Page 3585 of 5883
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
Page 3586 of 5883
![NISSAN TIIDA 2007 Service Repair Manual INTAKE SENSOR
HAC-253
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INTAKE SENSOR
System DescriptionINFOID:0000000001547365
COMPONENT DESCRIPTION
Intake Senso NISSAN TIIDA 2007 Service Repair Manual INTAKE SENSOR
HAC-253
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INTAKE SENSOR
System DescriptionINFOID:0000000001547365
COMPONENT DESCRIPTION
Intake Senso](/manual-img/5/57395/w960_57395-3585.png)
INTAKE SENSOR
HAC-253
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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
Page 3587 of 5883
![NISSAN TIIDA 2007 Service Repair Manual 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 c NISSAN TIIDA 2007 Service Repair Manual 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 c](/manual-img/5/57395/w960_57395-3586.png)
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
Page 3588 of 5883
INTAKE SENSOR
HAC-255
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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
Page 3589 of 5883
![NISSAN TIIDA 2007 Service Repair Manual 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:000 NISSAN TIIDA 2007 Service Repair Manual 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:000](/manual-img/5/57395/w960_57395-3588.png)
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.
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Page 3590 of 5883
PTC HEATER CONTROL SYSTEM
HAC-257
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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
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Page 3591 of 5883
![NISSAN TIIDA 2007 Service Repair Manual HAC-258
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
The ambient sensor is attached on the radiator core support upper. It
detects ambient temperature and converts NISSAN TIIDA 2007 Service Repair Manual HAC-258
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
The ambient sensor is attached on the radiator core support upper. It
detects ambient temperature and converts](/manual-img/5/57395/w960_57395-3590.png)
HAC-258
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/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:0000000001548107
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-265, "
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
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Voltag e
(Approx.)
(+) (−)
Connector Terminal
Ground Battery voltage
PTC relay-1: E612
3
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GroundContinuity
PTC relay-1: E61 1 Yes
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Page 3592 of 5883
![NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
HAC-259
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NO >> GO TO 4.
4.CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-1 AND PTC CONTROL NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
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NO >> GO TO 4.
4.CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-1 AND PTC CONTROL](/manual-img/5/57395/w960_57395-3591.png)
PTC HEATER CONTROL SYSTEM
HAC-259
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NO >> GO TO 4.
4.CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-1 AND PTC CONTROL UNIT
1. Turn ignition switch OFF.
2. Disconnect PTC control unit connector.
3. Check continuity between PTC control unit harness connector
M84 (A) terminal 2 and PTC relay-1 harness connector E61 (B)
terminal 1.
Is the inspection result normal
YES >> GO TO 5.
NO >> GO TO 7.
5.CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-1 AND PTC HEATER
1. Disconnect PTC heater connector.
2. Check continuity between PTC relay-1 harness connector E61
(A) terminal 5 and PTC heater harness connector M66 (B) termi-
nal 1.
Is the inspection result normal
YES >> GO TO 6.
NO >> Repair harness or connector.
6.CHECK PTC HEATER GROUND CIRCUIT
Check continuity between PTC heater harness connector M66 termi-
nal 2 and ground.
Is the inspection result normal
YES >> Replace PTC heater. Refer to XX.
NO >> Repair harness or connector.
7.CHECK POWER SUPPLY VOLTAGE FOR PTC CONTROL UNIT
1. Turn ignition switch ON.
2. Check voltage between PTC control unit harness connector
M84 terminal 1 and ground.
Is the inspection result normal
YES >> GO TO 8.
AB
Continuity
Connector Terminal Connector Terminal
PTC control unit: M84 2PTC relay-1:
E611Yes
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AB
Continuity
Connector Terminal Connector Terminal
PTC relay-1:
E615 PTC heater: M66 1 Yes
SJIA0915E
Connector Terminal
GroundContinuity
PTC heater:
M662Yes
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Te r m i n a l s
Vo l ta g e
(Approx.)
(+) (−)
Connector Terminal
Ground Battery voltage
PTC control unit: M84 1
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