front NISSAN TIIDA 2007 Service Repair Manual

HAC-20
< COMPONENT DIAGNOSIS >[MANUAL AIR CONDITIONER]
BLOWER MOTOR
2.CHECK POWER SUPPLY FOR FRONT BLOWER MOTOR
1. Turn ignition switch OFF.
2. Disconnect front blower motor connector.
3. Turn ignition switch ON.
4. Check voltage between front blower motor harness connector
M62 terminal 1 and ground.
OK or NG
OK >> GO TO 6.
NG >> Check power supply circuit and 15A fuses [Nos. 15 and 17, located in the fuse block (J/B)].
 If fuses are OK, reinstall fuses and GO TO 3.
 If fuses are NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
3.CHECK BLOWER MOTOR RELAY POWER SUPPLY CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect blower motor relay connector.
3. Turn ignition switch ON.
4. Check voltage between blower motor relay harness connector J-
1 terminal 1, 5 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4.CHECK BLOWER MOTOR RELAY (SWITCH SIDE) CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Check continuity between blower motor relay harness connector
J-1 (A) terminal 3 and front blower motor harness connector
M62 (B) terminal 1.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5.CHECK BLOWER MOTOR RELAY GROUND CIRCUIT
Check continuity between blower motor relay harness connector J-1
terminal 2 and ground.
OK or NG
OK >> Replace blower motor relay.
NG >> Repair harness or connector.
Te r m i n a l s
Vo l ta g e
(Approx.) (+) (−)
Connector Terminal
Ground
Front blower
motor: M621 Battery voltage
WJIA2228E
1 - Ground Battery voltage should exist.
5 - Ground Battery voltage should exist.
WJIA1783E
Continuity should exist.
WJIA2263E
Continuity should exist.
WJIA2264E

BLOWER MOTOR
HAC-21
< COMPONENT DIAGNOSIS >[MANUAL AIR CONDITIONER]
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6.CHECK FRONT BLOWER MOTOR
Check continuity between front blower motor terminals 1 and 2.
NOTE:
Ensure that there are no foreign particles inside the A/C unit assem-
bly for a smooth rotation of the front blower motor.
OK or NG
OK >> GO TO 7.
NG >> Replace front blower motor. Refer to XX-XX, "*****"
.
7.CHECK CIRCUIT CONTINUITY BETWEEN FRONT BLOWER MOTOR AND FRONT AIR CONTROL
1. Disconnect front air control connector.
2. Check continuity between front blower motor harness connector
M62 (A) terminal 2 and front air control harness connector M33
(B) terminal 13.
OK or NG
OK >> GO TO 8.
NG >> Repair harness or connector.
8.CHECK FAN SWITCH
Check continuity between front air control terminal 9 and 10, 11, 12,
13, 14.
OK or NG
OK >> GO TO 9.
NG >> Replace front air control. Refer to XX-XX, "*****"
.
9.CHECK FAN SWITCH GROUND CIRCUIT
Check continuity between front air control harness connector M33
terminal 9 and ground.
OK or NG
OK >> Inspection End.
NG >> Repair harness or connector.
10.CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND FRONT BLOWER MOTOR
RESISTOR1 - 2 : Continuity should exist.
WJIA2230E
2 - 13 : Continuity should exist.
AWIIA0339ZZ
Terminals Condition Continuity
914 Blower control dial: OFF
Ye s 10 Blower control dial: 1-speed
11 Blower control dial: 2-speed
12 Blower control dial: 3-speed
13 Blower control dial: 4-speed
SJIA0732E
Continuity should exist.
SJIA0734E

HAC-22
< COMPONENT DIAGNOSIS >[MANUAL AIR CONDITIONER]
BLOWER MOTOR
1. Turn ignition switch OFF.
2. Disconnect front blower motor resistor and front air control con-
nectors.
3. Check continuity between front air control harness connector
M33 (A) terminals and front blower motor resistor harness con-
nector M95 (B) terminals.
OK or NG
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 XX-XX, "*****".
NG >> Replace front air control. Refer to XX-XX, "*****"
.
AB
Continuity
Connector Terminal Connector Terminal
Front air control:
M3310
Front blower
motor resistor:
M951
Ye s 11 2
12 3
13 4
SJIA0733E
Terminals Condition Continuity
914 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

MAGNET CLUTCH
HAC-25
< COMPONENT DIAGNOSIS >[MANUAL AIR CONDITIONER]
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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 XX.
NG >> GO TO 4.
4.CHECK CIRCUIT CONTINUITY BETWEEN 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 XX.
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 19.
6.CHECK BCM INPUT (COMPRESSOR ON) SIGNAL
1. Turn ignition switch OFF.
2. Check compressor ON/OFF signal. Refer to HAC-15, "
CONSULT-III Function (BCM)".
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND BCM
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 M19 (B) termi-
nal 61.
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.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
1 - 61 :Continuity should exist
AWIIA0448ZZ

HAC-26
< COMPONENT DIAGNOSIS >[MANUAL AIR CONDITIONER]
MAGNET CLUTCH
2. Check refrigerant pressure sensor. Refer to EC-326, "Component Function Check" (HR16DE with EURO-
OBD), XX-XX, "*****"
(HR16DE without EURO-OBD), EC-988, "Component Function Check" (MR18DE)
or EC-1166, "
Diagnosis Procedure" (K9K).
.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 XX.
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 BETWEEN BCM AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector and BCM connector.
3. Check continuity between BCM harness connector M19 (A) ter-
minal 50 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
FAN CONTROL DIAL ON : FAN ON SIG ON
FAN CONTROL DIAL OFF : FAN ON SIG OFF
Te r m i n a l s
Voltag e
(Approx.) (+)
(-)
Connector Terminal
Front air con-
trol: M3314 Ground
SJIA0750E
ZJIA0583J
AB
Continuity
Connector Terminal Connector Terminal
BCM: M19 50Front air control:
M3314 Yes
AWIIA0449ZZ

MAGNET CLUTCH
HAC-27
< COMPONENT DIAGNOSIS >[MANUAL AIR CONDITIONER]
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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 XX.
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.
OK or NG
OK >> GO TO 15.
NG >> GO TO 17.
15.CHECK A/C SWITCH CIRCUIT9 - 14 :Continuity should exist
SJIA0753E
9 - Ground :Continuity should exist
SJIA0754E
Te r m i n a l s
Voltag e
(Approx.) (+)
(-)
Connector Terminal
Front air control:
M331Ground
SJIA0755E
ZJIA0584J

HAC-28
< COMPONENT DIAGNOSIS >[MANUAL AIR CONDITIONER]
MAGNET CLUTCH
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 XX.
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 INTAKE SENSOR
Refer to HAC-31, "
Intake Sensor Component Inspection".
OK or NG
OK >> GO TO 18.
NG >> Repair or replace as necessary.
18.CHECK CAN COMMUNICATION
Check CAN communication. Refer to LAN-22, "Trouble Diagnosis Flow Chart".
BCM – ECM
 ECM – IPDM E/R
OK or NG
OK >> Replace BCM. Refer to BCS-57, "Removal and Installation of BCM".
NG >> Repair or replace malfunctioning part(s).
19.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 M19 terminal
49 and ground.
OK or NG
OK >> Replace BCM. Refer to BCS-57, "Removal and Installation of BCM".
NG >> GO TO 20.
20.CHECK CIRCUIT CONTINUITY BETWEEN DEFROST A/C SWITCH AND BCM 1 - 8 :Continuity should exist
SJIA0756E
8 - Ground :Continuity should exist
SJIA0758E
49 - Ground :Continuity should exist
AWIIA0450ZZ

HAC-40
< COMPONENT DIAGNOSIS >[MANUAL AIR CONDITIONER]
PTC HEATER CONTROL SYSTEM
19.CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT TEMPERATURE SENSOR AND PTC CONTROL
UNIT
Check continuity between ambient temperature sensor harness con-
nector M60 (A) terminal 3 and PTC control unit harness connector
M84 (B) terminal 8.
Is the inspection result normal
YES >> 1. If equipped with manual transmission, GO TO 20.
2. If equipped with automatic transmission, GO TO 22.
NO >> Repair harness or connector.
20.CHECK ENGINE RPM SIGNAL (MANUAL TRANSMISSION)
1. Reconnect PTC control unit.
2. Start the engine.
3. Check voltage between PTC control unit harness connector
M84 terminal 4 and ground.
Is the inspection result normal
YES >> GO TO 22.
NO >> GO TO 21.
21.CHECK CONTINUITY OF ENGINE RPM CIRCUIT BETWEEN FRONT AIR CONNTROL AND PTC CON-
TROL UNIT (MANUAL TRANSMISSION)
1. Turn ignition switch OFF.
2. Disconnect ECM and PTC control unit connector.
3. Check continuity between PTC control unit harness connector
M84 (A) terminal 4 and ECM harness connector F10 (B) termi-
nal 13.
4. Check continuity between PTC control unit harness connector
M84 (A) terminal 4 and ground.
Is the inspection result normal
YES >> Replace ECM. Refer to XX.
NO >> Repair harness or connector.
22.CHECK BCM INPUT (FAN ON) SIGNAL
AB
Continuity
Connector Terminal Connector Terminal
Ambient temperature
sensor: M643PTC control unit:
M848Yes
AWIIA0464ZZ
Te r m i n a l s
Vo l ta g e
(Approx.) (+) (−)
Connector Terminal
Ground
PTC control unit: M84 4 4.2V
SJIA0924E
AB
Continuity
Connector Terminal Connector Terminal
PTC control unit: M84 4 ECM: F10 13 Yes
A
GroundContinuity
Connector Terminal
PTC control unit: M84 4 No
SJIA0925E

HAC-80
< SYMPTOM DIAGNOSIS >[MANUAL AIR CONDITIONER]
INSUFFICIENT COOLING
Gauge indication Refrigerant cycle Probable cause Corrective action
Low-pressure side becomes nega-
tive.
Liquid tank or front/rear side of
expansion valve’s pipe is frost-
ed or dewed.High-pressure side is closed
and refrigerant does not flow.
↓
Expansion valve or liquid tank
is frosted.Leave the system at rest until
no frost is present. Start it
again to check whether or not
the malfunction is caused by
water or foreign particles.
 If water is the cause, initially
cooling is okay. Then the wa-
ter freezes causing a block-
age. Drain water from
refrigerant or replace refrig-
erant.
 If due to foreign particles, re-
move expansion valve and
remove the particles with dry
and compressed air (not
shop air).
 If either of the above meth-
ods cannot correct the mal-
function, replace expansion
valve.
 Replace liquid tank.
 Check oil for contamination.
AC362A

HAC-84
< PRECAUTION >[MANUAL AIR CONDITIONER]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001683796
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRS section.
 Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precaution for Procedures Without Cowl Top CoverINFOID:0000000001203084
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Working with HFC-134a (R-134a)INFOID:0000000001203085
WARNING:
 CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. These refrigerants
must never be mixed, even in the smallest amounts. If the refrigerants are mixed a compressor mal-
function is likely to occur.
 Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components. If
oil other than that specified is used, compressor malfunction is likely to occur.
 The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following
handling precautions must be observed:
- When removing refrigerant components from a vehicle, immediately cap (seal) the component to
minimize the entry of moisture from the atmosphere.
- When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just
before connecting the components. Connect all refrigerant loop components as quickly as possible
to minimize the entry of moisture into system.
- Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without
proper sealing, oil will become moisture saturated and should not be used.
- Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat.
Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refrigerant. If acci-
dental system discharge occurs, ventilate work area before resuming service. Additional health and
safety information may be obtained from refrigerant and oil manufacturers.
- Do not allow A/C oil to come in contact with styrofoam parts. Damage may result.
PIIB3706J