Infiniti M35/M45 Y50. Manual — part 122
AIR CONDITIONER CONTROL
ATC-39
C
D
E
F
G
H
I
K
L
M
A
B
ATC
CAN Communication System Description
NJS000GC
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. For details, refer to
ATC-40
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
PFP:00004
CONSULT-II Function (ECM)
NJS000GD
CONSULT-II can display each diagnosis item using the diagnosis test modes shown following.
CONSULT-II BASIC OPERATION
Refer to
GI-38, "CONSULT-II Start Procedure"
DATA MONITOR
Operation Procedure
1.
Touch “ENGINE” on “SELECT SYSTEM” screen.
2.
Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
3.
Touch “SELECTION FROM MENU” on “DATA MONITOR” screen.
4.
When “SELECTION FROM MENU” is selected, touch items to be monitored.
5.
Touch “START”.
6.
Touch “RECORD” while monitoring, then the status of the monitored item can be recorded. To stop
recording, touch “STOP”.
Display Item List
How to Perform Trouble Diagnosis for Quick and Accurate Repair
NJS000GE
WORK FLOW
System part
Check item, diagnosis mode
Description
ECM
Data monitor
Displays ECM input data in real time.
Monitor item name
“operation or unit”
Contents
AIR COND SIG
“ON/OFF”
Displays “COMP (ON)/COMP (OFF)” status as judged from air conditioner switch signal.
HEATER FAN SW
“ON/OFF”
Displays “FAN (ON)/FAN (OFF)” status as judged from blower fan motor switch signal.
IGNITION SW
“ON/OFF”
Displays “IGN position (ON)/OFF, ACC position (OFF)” status as judged from ignition switch signal.
AC PRESS SEN
“V”
Displays “Refrigerant pressure sensor for voltage” status as inputted from refrigerant pressure sen-
sor.
*1
SHA900E
TROUBLE DIAGNOSIS
ATC-41
C
D
E
F
G
H
I
K
L
M
A
B
ATC
SYMPTOM TABLE
Symptom
Reference Page
A/C system does not come on.
Go to Trouble Diagnosis Procedure for A/C System.
A/C system cannot be controlled.
Go to Multifunction Switch System.
(With-
out mobile enter-
tainment system) or
(With
mobile entertain-
ment system)
Air outlet does not change.
Go to Trouble Diagnosis Procedure for Mode Door Motor. (LAN)
Mode door motor does not operate normally.
Upper ventilator outlet does not change.
Go to Trouble Diagnosis Procedure for Upper Ventilator Door
Motor. (LAN)
Upper ventilator door motor does not oper-
ate normally.
Discharge air temperature does not change.
Go to Trouble Diagnosis Procedure for Air Mix Door Motor.
(LAN)
Air mix door motor does not operate nor-
mally.
Intake door does not change.
Go to Trouble Diagnosis Procedure for Intake Door Motor. (LAN)
Intake door motor does not operate nor-
mally.
Blower motor operation is malfunctioning.
Go to Trouble Diagnosis Procedure for Blower Motor.
Magnet clutch does not engage.
Go to Trouble Diagnosis Procedure for Magnet Clutch.
Insufficient cooling
Go to Trouble Diagnosis Procedure for Insufficient Cooling.
Go to Diagnosis Procedure for Insufficient Cooling.
Insufficient heating
Go to Trouble Diagnosis Procedure for Insufficient Heating.
Noise
Go to Trouble Diagnosis Procedure for Noise.
Self-diagnosis cannot be performed.
Go to Trouble Diagnosis Procedure for Self-diagnosis.
Memory function does not operate.
Go to Trouble Diagnosis Procedure for Memory Function.
Rear control switch does not operate.
Go to Trouble Diagnosis Procedure for Rear Control Switch.
ATC-42
TROUBLE DIAGNOSIS
Component Parts and Harness Connector Location
NJS000GF
ENGINE COMPARTMENT
RJIA4030E
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