Nissan Qashqai J11. Manual — part 1118
HAC-108
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Diagnosis Procedure
INFOID:0000000010432228
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check 10 A fuse [No. 14 (without stop/start system), located in fuse block (J/B)], [No. 76 (with stop/start
system)].
NOTE:
Refer to
PG-104, "Fuse, Connector and Terminal Arrangement"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.
CHECK A/C AUTO AMP. ACCESSORY POWER SUPPLY
1.
Disconnect A/C auto amp. connector.
2.
Turn ignition switch ON.
3.
Check voltage between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector between A/C auto amp. and fuse.
3.
CHECK A/C AUTO AMP. GROUND CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Check continuity between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-129, "Removal and Installation"
.
NO
>> Repair harness or connector.
A/C CONTROL
A/C CONTROL : Diagnosis Procedure
INFOID:0000000010432229
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check 10 A fuse [No. 14 (without stop/start system), located in fuse block (J/B)], [No. 76 (with stop/start
system)].
NOTE:
Refer to
PG-104, "Fuse, Connector and Terminal Arrangement"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.
CHECK A/C CONTROL POWER SUPPLY
1.
Turn ignition switch OFF.
+
−
Voltage
A/C auto amp.
Connector
Terminal
M141
41
Ground
11 - 14 V
A/C auto amp.
—
Continuity
Connector
Terminal
M141
43
Ground
Existed
POWER SUPPLY AND GROUND CIRCUIT
HAC-109
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
2.
Disconnect A/C control connector.
3.
Turn ignition switch ON.
4.
Check voltage between A/C control harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector between A/C control and fuse block (J/B).
3.
CHECK A/C CONTROL GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between A/C control harness connector and ground.
Is the inspection result normal?
YES
>> Replace A/C control. Refer to
HAC-128, "Removal and Installation"
NO
>> Repair harness or connector.
+
−
Voltage
A/C control
Connector
Terminal
M6
4
Ground
11 - 14 V
A/C control
—
Continuity
Connector
Terminal
M6
1
Ground
Existed
HAC-110
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
BLOWER MOTOR
BLOWER MOTOR
Diagnosis Procedure
INFOID:0000000010432235
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check following fuses.
-
20 A fuse [Nos. 7 and 17, located in fuse block (J/B)]
NOTE:
Refer to
PG-104, "Fuse, Connector and Terminal Arrangement"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.
CHECKPOWER TRANSISTOR POWER SUPPLY
1.
Disconnect power transistor connector.
2.
Turn ignition switch ON.
3.
Check voltage between power transistor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK BLOWER RELAY
1.
Turn ignition switch OFF.
2.
Check blower relay. Refer to
HAC-113, "Component Inspection (Blower Relay)"
.
Is the inspection result normal?
YES
>> Repair harness or connector between power transistor and fuse.
NO
>> Replace blower relay.
4.
CHECK BLOWER MOTOR CONTROL CIRCUIT
1.
Turn ignition switch OFF.
2.
Connect power transistor connector.
3.
Disconnect blower motor connector.
4.
Turn ignition switch ON.
5.
Check voltage between blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK BLOWER MOTOR CONTROL CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect power transistor connector.
3.
Check continuity between power transistor harness connector and blower motor harness connector.
+
−
Voltage
Blower motor
Connector
Terminal
M359
4
Ground
Battery voltage
+
−
Voltage
Blower motor
Connector
Terminal
M357
1
Ground
Battery voltage
BLOWER MOTOR
HAC-111
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is the inspection result normal?
YES
>> Replace power transistor. Refer to
HAC-136, "Removal and Installation"
.
NO
>> Repair harness or connector.
6.
CHECK BLOWER MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect power transistor connector.
3.
Check continuity between power transistor harness connector and blower motor harness connector.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair harness or connector.
7.
CHECK POWER TRANSISTOR GROUND CIRCUIT
Check continuity between power transistor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair harness or connector.
8.
CHECK POWER TRANSISTOR CONTROL SIGNAL
1.
Connect power transistor connector and A/C auto amp. connector.
2.
Turn ignition switch ON.
3.
Set air outlet to VENT.
4.
Change fan speed from 1st – 7th, and check duty ratios between power transistor harness connector and
ground by using an oscilloscope.
NOTE:
Calculate the drive signal duty ratio as shown in the figure.
T2 = Approx. 2.5 ms
Power transistor
Blower motor
Continuity
Connector
Terminal
Connector
Terminal
M360
5
M357
1
Existed
Power transistor
Blower motor
Continuity
Connector
Terminal
Connector
Terminal
M360
6
M357
2
Existed
Power transistor
—
Continuity
Connector
Terminal
M359
2
Ground
Existed
+
−
Condition
Duty ratio
(Approx.)
Voltage
Power transistor
Connector
Terminal
Fan speed (manual)
Air outlet: VENT
For Europe
and Russia
Except for Eu-
rope and Rus-
sia
M359
1
Ground
1st
21%
23%
2nd
24%
29%
3rd
31%
36%
4th
40%
44%
5th
54%
52%
6th
70%
61%
7th
100%
72%
JPIIA1646GB
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