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