Nissan Tiida C11. Manual — part 839
HAC-20
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
BLOWER MOTOR
2.
CHECK POWER SUPPLY FOR FRONT BLOWER MOTOR
1.
Turn ignition switch OFF.
2.
Disconnect front blower motor connector.
3.
Turn ignition switch ON.
4.
Check voltage between front blower motor harness connector
M62 terminal 1 and ground.
OK or NG
OK
>> GO TO 6.
NG
>>
Check power supply circuit and 15A fuses [Nos. 15 and 17, located in the fuse block (J/B)].
• If fuses are OK, reinstall fuses and GO TO 3.
• If fuses are NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
3.
CHECK BLOWER MOTOR RELAY POWER SUPPLY CIRCUITS
1.
Turn ignition switch OFF.
2.
Disconnect blower motor relay connector.
3.
Turn ignition switch ON.
4.
Check voltage between blower motor relay harness connector J-
1 terminal 1, 5 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair harness or connector.
4.
CHECK BLOWER MOTOR RELAY (SWITCH SIDE) CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Check continuity between blower motor relay harness connector
J-1 (A) terminal 3 and front blower motor harness connector
M62 (B) terminal 1.
OK or NG
OK
>> GO TO 5.
NG
>> Repair harness or connector.
5.
CHECK BLOWER MOTOR RELAY GROUND CIRCUIT
Check continuity between blower motor relay harness connector J-1
terminal 2 and ground.
OK or NG
OK
>> Replace blower motor relay.
NG
>> Repair harness or connector.
Terminals
Voltage
(Approx.)
(+)
(
−
)
Connector
Terminal
Ground
Front blower
motor: M62
1
Battery voltage
WJIA2228E
1 - Ground
Battery voltage should exist.
5 - Ground
Battery voltage should exist.
WJIA1783E
Continuity should exist.
WJIA2263E
Continuity should exist.
WJIA2264E
BLOWER MOTOR
HAC-21
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
6.
CHECK FRONT BLOWER MOTOR
Check continuity between front blower motor terminals 1 and 2.
NOTE:
Ensure that there are no foreign particles inside the A/C unit assem-
bly for a smooth rotation of the front blower motor.
OK or NG
OK
>> GO TO 7.
NG
>> Replace front blower motor. Refer to
XX-XX, "*****"
.
7.
CHECK CIRCUIT CONTINUITY BETWEEN FRONT BLOWER MOTOR AND FRONT AIR CONTROL
1.
Disconnect front air control connector.
2.
Check continuity between front blower motor harness connector
M62 (A) terminal 2 and front air control harness connector M33
(B) terminal 13.
OK or NG
OK
>> GO TO 8.
NG
>> Repair harness or connector.
8.
CHECK FAN SWITCH
Check continuity between front air control terminal 9 and 10, 11, 12,
13, 14.
OK or NG
OK
>> GO TO 9.
NG
>> Replace front air control. Refer to
XX-XX, "*****"
.
9.
CHECK FAN SWITCH GROUND CIRCUIT
Check continuity between front air control harness connector M33
terminal 9 and ground.
OK or NG
OK
>> Inspection End.
NG
>> Repair harness or connector.
10.
CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND FRONT BLOWER MOTOR
RESISTOR
1 - 2
: Continuity should exist.
WJIA2230E
2 - 13
: Continuity should exist.
AWIIA0339ZZ
Terminals
Condition
Continuity
9
14
Blower control dial: OFF
Yes
10
Blower control dial: 1-speed
11
Blower control dial: 2-speed
12
Blower control dial: 3-speed
13
Blower control dial: 4-speed
SJIA0732E
Continuity should exist.
SJIA0734E
HAC-22
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
BLOWER MOTOR
1.
Turn ignition switch OFF.
2.
Disconnect front blower motor resistor and front air control con-
nectors.
3.
Check continuity between front air control harness connector
M33 (A) terminals and front blower motor resistor harness con-
nector M95 (B) terminals.
OK or NG
OK
>> GO TO 11.
NG
>> Repair harness or connector.
11.
CHECK FAN SWITCH
Check continuity between front air control terminal 9 and 10, 11, 12,
13, 14.
OK or NG
OK
>> Replace the front blower motor resistor. Refer to
XX-XX, "*****"
.
NG
>> Replace front air control. Refer to
XX-XX, "*****"
.
A
B
Continuity
Connector
Terminal
Connector
Terminal
Front air control:
M33
10
Front blower
motor resistor:
M95
1
Yes
11
2
12
3
13
4
SJIA0733E
Terminals
Condition
Continuity
9
14
Fan control dial: OFF
Yes
10
Fan control dial: 1-speed
11
Fan control dial: 2-speed
12
Fan control dial: 3-speed
13
Fan control dial: 4-speed
SJIA0732E
MAGNET CLUTCH
HAC-23
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
MAGNET CLUTCH
System Description
INFOID:0000000001547069
SYSTEM DESCRIPTION
Intake sensor controls A/C compressor operation by intake air temperature and signal from ECM.
The defrost A/C switch controls A/C compressor operation by the BCM when the mode switch is turned to the
(DEF) position.
Low Temperature Protection Control
When intake air temperatures are higher than 4
°
C (39
°
F), the com-
pressor turns ON. The compressor turns OFF when intake air tem-
peratures are lower than 2
°
C (36
°
F).
Magnet Clutch Component Function Check
INFOID:0000000001547070
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MAGNET CLUTCH
1.
Turn ignition switch ON.
2.
Turn blower control dial to the desired (1 to 4 speed) position.
3.
Press the A/C switch. A/C indicator will turn on.
4.
Confirm that the compressor clutch engages (sound or visual inspection).
Can the symptom be duplicated?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
Does another symptom exist?
YES
>> Refer to
HAC-5, "How to Perform Trouble Diagnosis For Quick and Accurate Repair"
.
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.
CHECK COMPRESSOR BELT TENSION
Check compressor belt tension. Refer to
(HR16DE) or
EM-142, "Checking Drive Belts"
EM-263, "Inspection and Adjustment"
(K9K).
OK or NG
OK
>> GO TO 5.
NG
>> Adjust or replace A/C compressor belt.
5.
CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to
HAC-73, "Component Function Check"
.
OK or NG
OK
>> GO TO 6.
SJIA0741E
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