NISSAN TIIDA 2007 Service Repair Manual

HAC-248
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
IN-VEHICLE SENSOR
1.CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND
1. Turn ignition switch OFF.
2. Disconnect in-vehicle sensor connector.
3. Turn ignition switch ON.
4. Check voltage between in-vehicle sensor harness connector
and ground.
Is the inspection result normal
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between in-vehicle sensor harness connector
M93 (A) terminal 2 and front air control harness connector M85
(B) terminal 10.
Is the inspection result normal
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK IN-VEHICLE SENSOR
Refer to HAC-249, "
In-Vehicle 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 in-vehicle sensor.
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis.
4.CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between in-vehicle sensor harness connector
M41 (A) terminal 1 and front air control harness connector M85
(B) terminal 4.
4. Check continuity between in-vehicle sensor harness connector
M93 (A) terminal 1 and ground.
Te r m i n a l s
Vo l ta g e
(Approx.) (+) (−)
Connector Terminal
Ground
In-vehicle sensor:
M9315V
SJIA0816E
AB
Continuity
Connector Terminal Connector Terminal
In-vehicle sensor:
M932Front air con-
trol: M8510 Yes
SJIA0896E
AB
Continuity
Connector Terminal Connector Terminal
In-vehicle sensor:
M931Front air con-
trol: M854Yes
SJIA0898E

IN-VEHICLE SENSOR
HAC-249
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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Is the inspection result normal
YES >> 1. Replace front air control.
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis.
NO >> Repair harness or connector.
In-Vehicle Sensor Component InspectionINFOID:0000000001547362
COMPONENT INSPECTION
In-vehicle Sensor
After disconnecting in-vehicle sensor connector M41, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace in-vehicle sensor. Refer to XXXX
A
GroundContinuity
Connector Terminal
In-vehicle sensor:
M931No
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
SJIA0846E

HAC-250
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
SUNLOAD SENSOR
SUNLOAD SENSOR
Component DescriptionINFOID:0000000001547363
COMPONENT DESCRIPTION
Sunload Sensor
The sunload sensor (1) is located on the instrument upper mask. It
detects sunload entering through windshield by means of a photo
diode. The sensor converts the sunload into a current value which is
then input into the front air control.
SUNLOAD INPUT PROCESS
The front air control also includes a processing circuit which averages the variations in detected sunload over
a period of time. This prevents drastic swings in the ATC system operation due to small or quick variations in
detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the sunload sensor will vary whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the ATC system operation. On the other hand, shortly
after entering a long tunnel, the system will recognize the change in sunload, and the system will react accord-
ingly.
Sunload Sensor Diagnosis ProcedureINFOID:0000000001547364
DIAGNOSTIC PROCEDURE FOR SUNLOAD SENSOR
SYMPTOM: Sunload 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 SUNLOAD SENSOR AND GROUND
1. Turn ignition switch OFF.
2. Disconnect sunload sensor connector.
3. Turn ignition switch ON.
4. Check voltage between sunload sensor harness connector M94
terminal 1 and ground.
Is the inspection result normal
SJIA0819E
AWIIA0347GB
Te r m i n a l s
Voltag e
(Approx.) (+) (−)
Connector Terminal
Ground
Sunload sensor: M94 1 5V
SJIA0821E

SUNLOAD SENSOR
HAC-251
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between sunload sensor harness connector
M94 (A) terminal 2 and front air control harness connector M86
(B) terminal 10.
Is the inspection result normal
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK SUNLOAD SENSOR
Refer to HAC-251, "
Sunload Sensor Component Inspection".
Is the inspection result normal
YES >> 1. Replace front air control. Refer to XX.
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis.
NO >> 1. Replace sunload sensor.
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis.
4.CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between sunload sensor harness connector
M94 (B) terminal 1 and front air control harness connector M86
(B) terminal 5.
4. Check continuity between sunload sensor harness connector
M94 (A) terminal 1 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.
Sunload Sensor Component InspectionINFOID:0000000001555023
COMPONENT INSPECTION
Sunload Sensor
AB
Continuity
Connector Terminal Connector Terminal
Sunload sensor: M94 2Front air control:
M8610 Yes
SJIA0900E
AB
Continuity
Connector Terminal Connector Terminal
Sunload sensor: M94 1Front air control:
M865Yes
A
GroundContinuity
Connector Terminal
Sunload sensor: M94 1 No
SJIA0901E

HAC-252
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
SUNLOAD SENSOR
Measure voltage between front air control harness connector M86
terminal 5 and ground.
If NG, replace sunload sensor. Refer to XXXX
 When checking sunload sensor, select a place where sun shines directly on it.
SJIA0995E
SHA930E

INTAKE SENSOR
HAC-253
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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INTAKE SENSOR
System DescriptionINFOID:0000000001547365
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor (1) is located on the A/C unit. It converts tempera-
ture of air after it passes through the evaporator (2) into a resistance
value which is then input to the front air control.
Intake Sensor Diagnosis ProcedureINFOID:0000000001547366
DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake 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 INTAKE SENSOR AND GROUND
1. Turn ignition switch OFF.
2. Disconnect intake sensor connector.
3. Turn ignition switch ON.
4. Check voltage between intake sensor harness connector M92
terminal 1 and ground.
Is the inspection result normal
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
ZJIA0798J
AWIIA0348GB
Te r m i n a l s
Voltag e
(Approx.) (+) (−)
Connector Terminal
Ground
Intake sensor: M92 1 5V
SJIA0825E

HAC-254
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
INTAKE SENSOR
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between intake sensor harness connector M92
(A) terminal 2 and front air control harness connector M86 (B)
terminal 10.
Is the inspection result normal
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INTAKE SENSOR
Refer to HAC-254, "
Intake 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 intake sensor. Refer to XXXX
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis.
4.CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between intake sensor harness connector M92
(A) terminal 1 and front air control harness connector M86 (B)
terminal 6.
4. Check continuity between intake sensor harness connector M92
(A) terminal 1 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.
Intake Sensor Component InspectionINFOID:0000000001547367
COMPONENT INSPECTION
Intake Sensor
AB
Continuity
Connector Terminal Connector Terminal
Intake sensor: M92 2Front air control:
M8610 Yes
SJIA0903E
AB
Continuity
Connector Terminal Connector Terminal
Intake sensor: M92 1Front air control:
M866Yes
A
GroundContinuity
Connector Terminal
Intake sensor: M92 1 No
SJIA0904E

INTAKE SENSOR
HAC-255
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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After disconnecting intake sensor connector M42, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace intake sensor. Refer to XXXX
Temperature °C (°F) Resistance kΩ
−15 (5) 12.34
−10 (14) 9.62
−5 (23) 7.56
0 (32) 6.00
5 (41) 4.80
10 (50) 3.87
15 (59) 3.15
20 (68) 2.57
25 (77) 2.12
30 (86) 1.76
35 (95) 1.47
40 (104) 1.23
45 (113) 1.04
SJIA0828E

HAC-256
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
PTC HEATER CONTROL SYSTEM
PTC HEATER (300 WATT)
PTC HEATER (300 WATT) : PTC Heater System DescriptionINFOID:0000000001548105
SYSTEM DESCRIPTION
The PTC heater system is controlled by ambient temperature, water temperature, FAN ON signal and temper-
ature control dial. Hot air is supplied to the discharge air outlets by a PTC heater that generates heat electri-
cally even when engine coolant temperature is low.
Component Parts
PTC heater system components are:
 PTC control unit
 PTC heater
 PTC relay-1
 Water temperature sensor
 Full hot switch
 Ambient sensor
System Operation
PTC heater system starts when all the following conditions are met:
 Less than 35 minutes after ignition switch ON.
 Blower control dial ON (Blower motor operates.) and temperature control dial full hot position (Full hot switch
ON).
 Ambient temperature is lower than 0°C (32°).
 Engine coolant temperature is lower than 65°C (149°) (condition
1), or when it becomes lower than 60°C (140°) again (condition 2)
on startup.
 Engine speed is more than 1100 rpm and after a lapse of more
than 10 seconds.
PTC heater system stops when any of the following conditions is
met:
 More than 35 minutes later after ignition switch ON.
 Blower control dial OFF (Blower motor OFF) and/or temperature
control dial except full hot position (Full hot switch OFF).
 Ambient temperature is higher than 0°C (32°).
 Engine coolant temperature is higher than 65°C (149°).
 When engine speed becomes less than 800 rpm.
SJIA0968E
AWIIA0343GB

PTC HEATER CONTROL SYSTEM
HAC-257
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
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PTC HEATER (300 WATT) : PTC Heater Component DescriptionINFOID:0000000001548106
COMPONENT DESCRIPTION
PTC Control Unit
The PTC control unit is attached on the A/C unit assembly. It controls
PTC heater by ambient temperature, water temperature, FAN ON
signal and temperature control dial.
PTC Heater
The PTC heater is attached on the A/C unit assembly. It generates
heat electrically.
Water Temperature Sensor
The water temperature sensor is attached on heater pipe. It detects
water temperature and converts it into a resistance value which is
then input in to PTC control unit.
Full Hot Switch
The full hot switch is attached on the A/C unit assembly. When the
temperature control dial at full hot position, then full hot switch is
turned ON.
Ambient Sensor
SJIA0906E
SJIA0907E
SJIA0908E
SJIA0909E