Infiniti G35 (V35). Manual — part 104
TROUBLE DIAGNOSIS
ATC-87
C
D
E
F
G
H
I
K
L
M
A
B
ATC
11.
CHECK VOLTAGE FOR DISPLAY AND A/C AUTO AMP. (FAN ON SIGNAL)
1.
Reconnect BCM connector and display and A/C auto amp. con-
nector.
2.
Turn ignition switch ON.
3.
Check voltage between display and A/C auto amp. harness con-
nector M31 terminal 9 and ground.
OK or NG
OK
>> GO TO 12.
NG-1
>> If the voltage is approx. 5 V when blower motor is ON: Replace display and A/C auto amp.
NG-2
>> If the voltage is approx. 0 V when blower motor is OFF: Replace BCM.
12.
CHECK DISPLAY AND A/C AUTO AMP. INPUT (COMPRESSOR FEEDBACK) SIGNAL
Check voltage between display and A/C auto amp. harness connec-
tor M31 terminal 11 and ground.
OK or NG
OK
>> Check CAN communication. Refer to
BCS-15, "CAN Communication Inspection Using CON-
.
●
BCM – ECM
●
ECM – IPDM E/R
●
ECM – Combination meter
NG-1
>> If the voltage is approx. 5 V when refrigerant pressure sensor connector is connected: GO TO 13.
NG-2
>> If the voltage is approx. 0 V when refrigerant pressure sensor connector is disconnected: Replace
display and A/C auto amp.
Terminals
Condition
Voltage
(+)
(
−
)
Display and A/C
auto amp.
connector
Terminal
No.
M31
9
Ground
A/C switch: ON
(Blower motor oper-
ates.)
Approx. 0 V
OFF switch: ON
(A/C system: OFF)
Approx. 5 V
RJIA3517E
Terminals
Condition
Voltage
(+)
(
−
)
Display and A/C
auto amp.
connector
Terminal
No.
M31
11
Ground
A/C switch: ON
(Blower motor
operates.)
Approx. 0 V
A/C switch: ON
(When refrigerant
pressure sensor
connector is discon-
nected.)
Approx. 5 V
RJIA3518E
ATC-88
TROUBLE DIAGNOSIS
13.
CHECK CIRCUIT CONTINUITY BETWEEN COMBINATION METER AND DISPLAY AND A/C AUTO
AMP.
1.
Turn ignition switch OFF.
2.
Disconnect display and A/C auto amp. connector and combina-
tion meter connector.
3.
Check continuity between combination meter harness connector
M19 terminal 12 and display and A/C auto amp. harness con-
nector M31 terminal 11.
OK or NG
OK
>> INSPECTION END
NG
>> Repair harness or connector.
COMPONENT INSPECTION
Refrigerant Pressure Sensor
The refrigerant pressure sensor is attached to the condenser.
Make sure that the A/C refrigerant pressure and the sensor output
voltage are within the specified range as shown in the A/C operating
condition figure. Refer to
12 – 11
: Continuity should exist.
RJIA3519E
RJIA1867E
SJIA1841E
TROUBLE DIAGNOSIS
ATC-89
C
D
E
F
G
H
I
K
L
M
A
B
ATC
Insufficient Cooling
NJS0003L
SYMPTOM: Insufficient cooling
INSPECTION FLOW
*1
ATC-52, "FUNCTION CONFIRMATION
PROCEDURE"
, see No. 1.
*2
ATC-71, "Air Mix Door Motor Circuit"
*3
*4
ATC-58, "AUXILIARY MECHANISM:
TEMPERATURE SETTING TRIMMER"
*5
ATC-52, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 14.
*6
RJIA3520E
ATC-90
TROUBLE DIAGNOSIS
PERFORMANCE TEST DIAGNOSIS
*7
ATC-77, "Blower Motor Circuit"
*8
ATC-82, "Magnet Clutch Circuit"
*9
ATC-90, "PERFORMANCE TEST
DIAGNOSIS"
*10
*11
ATC-52, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 5 to
7.
*12
ATC-6, "CONTAMINATED REFRIG-
ERANT"
*13
*14
SJIA1226E
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