Infiniti G35 (V35). Manual — part 98
TROUBLE DIAGNOSIS
ATC-63
C
D
E
F
G
H
I
K
L
M
A
B
ATC
1.
CHECK POWER SUPPLY CIRCUIT FOR DISPLAY AND A/C AUTO AMP.
1.
Disconnect display and A/C auto amp. connector.
2.
Check voltage between display and A/C auto amp. harness con-
nector M31 terminals 2, 3, 23 and ground.
OK or NG
OK
>> GO TO 2.
NG
>> Check 10A fuses [Nos. 6, 12 and 19, located in the fuse block (J/B)]. Refer to
●
If fuses are OK, check harness for open circuit. Repair or replace if necessary.
●
If fuses are NG, check harness for short circuit and replace fuse.
2.
CHECK GROUND CIRCUIT FOR DISPLAY AND A/C AUTO AMP.
1.
Turn ignition switch OFF.
2.
Check continuity between display and A/C auto amp. harness
connector M31 terminal 5 and ground.
OK or NG
OK
>> Replace display and A/C auto amp.
NG
>> Repair harness or connector.
Terminals
Ignition switch position
(+)
(
−
)
OFF
ACC
ON
Display and A/C
auto amp.
connector
Terminal No.
M31
2
Ground
Approx.
0 V
Approx.
0 V
Battery
voltage
M31
3
Battery
voltage
Battery
voltage
Battery
voltage
M31
23
Approx.
0 V
Battery
voltage
Battery
voltage
RJIA3499E
5 – Ground
: Continuity should exist.
RJIA3500E
ATC-64
TROUBLE DIAGNOSIS
LAN System Circuit
NJS0003E
SYMPTOM: Mode door motor, intake door motor and/or air mix door motor(s) does not operate normally.
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT
1.
CHECK POWER SUPPLY FOR DISPLAY AND A/C AUTO AMP.
1.
Turn ignition switch ON.
2.
Check voltage between display and A/C auto amp. harness con-
nector M31 terminal 29 and ground.
OK or NG
OK
>> GO TO 2.
NG
>> Replace display and A/C auto amp.
2.
CHECK SIGNAL FOR DISPLAY AND A/C AUTO AMP.
Confirm A/C LAN signal between display and A/C auto amp. harness
connector M31 terminal 12 and ground using an oscilloscope.
OK or NG
OK
>> GO TO 3.
NG
>> Replace display and A/C auto amp.
SJIA1842E
29 – Ground
: Battery voltage
RJIA3502E
Terminals
Voltage
(+)
(
−
)
Display and A/C
auto amp.
connector
Terminal No.
M31
12 Ground
RJIA3503E
SJIA1453J
TROUBLE DIAGNOSIS
ATC-65
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D
E
F
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M
A
B
ATC
3.
CHECK POWER SUPPLY FOR EACH DOOR MOTOR
Check voltage between each door motor harness connector terminal
1 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair harness or connector.
4.
CHECK SIGNAL FOR EACH DOOR MOTOR
Confirm A/C LAN signal between each door motor harness connec-
tor terminal 3 and ground using an oscilloscope.
*: With left and right ventilation temperature separately control system
OK or NG
OK
>> GO TO 5.
NG
>> Repair harness or connector.
5.
CHECK MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect each door motor connector.
3.
Check continuity between each door motor harness connector
terminal 2 and ground.
OK or NG
OK
>> GO TO 6.
NG
>> Repair harness or connector.
1 – Ground
: Battery voltage
RJIA1988E
Door motor
Terminals
Voltage
(+)
(
−
)
Con-
nector
Terminal
No.
Mode
M252
3
Ground
Air mix (Pas-
senger side)
M253
3
Air mix (Driver
side)*
M254
3
Intake
M255
3
RJIA1989E
SJIA1453J
2 – Ground
: Continuity should exist.
RJIA1990E
ATC-66
TROUBLE DIAGNOSIS
6.
CHECK MOTOR OPERATION
1.
Reconnect each door motor connector.
2.
Turn ignition switch ON.
3.
Confirm operation of each door motor.
OK or NG
OK
>> (Return to operate normally.)
●
Poor contact in motor connector.
NG
>> (Does not operate normally.)
●
GO TO 7.
7.
CHECK AIR MIX DOOR MOTOR AND INTAKE DOOR MOTOR OPERATION
1.
Turn ignition switch OFF.
2.
Disconnect mode, air mix (driver side, passenger side), and intake door motor connectors.
3.
Reconnect air mix (driver side, passenger side) and intake door motor connectors.
4.
Turn ignition switch ON.
5.
Confirm operation of air mix door motor (driver side, passenger side) and intake door motor.
OK or NG
OK
>> [Air mix (driver side, passenger side) and intake door motors operate normally.]
●
Replace mode door motor.
NG
>> [Air mix (driver side, passenger side) and intake door motors does not operate normally.]
●
GO TO 8.
8.
CHECK MODE DOOR MOTOR AND INTAKE DOOR MOTOR OPERATION
1.
Turn ignition switch OFF.
2.
Disconnect air mix door motor (driver side, passenger side) connectors.
3.
Reconnect mode door motor connector.
4.
Turn ignition switch ON.
5.
Confirm operation of mode door motor and intake door motor.
OK or NG
OK
>> (Mode and intake door motors operate normally.)
●
GO TO 10.
NG
>> (Mode and intake door motors does not operate normally.)
●
GO TO 9.
9.
CHECK MODE DOOR MOTOR AND AIR MIX DOOR MOTOR OPERATION
1.
Turn ignition switch OFF.
2.
Disconnect intake door motor connector.
3.
Reconnect air mix door motor (driver side, passenger side) connectors.
4.
Turn ignition switch ON.
5.
Confirm operation of mode door motor and air mix door motor (driver side, passenger side).
OK or NG
OK
>> [Mode and air mix door motor (driver side, passenger side) operate normally.]
●
Replace intake door motor.
NG
>> [Mode and air mix door motor (driver side, passenger side) does not operate normally.]
●
Replace display and A/C auto amp.
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