Nissan Cube. Instruction — part 556
HAC-62
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
BLOWER FAN ON SIGNAL
BLOWER FAN ON SIGNAL
Component Function Check
INFOID:0000000009951009
1.
CHECK BLOWER FAN ON SIGNAL
With CONSULT
1.
Turn the ignition switch ON.
2.
Select the “FAN REQ SIG” in “DATA MONITOR”
3.
Check the fan ON signal when the fan control switch is operated.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Refer to
Diagnosis Procedure
INFOID:0000000009951010
1.
CHECK BLOWER FAN ON SIGNAL
1.
Turn the ignition switch ON.
2.
Check output waveform between A/C auto amp. and ground with using the oscilloscope.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the A/C auto amp.
2.
CHECK CONTINUITY BETWEEN A/C AUTO AMP. AND BCM
1.
Turn the ignition switch OFF.
2.
Disconnect the A/C auto amp. connector.
3.
Disconnect the BCM connector.
4.
Check continuity A/C auto amp. harness connector and BCM harness connector.
Is inspection result normal?
YES
>> GO TO 3.
NO
>> Repair the harnesses or connectors.
3.
CHECK CONTINUITY BETWEEN A/C AUTO AMP. AND GROUND
Check continuity between A/C auto amp. harness connector and ground.
Monitor item
Condition
Status
FAN REQ SIG
Fan control switch
OFF position
Off
Except OFF position
On
(+)
(
−
)
Condition
Output waveform
A/C auto amp.
—
Connector
Terminal
M51
35
Ground
• Ignition switch ON
• Fan speed: Instruction 1st
SJIA1425J
A/C auto amp.
BCM
Continuity
Connector
Terminal
Connector
Terminal
M51
35
M65 (WITHOUT I-KEY)
M68 (WITH I-KEY)
28
Existed
BLOWER FAN ON SIGNAL
HAC-63
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is inspection result normal?
YES
>> Replace the BCM. Refer to
(WITH I-KEY) or
(WITHOUT I-KEY).
NO
>> Repair the harnesses or connectors.
A/C auto amp.
—
Continuity
Connector
Terminal
M51
35
Ground
Not existed
HAC-64
< 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:0000000009951011
1.
CHECK FUSE
Check 10A fuses [Nos. 2, 10 and 16, located in the fuse block (J/B)].
NOTE:
Refer to
PG-77, "Fuse, Connector and Terminal Arrangement"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the fuse after repairing the applicable circuit.
2.
CHECK A/C AUTO AMP. POWER SUPPLY CIRCUIT-1
1.
Turn the ignition switch OFF.
2.
Disconnect the A/C auto amp. connector.
3.
Check voltage between A/C auto amp. harness connector and the ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair the harnesses or connectors.
3.
CHECK A/C AUTO AMP. POWER SUPPLY CIRCUIT-2
Check voltage A/C auto amp. harness connector and the ground.
Is inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 5.
4.
CHECK A/C AUTO AMP. CIRCUIT CONTINUITY
1.
Turn the ignition switch OFF.
2.
Check continuity between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair the harnesses or connectors.
5.
CHECK BLOWER MOTOR RELAY POWER SUPPLY
1.
Turn the ignition switch OFF.
2.
Disconnect the blower motor relay from the fuse block (J/B). Refer to
PG-77, "Fuse, Connector and Termi-
(+)
(
−
)
Voltage
A/C auto amp.
—
Ignition switch position
Connector
Terminal
OFF
ACC
ON
M50
4
Ground
Battery voltage
Battery voltage
Battery voltage
5
Approx. 0 V
Approx. 0 V
Battery voltage
(+)
(
−
)
Voltage
A/C auto amp.
—
Ignition switch position
Connector
Terminal
OFF
ACC
ON
M50
9
Ground
Approx. 0 V
Approx. 0 V
Battery voltage
A/C auto amp.
—
Continuity
Connector
Terminal
M50
16
Ground
Existed
POWER SUPPLY AND GROUND CIRCUIT
HAC-65
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
3.
Turn the ignition switch ON.
4.
Check voltage between the ground and the connector on the fuse block side where blower motor relay
was installed. Refer to
.
Is inspection result normal?
YES
>> GO TO 6.
NO
>> Repair the power supply circuit. Refer to
PG-6, "Wiring Diagram - BATTERY POWER SUPPLY -"
.
6.
CHECK BLOWER MOTOR RELAY
Perform the blower motor component inspection. Refer to
HAC-57, "Component Inspection"
.
Is inspection result normal?
YES
>> Repair the harness or connector between blower motor relay and A/C auto amp.
NO
>> Replace blower motor relay.
(+)
(
−
)
Voltage
(Approx.)
Fuse block (J/B)
—
1
Ground
Battery voltage
3
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