2007 NISSAN TIIDA front

IN-VEHICLE SENSOR
HAC-135
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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Is the inspection result normal?
YES >> 1. Replace front air control. Refer to XX.
2. Go to self-diagnosis HAC-98, "
Front Air Control Self-Diagnosis" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NO >> Repair harness or connector.
In-Vehicle Sensor Component InspectionINFOID:0000000001547440
COMPONENT INSPECTION
In-vehicle Sensor
After disconnecting in-vehicle sensor connector M93, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace in-vehicle sensor Refer to XX.
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-136
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
SUNLOAD SENSOR
SUNLOAD SENSOR
System DescriptionINFOID:0000000001547443
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:0000000001547442
DIAGNOSTIC PROCEDURE FOR SUNLOAD SENSOR
SYMPTOM: Sunload sensor circuit is open or shorted. (25 or AUTO25
is indicated on front air control as a result of performing self-diagno-
sis STEP-2.)
1.CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND
1. Turn ignition switch OFF.
2. Disconnect sunload sensor connector M94.
3. Turn ignition switch ON.
4. Check voltage between sunload sensor harness connector M94
terminal 1 and ground.
Is the inspection result normal?
SJIA0819E
AWIIA0312GB
Te r m i n a l s
Voltag e
(Approx.) (+) (−)
Connector Terminal
Ground
Sunload sensor: M94 1 5V
SJIA0821E

SUNLOAD SENSOR
HAC-137
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O 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 M51.
3. Check continuity between sunload sensor harness connector
M94 (A) terminal 2 and front air control harness connector M51
(B) terminal 33.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK SUNLOAD SENSOR
Refer to HAC-137, "
Sunload Component Inspection".
Is the inspection result normal?
YES >> 1. Replace front air control. Refer to XX.
2. Go to self-diagnosis HAC-98, "
Front Air Control Self-Diagnosis" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NO >> 1. Replace sunload sensor. Refer to XX.
2. Go to self-diagnosis HAC-98, "
Front Air Control Self-Diagnosis" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
4.CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector M51.
3. Check continuity between sunload sensor harness connector
M94 (B) terminal 1 and front air control harness connector M51
(B) terminal 31.
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 XX.
2. Go to self-diagnosis HAC-98, "
Front Air Control Self-Diagnosis" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NO >> Repair harness or connector.
Sunload Component InspectionINFOID:0000000001569485
COMPONENT INSPECTION
Sunload Sensor
AB
Continuity
Connector Terminal Connector Terminal
Sunload sensor: M94 2Front air con-
trol: M5133 Yes
SJIA0822E
AB
Continuity
Connector Terminal Connector Terminal
Sunload sensor: M94 1Front air con-
trol: M5131 Yes
A
GroundContinuity
Connector Terminal
Sunload sensor: M94 1 No
SJIA0823E

HAC-138
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
SUNLOAD SENSOR
Measure voltage between front air control harness connector M51
terminal 31 and ground.
If NG, replace sunload sensor. Refer to XX.
 When checking sunload sensor, select a place where sun shines directly on it.
SJIA0847E
SHA930E

INTAKE SENSOR
HAC-139
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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INTAKE SENSOR
Component InspectionINFOID:0000000001572418
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:0000000001547444
DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake sensor circuit is open or shorted. (24 or AUTO24 is
indicated on front air control 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 M92.
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
AWIIA0313GB
Te r m i n a l s
Voltag e
(Approx.) (+) (−)
Connector Terminal
Ground
Intake sensor: M92 1 5V
SJIA0825E

HAC-140
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
INTAKE SENSOR
1. Turn ignition switch OFF.
2. Disconnect front air control connector M51.
3. Check continuity between intake sensor harness connector M92
(A) terminal 2 and front air control harness connector M51 (B)
terminal 33.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INTAKE SENSOR
Refer to HAC-140, "
Intake Sensor Component Inspection".
Is the inspection result normal?
YES >> 1. Replace front air control. Refer to XX.
2. Go to self-diagnosis HAC-98, "
Front Air Control Self-Diagnosis" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NO >> 1. Replace intake sensor. Refer to XX.
2. Go to self-diagnosis HAC-98, "
Front Air Control Self-Diagnosis" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
4.CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector M51.
3. Check continuity between intake sensor harness connector M92
(A) terminal 1 and front air control harness connector M51 (B)
terminal 29.
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 XX.
2. Go to self-diagnosis HAC-98, "
Front Air Control Self-Diagnosis" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NO >> Repair harness or connector.
Intake Sensor Component InspectionINFOID:0000000001547445
COMPONENT INSPECTION
Intake Sensor
AB
Continuity
Connector Terminal Connector Terminal
Intake sensor: M92 2Front air con-
trol: M5133 Yes
SJIA0826E
AB
Continuity
Connector Terminal Connector Terminal
Intake sensor: M92 1Front air control:
M5129 Yes
A
GroundContinuity
Connector Terminal
Intake sensor: M92 1 No
SJIA0827E

HAC-144
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
PTC HEATER CONTROL SYSTEM
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.
PTC HEATER (300 WATT) : PTC Heater (300 Watt) Diagnosis ProcedureINFOID:0000000001682708
DIAGNOSTIC PROCEDURE FOR PTC SYSTEM
SYMPTOM: PTC heater system operation is malfunction.
1.CHECK POWER SUPPLY FOR PTC RELAY-1
1. Turn ignition switch ON.
2. Check voltage between PTC relay-1 harness connector E61 ter-
minals 2, 3, and ground.
Is the inspection result normal
YES >> GO TO 2.
NO >> Check power supply circuit and 10A fuse (No. 2) and 40A fusible link (No. I), located in the fuse
and fusible link box.
 If fuses are OK, check harness for open circuit. Repair or replace if necessary.
 If fuses are NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
2.CHECK PTC RELAY-1
1. Turn ignition switch OFF.
2. Check PTC relay-1. Refer to HAC-151, "
PTC HEATER (300 WATT) : PTC Heater (300 Watt) Component
Inspection".
Is the inspection result normal
YES >> GO TO 3.
NO >> Replace PTC relay-1. Refer to XX.
3.CHECK PTC RELAY-1 OUTPUT CIRCUIT
1. Disconnect ambient sensor, PTC heater and water temperature
sensor connectors.
2. Turn temperature control dial clockwise until full hot position.
3. Turn mode control dial to foot position.
4. Start the engine.
5. Turn blower control dial to maximum speed.
6. Check continuity between PTC relay-1 harness connector E61
terminal 1 and ground.
Is the inspection result normal
YES >> GO TO 5.
AWIIA0600ZZ
Te r m i n a l s
Voltag e
(Approx.)
(+) (−)
Connector Terminal
Ground Battery voltage
PTC relay-1: E612
3
SJIA0913E
Connector Terminal
GroundContinuity
PTC relay-1: E61 1 Yes
AWIIA0455ZZ

HAC-148
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
PTC HEATER CONTROL SYSTEM
Check continuity between water temperature sensor harness con-
nector M64 (A) terminal 2 and PTC control unit harness connector
M84 (B) terminal 8.
Is the inspection result normal
YES >> GO TO 16.
NO >> Repair harness or connector.
16.CHECK VOLTAGE BETWEEN PTC CONTROL UNIT AND GROUND
1. Turn ignition switch ON.
2. Check voltage between PTC heater harness connector M84 ter-
minal 10 and ground.
Is the inspection result normal
YES >> 1. If equipped with manual transmission, GO TO 22.
2. If equipped with automatic transmission, GO TO 24.
NO >> GO TO 17.
17.CHECK CIRCUIT CONTINUITY BETWEEN PTC CONTROL UNIT AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control and PTC control unit connector.
3. Check continuity between PTC control unit harness connector
M84 (A) terminal 10 and front air control harness connector M85
(B) terminal 9.
4. Check continuity between PTC control unit harness connector
M84 (A) terminal 10 and ground.
Is the inspection result normal
YES >> GO TO 18.
NO >> Repair harness or connector.
18.CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND
AB
Continuity
Connector Terminal Connector Terminal
Water temperature
sensor: M642PTC control unit:
M848Yes
SJIA0923E
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Vo l ta g e
(Approx.)
(+) (−)
Connector Terminal
Ground 5V
PTC control unit: M84 10
AWIIA0521ZZ
AB
Continuity
Connector Terminal Connector Terminal
PTC control unit: M84 10Front air control:
M859Yes
A
GroundContinuity
Connector Terminal
PTC control unit: M84 10 No
AWIIA0525ZZ