Nissan Frontier. Instruction — part 871
HAC-38
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
BLOWER MOTOR CONTROL SYSTEM
SYMPTOM: Blower motor operation is malfunctioning under starting
blower speed control.
1.
CHECK FUSES
Check 15A fuses [No. 24 and 27 (Located in the fuse and fusible link box)]. For fuse layout. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 9.
2.
CHECK FRONT BLOWER MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front blower motor connector.
3. Turn ignition switch ON.
4. Press the A/C switch.
5. Rotate blower control dial to maximum speed.
6. Check voltage between front blower motor harness connector
M62 terminal 2 and ground.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> GO TO 3.
3.
CHECK FRONT BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front blower motor relay.
3. Check voltage between front blower motor relay harness con-
nector E54 terminals 5,7 and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
ALIIA0760GB
Fuses are good.
2 - Ground
: Battery voltage
WJIA1331E
5, 7 - Ground
: Battery voltage
WJIA1634E
BLOWER MOTOR CONTROL SYSTEM
HAC-39
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
4.
CHECK FRONT BLOWER MOTOR RELAY
Turn ignition switch OFF.
Check front blower motor relay. Refer to
HAC-41, "Front Blower Motor Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace front blower motor relay.
5.
CHECK FRONT BLOWER MOTOR RELAY (SWITCH SIDE) CIRCUIT FOR OPEN
Check continuity between front blower motor relay harness connec-
tor E54 terminals 3, 6 and front blower motor harness connector
M62 terminal 2.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK VARIABLE BLOWER CONTROL POWER SUPPLY CIRCUIT FOR OPEN
1. Disconnect variable blower control harness connector.
2. Check continuity between front blower motor relay harness con-
nector E54 (A) terminals 3, 6 and variable blower control har-
ness connector M121 (B) terminal 4.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair harness or connector.
7.
CHECK FRONT BLOWER MOTOR RELAY (COIL SIDE) GROUND CIRCUIT
Check continuity between front blower motor relay harness connec-
tor E54 terminal 2 and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair harness or connector.
8.
CHECK FRONT BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between front blower motor relay harness con-
nector E54 terminal 1 and ground.
Is the inspection result normal?
YES
>> Replace variable blower control. Refer to
.
NO
>> Repair front blower motor ground circuit or connector.
3, 6 - 2
: Continuity should exist.
WJIA1333E
3, 6 - 4
: Continuity should exist.
AWIIA1212ZZ
2 - Ground
: Continuity should exist
AWIIA1227ZZ
1 - Ground
: Battery voltage
WJIA1991E
HAC-40
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
BLOWER MOTOR CONTROL SYSTEM
9.
REPLACE FUSES
Replace fuses.
Does the fuse blow?
YES
>> • If fuse blows without activating the front blower motor, repair short between fuse and front
blower motor relay.
• If fuse blows activating the front blower motor, GO TO 10.
NO
>> Inspection End.
10.
CHECK FRONT BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT
1. Turn ignition switch OFF.
2. Disconnect front blower motor connector and variable blower
control connector.
3. Check continuity between variable blower control harness con-
nector M121 terminal 4 and ground.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Repair harness or connector.
11.
CHECK FRONT BLOWER MOTOR
Check front blower motor. Refer to
HAC-41, "Front Blower Motor Component Inspection"
.
Is the inspection result normal?
YES
>> Replace variable blower control. Refer to
VTL-12, "Removal and Installation"
.
NO
>> Replace front blower motor. Refer to
VTL-11, "Removal and Installation"
12.
CHECK FRONT BLOWER MOTOR
Check front blower motor. Refer to
HAC-41, "Front Blower Motor Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace front blower motor. Refer to
VTL-11, "Removal and Installation"
13.
CHECK BLOWER MOTOR GROUND CIRCUIT
1. Disconnect variable blower control harness connector.
2. Check continuity between front blower motor harness connector
M62 (B) terminal 1 and variable blower control harness connec-
tor M121 (A) terminal 2.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Repair harness or connector.
14.
CHECK VARIABLE BLOWER CONTROL POWER SUPPLY CIRCUIT FOR OPEN
4 - Ground
: Continuity should not exist.
AWIIA0177ZZ
1 - 2
: Continuity should exist.
AWIIA0179ZZ
BLOWER MOTOR CONTROL SYSTEM
HAC-41
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Check continuity between front blower motor relay harness connec-
tor E54 (A) terminals 3, 6 and variable blower control harness con-
nector M121 (B) terminal 4.
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> Repair harness or connector.
15.
CHECK VARIABLE BLOWER CONTROL GROUND CIRCUIT
Check continuity between variable blower control harness connector
M121 terminal 1 and ground.
Is the inspection result normal?
YES
>> GO TO 16.
NO
>> Repair harness or connector.
16.
CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT
1. Reconnect all disconnected component connectors.
2. Disconnect front air control connector.
3. Turn ignition switch ON.
4. Turn blower control dial to maximum speed.
5. check voltage between front air control harness connector M50 terminal 13 and ground.
Is the inspection result normal?
YES
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
NO
>> GO TO 17.
17.
CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect variable blower control.
3. Check continuity between front air control harness connector
M50 (B) terminal 13 and variable blower control harness con-
nector M121 (A) terminal 3.
Is the inspection result normal?
YES
>> Replace variable blower control. Refer to
.
NO
>> Repair harness or connector.
Front Blower Motor Component Inspection
INFOID:0000000009478288
COMPONENT INSPECTION
Front Blower Motor Relay
3, 6 - 4
: Continuity should exist.
AWIIA1212ZZ
1 - Ground
: Continuity should exist.
AWIIA0180ZZ
13 - Ground
Approx.: 4.5V
13 - 3
: Continuity should exist.
AWIIA0414ZZ
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст