2007 NISSAN TIIDA Service Repair Manual

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Page 3489 of 5883

NISSAN TIIDA 2007 Service Repair Manual HAC-156
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
PTC HEATER CONTROL SYSTEM
2.CHECK BLOWER RELAY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between blower relay ha

Page 3490 of 5883

NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
HAC-157
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
C
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6.CHECK POWER SUPPLY FOR PTC RELAY-3
Check voltage between PTC relay-3 harne

Page 3491 of 5883

NISSAN TIIDA 2007 Service Repair Manual HAC-158
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
PTC HEATER CONTROL SYSTEM
Check continuity between PTC relay-2 harness connector E62 termi-
nal 1 and ground.
Is the inspection result

Page 3492 of 5883

NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
HAC-159
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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1. Turn ignition switch OFF.
2. Reconnect BCM connector.
3. Disconnect ambie

Page 3493 of 5883

NISSAN TIIDA 2007 Service Repair Manual HAC-160
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
PTC HEATER CONTROL SYSTEM
Refer to XX-XX, "*****".
Is the inspection result normal?
YES >> GO TO 18.
NO >> Replace ambient temperature

Page 3494 of 5883

NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
HAC-161
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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Check continuity between relay terminals 3 and 5.
If NG, replace the blower

Page 3495 of 5883

NISSAN TIIDA 2007 Service Repair Manual HAC-162
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
PTC HEATER CONTROL SYSTEM
If NG, replace ambient sensor. Refer to XX.

Page 3496 of 5883

NISSAN TIIDA 2007 Service Repair Manual POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
HAC-163
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
C
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HAC
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POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
Componen

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
HAC-163
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
C
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HAC
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POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
Component DescriptionINFOID:0000000001547446
COMPONENT DESCRIPTION
Front Air Control
The front air control has a built-in microcomputer which processes information sent from various sensors
needed for air conditioner operation. The air mix door motor, mode door motor, intake door motor, blower
motor and compressor are then controlled.
The front air control is unitized with control mechanisms. Signal from various switches and Potentio Tempera-
ture Control (PTC) are directly entered into front air control.
Self-diagnostic functions are also built into front air control to provide quick check of malfunctions in the auto
air conditioner system.
Potentio Temperature Control (PTC)
The PTC is built into the front air control. It can be set at an interval of 1°C (34°F) in the 18°C (64°F) to 32°C
(90°F) temperature range by turning temperature control switch. The set temperature is displayed.
Front Air Control Component Function CheckINFOID:0000000001547447
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - AUTO MODE
1. Press the AUTO switch and A/C switch.
2. Display should indicate AUTO. 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 a symptom be duplicated?
YES >> GO TO 2.
NO >> Perform a complete operational check. Refer to HAC-87, "
Operational Check".
2.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.CHECK POWER AND GROUND CIRCUIT
Check main power supply and ground circuit. Refer to HAC-163, "
Front Air Control Power and Ground Diag-
nosis Procedure".
Is the inspection result normal?
YES >> System OK.
NO >> Replace Front air control. Refer to XX.
Front Air Control Power and Ground Diagnosis ProcedureINFOID:0000000001547448
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
AWIIA0289GB

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