Nissan Tiida C11. Instruction — part 874
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 sensor. Refer to XX.
18.
CHECK PTC HEATER RELAY-1 POWER SUPPLY CIRCUIT
1.
Disconnect PTC heater connector.
2.
Reconnect all PTC relays.
3.
Start the engine (1,000 RPM minimum).
4.
Check voltage between PTC heater harness connector E65 ter-
minal 3 and ground.
Is the inspection result normal?
YES
>> GO TO 19.
NO
>> Repair harness or connector.
19.
CHECK PTC HEATER RELAY-2 POWER SUPPLY CIRCUIT
Check voltage between PTC heater harness connector E65 terminal
2 and ground.
Is the inspection result normal
YES
>> GO TO 20.
NO
>> Repair harness or connector.
20.
CHECK PTC HEATER RELAY-3 POWER SUPPLY CIRCUIT
Check voltage between PTC heater harness connector E65 terminal
1 and ground.
Is the inspection result normal
YES
>> Replace PTC heater. Refer to XXXX.
NO
>> Repair harness or connector.
PTC HEATER (1500 WATT) : PTC Heater (1500 Watt) Component Inspection
INFOID:0000000001682726
COMPONENT INSPECTION
Blower Relay
Terminals
Voltage
(Approx.)
(+)
(
−
)
Connector
Terminal
Ground
PTC heater: E65
3
Battery voltage
AWIIA0472ZZ
Terminals
Voltage
(Approx.)
(+)
(
−
)
Connector
Terminal
Ground
PTC heater: E65
2
Battery voltage
AWIIA0474ZZ
Terminals
Voltage
(Approx.)
(+)
(
−
)
Connector
Terminal
Ground
PTC heater: E65
1
Battery voltage
AWIIA0476ZZ
PTC HEATER CONTROL SYSTEM
HAC-161
< COMPONENT DIAGNOSIS >
[AUTO AIR CONDITIONER (W/O NAVI)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Check continuity between relay terminals 3 and 5.
If NG, replace the blower relay. Refer to XX.
PTC relay
Check continuity between terminal Nos. 3 and 5.
If NG, replace PTC relay. Refer to XX.
Ambient Sensor
After disconnecting ambient sensor connector E60, measure resis-
tance between terminals 3 and 4 at sensor side, using the table
below.
Condition
Continuity
12V direct current supply between terminals 1 and 2
Yes
OFF
No
SCIA1245E
Condition
Continuity
12V direct current supply between terminal Nos. 1 and 2
Yes
No current supply
No
SJIA0931E
Temperature
°
C (
°
F)
Resistance k
Ω
−
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
AWIIA0601ZZ
HAC-162
< COMPONENT DIAGNOSIS >
[AUTO AIR CONDITIONER (W/O NAVI)]
PTC HEATER CONTROL SYSTEM
If NG, replace ambient sensor. Refer to XX.
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
HAC-163
< COMPONENT DIAGNOSIS >
[AUTO AIR CONDITIONER (W/O NAVI)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
Component Description
INFOID: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 Check
INFOID: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
.
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-
.
Is the inspection result normal?
YES
>> System OK.
NO
>> Replace Front air control. Refer to XX.
Front Air Control Power and Ground Diagnosis Procedure
INFOID:0000000001547448
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
AWIIA0289GB
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