NISSAN TIIDA 2007 Service Repair Manual

HAC-238
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
MAGNET CLUTCH
MAGNET CLUTCH
System DescriptionINFOID:0000000001547352
SYSTEM DESCRIPTION
Front air control controls compressor operation by intake air temperature and signal from ECM.
Low Temperature Protection Control
Front air control will turn compressor ON or OFF as determined by a signal detected by intake sensor.
When intake air temperatures are higher than 3.5°C (38°F), the com-
pressor turns ON. The compressor turns OFF when intake air tem-
peratures are lower than 2°C (36°F).
Magnet Clutch Component Function CheckINFOID:0000000001547353
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MAGNET CLUTCH
1. Turn ignition switch ON.
2. Press the A/C switch.
3. Turn mode control dial to vent mode ( ). Confirm that the compressor clutch engages (sound or visual
inspection). (Discharge air and blower speed will depend on ambient, in-vehicle and set temperatures.)
Can the symptom be duplicated?
YES >> GO TO 3.
NO >> GO TO 2.
2.PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to HAC-202, "
Operational Check".
Can a symptom be duplicated?
YES >> Refer to HAC-201, "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.PERFORM SELF-DIAGNOSIS.
Set in Self-diagnostic mode. Refer to HAC-213, "
Front Air Control Self-Diagnosis".
Are any self-diagnosis codes present?
YES >> Repair as necessary.
NO >> GO TO 5.
5. CHECK AMBIENT SENSOR CIRCUIT
Perform diagnostic procedure for the mode door motor. Refer to HAC-244, "
Ambient Sensor Diagnosis Proce-
dure".
YES or NO
YES >> GO TO 6.
NO >> Repair as necessary.
SJIA0802E

MAGNET CLUTCH
HAC-239
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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6. CHECK INTAKE SENSOR CIRCUIT
Perform diagnostic procedure for the intake sensor circuit. Refer to HAC-253, "
Intake Sensor Diagnosis Pro-
cedure".
YES or NO
YES >> GO TO 7.
NO >> Repair as necessary.
7. RECHECK FOR SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to HAC-202, "
Operational Check".
Does another symptom exist?
YES >> Repair as necessary.
NO >> Replace front air control. Refer to XXXX.
Magnet Clutch Diagnosis ProcedureINFOID:0000000001547354
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.CHECK INTAKE SENSOR CIRCUIT
Refer to HAC-253, "
Intake Sensor Diagnosis Procedure".
Is the inspection result normal
YES >> GO TO 2.
NO >> Malfunctioning intake sensor: Refer to XX.
2.PERFORM AUTO ACTIVE TEST
Refer to XX.
Does the magnet clutch operate?
YES >>  WITH CONSULT-III
GO TO 6.
 WITHOUT CONSULT-III
GO TO 7.
NO >> GO TO 3.
3.CHECK POWER SUPPLY FOR MAGNET CLUTCH
AWIIA0342GB

HAC-240
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
MAGNET CLUTCH
1. Turn ignition switch OFF.
2. Disconnect A/C compressor connector.
3. Start the engine.
4. Press AUTO switch and A/C switch ON.
5. Check voltage between A/C compressor harness connector F3
terminal 1 and ground.
Is the inspection result normal
YES >> Replace A/C compressor. Refer to XX.
NO >> Check 10A fuse (No. 42), located in the IPDM ER.
 If fuse is OK, GO TO 4.
 If fuse is NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
4.CHECK MAGNET CLUTCH
Check for operation sound when applying battery voltage direct cur-
rent to terminal.
Is the inspection result normal?
OK >> GO TO 5.
NO >> Replace A/C compressor. Refer to XX.
5.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.
Is the inspection result normal
YES >> Replace IPDM E/R. Refer to XX.
NO >> Repair harness or connector.
6.CHECK BCM INPUT (A/C COMPRESSOR ON) SIGNAL
Check A/C compressor ON/OFF signal. Refer to HAC-212, "
CONSULT-III Function (BCM)".
Is the inspection result normal
YES >> GO TO 9.
NO >> GO TO 7.
7.CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND BCM.
Te r m i n a l s
Voltag e
(Approx.) (+) (−)
Connector Terminal
Ground
Compressor: F3 1 12V
SJIA0743E
RJIA2005E
ABContinuity
Connector Terminal Connector Terminal
Ye s
Compressor: F3 1IPDM E/R:
E4311
AWIIA0305ZZ
A/C SW ON : AIR COND SW ON
A/C SW OFF : AIR COND SW OFF

MAGNET CLUTCH
HAC-241
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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1. Turn ignition switch OFF.
2. Disconnect front air control connector and BCM connector.
3. Check continuity between front air control harness connector
M85 (A) terminal 23 and BCM harness connector M19 (B) termi-
nal 61.
4. Check continuity between front air control harness connector
M85 (A) terminal 23 and ground.
Is the inspection result normal
YES >> GO TO 8.
NO >> Repair harness or connector.
8.CHECK VOLTAGE FOR FRONT AIR CONTROL (A/C COMPRESSOR ON SIGNAL)
1. Reconnect front air control connector and BCM connector.
2. Turn ignition switch ON.
3. Confirm A/C compressor ON signal between front air control
harness connector M85 terminal 23 and ground using oscillo-
scope.
Is the inspection result normal
YES >> GO TO 9.
NO >> Replace front air control. Refer to XXXX.
9.CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-III
1. Start the engine.
2. Check the voltage of refrigerant pressure sensor.
WITHOUT CONSULT-III
AB
Continuity
Connector Terminal Connector Terminal
Front air control:
M8523 BCM: M19 61 Yes
A
GroundContinuity
Connector Terminal
Front air control:
M8523 No
AWIIA0561ZZ
Te r m i n a l s
ConditionVo l ta g e
(Approx.) (+)
(-)
connector Terminal
Front air
control:
M8523 GroundA/C switch:
ON
(Blower mo-
tor operates.)
SJIA0890E
ZJIA0584J

HAC-242
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
MAGNET CLUTCH
1. Start the engine.
2. Check voltage between ECM harness connector F11 and
ground.
Is the inspection result normal
YES >>  WITH CONSULT-III
GO TO 10.
 WITHOUT CONSULT-III
GO TO 11.
NO >> Refer to XX-XX, "*****"
(HR16DE W/EURO-OBD), XX-XX, "*****" (HR16DE W/O EURO-OBD),
EC-988, "
Component Function Check" (MR18DE W/EURO-OBD), XX-XX, "*****" (MR18DE W/O
DURO-OBD) or EC-1166, "
Diagnosis Procedure" (K9K).
10.CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to HAC-212, "
CONSULT-III Function (BCM)".
Is the inspection result normal
YES >> GO TO 13.
NO >> GO TO 11.
11 .CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND BCM
1. Turn ignition switch OFF.
2. Disconnect front air control connector and BCM connector.
3. Check continuity between front air control harness connector
M85 (A) terminal 22 and BCM harness connector M19 (B) termi-
nal 61.
4. Check continuity between front air control harness connector
M85 (A) terminal 22 and ground.
Is the inspection result normal
YES >> GO TO 12.
NO >> Repair harness or connector.
12.CHECK VOLTAGE FOR FRONT AIR CONTROL (FAN ON SIGNAL)
Te r m i n a l s
ConditionVol tag e
(Approx.) (+)
(-)
Connector Terminal
ECM: F1141 without
dieselGroundA/C switch: ON
(Blower motor
operates.)1-4V
78 with diesel
AWIIA0562ZZ
FAN SW ON : FAN ON SIG ON
FAN SW OFF : FAN ON SIG OFF
AB
Continuity
Connector Terminal Connector Terminal
Front air control:
M8522 BCM: M19 50 Yes
A
GroundContinuity
Connector Terminal
Front air control:
M8522 No
AWIIA0563ZZ

MAGNET CLUTCH
HAC-243
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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1. Reconnect front air control connector and BCM connector.
2. Turn ignition switch ON.
3. Confirm fan ON signal between front air control harness connec-
tor M85 terminal 22 and ground using oscilloscope.
Is the inspection result normal
YES >> Replace front air control. Refer to XXXX.
NO >> Replace BCM. Refer to XXXX.
13.CHECK CAN COMMUNICATION
Check CAN communication. Refer to LAN-22, "
Trouble Diagnosis Flow Chart"
BCM – ECM
 ECM – IPDM E/R
Is the inspection result normal
YES >> INSPECTION END
NO >> Repair or replace malfunction part(s).
Te r m i n a l s
Condition Output waveform (+) (−)
Connec-
torTe r m i n a l
Ground
Front air
control:
M8522blower
speed: 1st
SJIA0892E
ZJIA0583J

HAC-244
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
AMBIENT SENSOR
AMBIENT SENSOR
Component DescriptionINFOID:0000000001547357
COMPONENT DESCRIPTION
Ambient Sensor
The ambient sensor is attached on the radiator core support upper. It
detects ambient temperature and converts it into a resistance value
which is then input into the front air control
AMBIENT TEMPERATURE INPUT PROCESS
The front air control includes a processing circuit for the ambient sensor input. However, when the tempera-
ture detected by the ambient sensor increases quickly, the processing circuit retards the front air control func-
tion. It only allows the front air control to recognize an ambient temperature increase of 0.33°C (0.6°F) per 100
seconds.
As an example, consider stopping for a few minutes after high speed driving. Although the actual ambient tem-
perature has not changed, the temperature detected by the ambient sensor will increase. This is because the
heat from the engine compartment can radiate to the front grille area, location of the ambient sensor.
Ambient Sensor Diagnosis ProcedureINFOID:0000000001547358
DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR
SYMPTOM: Ambient sensor circuit is open or shorted.
LEDs of intake switch (FRE, REC) does not illuminate as a result of
performing self-diagnosis STEP-2.
1.CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND
1. Turn ignition switch OFF.
2. Disconnect ambient sensor connector.
3. Turn ignition switch ON.
4. Check voltage between ambient sensor harness connector E60
terminal 2 and ground.
Is the inspection result normal
YES >> GO TO 2.
AWIIA0600ZZ
AWIIA0345GB
Te r m i n a l s
Vo l ta g e
(Approx.) (+) (−)
Connector Terminal
Ground
Ambient sensor:
E6025V
AWIIA0307ZZ

AMBIENT SENSOR
HAC-245
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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NO >> GO TO 4.
2.CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between ambient sensor harness connector
E60 (A) terminal 1 and front air control harness connector M85
(B) terminal 3.
Is the inspection result normal
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK AMBIENT SENSOR
Refer to HAC-245, "
Ambient Sensor Component Inspection"
Is the inspection result normal
YES >> 1. Replace front air control. Refer to XXXX
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis.
NO >> 1. Replace ambient sensor.
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis.
4.CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between ambient sensor harness connector
E60 (A) terminal 1 and front air control harness connector M85
(B) terminal.
4. Check continuity between ambient sensor harness connector
(A) and ground.
Is the inspection result normal
YES >> 1. Replace front air control. Refer to XXXX.
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis-.
NO >> Repair harness or connector.
Ambient Sensor Component InspectionINFOID:0000000001547359
COMPONENT INSPECTION
Ambient Sensor
AB
Continuity
Connector Terminal Connector Terminal
Ambient sensor:
E601Front air control:
M8610 Yes
AWIIA0558ZZ
AB
Continuity
Connector Terminal Connector Terminal
Ambient sensor:
E602Front air control:
M863Yes
A
GroundContinuity
Connector Terminal
Ambient sensor:
E602No
AWIIA0559ZZ

HAC-246
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
AMBIENT SENSOR
After disconnecting ambient sensor connector E60, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace ambient sensor. Refer to XXXX.
Temperature °C (°F) Resistance kΩ
−15 (5) 12.73
−10 (14) 9.92
−5 (23) 7.80
0 (32) 6.19
5 (41) 4.95
10 (50) 3.99
15 (59) 3.24
20 (68) 2.65
25 (77) 2.19
30 (86) 1.81
35 (95) 1.51
40 (104) 1.27
45 (113) 1.07
AWIIA0603ZZ

IN-VEHICLE SENSOR
HAC-247
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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IN-VEHICLE SENSOR
Component DescriptionINFOID:0000000001547360
COMPONENT DESCRIPTION
In-vehicle Sensor
The in-vehicle sensor (1) is located on instrument lower finisher. It
converts variations in temperature of compartment air drawn from
the aspirator into a resistance value. It is then input into the front air
control.
Aspirator
The aspirator (1) is located on passenger’s side of A/C unit. It pro-
duces vacuum pressure due to air discharged from the A/C unit,
continuously taking compartment air in the aspirator.
In-Vehicle Sensor Diagnosis ProcedureINFOID:0000000001547361
DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR
SYMPTOM: In-vehicle sensor circuit is open or shorted.
LEDs of intake switch (FRE, REC) does not illuminate as a result of
performing self-diagnosis STEP-2.
SJIA0844E
SJIA0845E
RJIA1402E
AWIIA0346GB