
Door window Open
Hood Open
TEMP. Max. COLD
Mode control dial (Ventilation) set
Intake door lever (Recirculation) set
Blower speed Max. speed set
Engine speed Idle speed
Operate the air conditioning system for 10 minutes before taking measurements.
Inside air (Recirculating air) at blower assembly inlet Discharge air temperature at center ventilator
°C ( °F)
Relative humidity
% Air temperature
°C ( °F)
50 - 60 20 (68)
7.2 - 9.1 (45 - 48)
25 (77) 11.4 - 13.8 (53 - 57)
30 (86) 15.5 - 18.4 (60 - 65)
35 (95) 20.3 - 23.7 (69 - 75)
60 - 70 20 (68)
9.1 - 10.9 (48 - 52)
25 (77) 13.8 - 16.2 (57 - 61)
30 (86) 18.4 - 21.3 (65 - 70)
35 (95) 23.7 - 27.1 (75 - 81)
Ambient air
High-pressure (Discharge side)
kPa (bar, kg/cm
2 , psi) Low-pressure (Suction side)
kPa (bar, kg/cm2 , psi)
Relative humidity
% Air temperature
°C ( °F)
50 - 70 20 (68)
843 - 1,036 *1
(11.08 - 13.63, 8.6 - 10.6, 122 - 150) 159.0 - 194.0
(1.59 - 1.94, 1.62 - 1.98, 23.1 - 28.1)
25 (77) 1,094 - 1,338 *1
(10.94 - 13.38, 11.2 - 13.6, 159 - 194) 196.3 - 240.0
(1.96 - 2.40, 2.00 - 2.45, 28.5 - 34.8)
30 (86) 1,298 - 1,590 *1
(12.98 - 15.90, 13.2 - 16.2, 188 - 231) 248.0 - 302.7
(2.48 - 3.03, 2.53 - 3.09, 36.0 - 43.9)
35 (95) 1,383 - 1,688 *2
(13.83 - 16.88, 14.1 - 17.2, 201 - 245) 308.8 - 377.4
(3.09 - 3.77, 3.15 - 3.85, 44.8 - 54.7)
40 (104) 1,628 - 1,988 *2
(16.28 - 19.88, 16.6 - 20.3, 236 - 288) 377.4 - 461.2
(3.77 - 4.61, 3.85 - 4.70, 54.7 - 66.8)
Revision: January 20102010 Versa

TROUBLE DIAGNOSISMTC-51
< SERVICE INFORMATION >
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Both High- and Low-pressure Sides are Too High
High-pressure Side is Too High and Low-pressure Side is Too Low
High-pressure Side is Too Low and Low-pressure Side is Too High
Gauge indication
Refrigerant cycle Probable causeCorrective action
Both high- and low-pressure
sides are too high. Pressure is reduced soon af-
ter water is splashed on con-
denser.
Excessive refrigerant charge in refrig-
eration cycle. Reduce refrigerant until
specified pressure is ob-
tained.
Air suction by cooling fan is in-
sufficient. Insufficient condenser cooling perfor-
mance.
↓
1. Condenser fins are clogged.
2. Improper fan rotation of cooling
fan. • Clean condenser.
• Check and repair cooling
fan if necessary.
• Low-pressure pipe is not cold.
• When compressor is
stopped high-pressure val-
ue quickly drops by approx-
imately 196 kPa (1.96 bar, 2
kg/cm
2 , 28 psi). It then de-
creases gradually thereaf-
ter. Poor heat exchange in condenser
(After compressor operation stops,
high-pressure decreases too slowly.).
↓
Air in refrigeration cycle.
Evacuate repeatedly and
recharge system.
Engine tends to overheat. Engine cooling systems malfunction. Check and repair each en-
gine cooling system.
• An area of the low-pressure pipe is colder than areas
near the evaporator outlet.
• Plates are sometimes cov- ered with frost. • Excessive liquid refrigerant on low-
pressure side.
• Excessive refrigerant discharge flow.
• Expansion valve is open a little
compared with the specification.
↓
Improper expansion valve adjust-
ment. Replace expansion valve.
AC359A
Gauge indication
Refrigerant cycle Probable causeCorrective action
High-pressure side is too high
and low-pressure side is too low. Upper side of condenser and
high-pressure side are hot,
however, liquid tank is not so
hot.High-pressure tube or parts located
between compressor and condenser
are clogged or crushed. • Check and repair or re-
place malfunctioning
parts.
• Check oil for contami- nation.
AC360A
Gauge indication Refrigerant cycle Probable causeCorrective action
High-pressure side is too low
and low-pressure side is too
high. High- and low-pressure sides
become equal soon after com-
pressor operation stops. Compressor pressure operation
is improper.
↓
Damaged inside compressor
packings.
Replace compressor.
No temperature difference be-
tween high- and low-pressure
sides. Compressor pressure operation
is improper.
↓
Damaged inside compressor
packings.
Replace compressor.
AC356A
Revision: January 20102010 Versa