Nissan Tiida C11. Instruction — part 842
HAC-32
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE SENSOR
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 k
Ω
−
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
PTC HEATER CONTROL SYSTEM
HAC-33
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
PTC HEATER CONTROL SYSTEM
PTC HEATER (300 WATT)
PTC HEATER (300 WATT) : PTC Heater System Description
INFOID:0000000001674171
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 a discharge air outlet by PTC heater that generates heat electrically
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
°
F).
• Engine coolant temperature is lower than 65
°
C (149
°
F) (condition
1), or when it becomes lower than 60
°
C (140
°
F) 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
°
F).
• Engine coolant temperature is higher than 65
°
C (149
°
F).
• When engine speed becomes less than 800 rpm.
SJIA0968E
AWIIA0354GB
HAC-34
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
PTC HEATER CONTROL SYSTEM
PTC HEATER (300 WATT) : PTC Heater Component Description
INFOID:0000000001674172
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.
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 PTC control unit.
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
SJIA0906E
SJIA0907E
AWIIA0600ZZ
SJIA0908E
PTC HEATER CONTROL SYSTEM
HAC-35
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
The full hot switch is attached on the A/C unit assembly. When the
temperature control dial at full hot position, and then full hot switch
turned ON.
PTC HEATER (300 WATT) : PTC Heater (300 Watt) Diagnosis Procedure
INFOID:0000000001674173
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 and 40A fusible link (No. 2 and I, located in the fuse
block). Refer to XX.
• 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-41, "PTC HEATER (300 WATT) : PTC Heater (300 Watt) Component
.
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 resistance between PTC relay-1 harness connector E61
terminal 1 and ground.
Is the inspection result normal
YES
>> GO TO 5.
SJIA0909E
Terminals
Voltage
(Approx.)
(+)
(
−
)
Connector
Terminal
Ground
Battery voltage
PTC relay-1: E61
2
3
SJIA0913E
Connector
Terminal
Ground
Continuity
PTC relay-1: E61
1
Yes
AWIIA0455ZZ
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст