Infiniti FX35 / FX45. Manual - part 119
ATC-72
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
3.
Check continuity between BCM harness connector M3 terminal
27 and unified meter and A/C amp. harness connector M57 ter-
minal 42.
OK or NG
OK
>> GO TO 7.
NG
>> Repair harness or connector.
7.
CHECK VOLTAGE FOR UNIFIED METER AND A/C AMP. (COMPRESSOR ON SIGNAL)
1.
Reconnect BCM connector and unified meter and A/C amp. connector.
2.
Turn ignition switch ON.
3.
Check voltage between unified meter and A/C amp. harness
connector M57 terminal 42 and ground using an oscilloscope.
OK or NG
OK
>> GO TO 8.
NG-1
>> If the voltage is approx. 5 V when A/C switch is ON: Replace unified meter and A/C amp.
NG-2
>> If the voltage is approx. 0 V when A/C switch is OFF: Replace BCM.
8.
CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-III
1.
Start the engine.
2.
Check voltage of refrigerant pressure sensor in “Data monitor”. Refer to
EC-127, "CONSULT-III Reference
EC-705, "CONSULT-III Reference Value in Data Monitor
WITHOUT CONSULT-III
1.
Start the engine.
27 – 42
: Continuity should exist.
RJIA2006E
RJIA2007E
Terminals
Condition
Voltage
(+)
(
−
)
Unified meter
and A/C amp.
connector
Terminal
No.
M57
42
Ground
A/C switch: ON
(Blower motor operates.)
Approx. 0 V
OFF switch: ON
(A/C system: OFF)
SJIA1423J