Infiniti G35 (V35) Sedan. Manual — part 776
HAC-76
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR MIX DOOR MOTOR
Check air mix door motor (driver side). Refer to
Is it installed normally?
YES
>> GO TO 4.
NO
>> Replace air mix door motor (driver side).
4.
CHECK POWER SUPPLY FOR UNIFIED METER AND A/C AMP.
1.
Turn ignition switch ON.
2.
Check voltage between unified meter and A/C amp. harness connector M67 terminal 70 and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace unified meter and A/C amp.
5.
CHECK SIGNAL FOR UNIFIED METER AND A/C AMP.
Confirm A/C LAN signal between unified meter and A/C amp. harness connector M67 terminal 69 and ground
using an oscilloscope.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace unified meter and A/C amp.
6.
CHECK POWER SUPPLY FOR AIR MIX DOOR MOTOR (DRIVER SIDE)
Check voltage between air mix door motor (driver side) harness connector M252 terminal 1 and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair harness or connector.
7.
CHECK SIGNAL FOR AIR MIX DOOR MOTOR (DRIVER SIDE)
Confirm A/C LAN signal between air mix door motor (driver side) harness connector M252 terminal 3 and
ground using an oscilloscope.
(+)
(
−
)
Voltage
Unified meter and A/C amp.
—
Connector
Terminal
M67
70
Ground
Battery voltage
(+)
(
−
)
Voltage
Unified meter and A/C amp.
—
Connector
Terminal
M67
69
Ground
SJIA1453J
(+)
(
−
)
Voltage
Air mix door motor (driver side)
—
Connector
Terminal
M252
1
Ground
Battery voltage
AIR MIX DOOR MOTOR
HAC-77
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair harness or connector.
8.
CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect air mix door motor (driver side) connector.
3.
Check continuity between air mix door motor (driver side) harness connector M252 terminal 2 and ground.
Is the inspection result normal?
YES
>> Replace air mix door motor (driver side).
NO
>> Repair harness or connector.
9.
CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE)
Check air mix door motor (passenger side). Refer to
.
Is it installed normally?
YES
>> GO TO 10.
NO
>> Replace air mix door motor (passenger side).
10.
CHECK POWER SUPPLY FOR UNIFIED METER AND A/C AMP.
1.
Turn ignition switch ON.
2.
Check voltage between unified meter and A/C amp. harness connector M67 terminal 70 and ground.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace unified meter and A/C amp.
11.
CHECK SIGNAL FOR UNIFIED METER AND A/C AMP.
Confirm A/C LAN signal between unified meter and A/C amp. harness connector M67 terminal 69 and ground
using an oscilloscope.
(+)
(
−
)
Voltage
Air mix door motor (driver side)
—
Connector
Terminal
M252
3
Ground
SJIA1453J
(+)
(
−
)
Continuity
Air mix door motor (driver side)
—
Connector
Terminal
M252
2
Ground
Continuity should exist
(+)
(
−
)
Voltage
Unified meter and A/C amp.
—
Connector
Terminal
M67
70
Ground
Battery voltage
HAC-78
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR MIX DOOR MOTOR
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Replace unified meter and A/C amp.
12.
CHECK POWER SUPPLY FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)
Check voltage between air mix door motor (passenger side) harness connector M255 terminal 1 and ground.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Repair harness or connector.
13.
CHECK SIGNAL FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)
Confirm A/C LAN signal between air mix door motor (passenger side) harness connector M255 terminal 3 and
ground using an oscilloscope.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Repair harness or connector.
14.
CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect air mix door motor (passenger side) connector.
3.
Check continuity between air mix door motor (passenger side) harness connector M255 terminal 2 and
ground.
(+)
(
−
)
Voltage
Unified meter and A/C amp.
—
Connector
Terminal
M67
69
Ground
SJIA1453J
(+)
(
−
)
Voltage
Air mix door motor (passenger side)
—
Connector
Terminal
M255
1
Ground
Battery voltage
(+)
(
−
)
Voltage
Air mix door motor (passenger side)
—
Connector
Terminal
M255
3
Ground
SJIA1453J
AIR MIX DOOR MOTOR
HAC-79
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is the inspection result normal?
YES
>> Replace air mix door motor (passenger side).
NO
>> Repair harness or connector.
(+)
(
−
)
Continuity
Air mix door motor (passenger side)
—
Connector
Terminal
M255
2
Ground
Continuity should exist
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