Infiniti G37 Coupe. Manual - part 923

MWI-38

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (UNIFIED METER AND A/C AMP.)

HI-BEAM IND
[On/Off]

Status of high beam indicator lamp judged from high beam request signal received 
from BCM with CAN communication line.

TURN IND
[On/Off]

Status of turn indicator lamp judged from turn indicator signal received from BCM 
with CAN communication line.

FR FOG IND
[On/Off]

Status of front fog light indicator lamp judged from front fog light request signal re-
ceived from BCM with CAN communication line.

RR FOG IND
[Off]

This item is displayed, but cannot be monitored.

LIGHT IND
[On/Off]

Status of light indicator lamp judged from position light request signal received 
from BCM with CAN communication line.

OIL W/L
[On/Off]

Status of oil pressure warning lamp judged from oil pressure switch signal re-
ceived from IPDM E/R with CAN communication line.

MIL
[On/Off] 

Status of malfunction indicator lamp judged from malfunctioning indicator lamp 
signal received from ECM with CAN communication line.

GLOW IND
[On/Off] 

This item is displayed, but cannot be monitored.

C-ENG2 W/L
[On/Off] 

This item is displayed, but cannot be monitored.

CRUISE IND
[On/Off]

Status of CRUISE indicator judged from ASCD status signal received from ECM 
with CAN communication line.

SET IND
[On/Off]

Status of SET indicator judged from ASCD SET indicator signal received from 
ECM with CAN communication line.

CRUISE W/L
[On/Off]

Status of CRUISE warning lamp judged from ASCD status signal received from 
ECM with CAN communication line.

BA W/L
[Off]

This item is displayed, but cannot be monitored.

ATC/T-AMT W/L
[On/Off]

Status of A/T check warning lamp judged from A/T check indicator signal received 
from TCM with CAN communication line.

4WD W/L
[On/Off]

This item is displayed, but cannot be monitored.

4WD LOCK IND
[Off]

This item is displayed, but cannot be monitored.

FUEL W/L
[On/Off]

Low-fuel warning lamp status judged by the identified fuel level.

WASHER W/L
[On/Off]

Status of washer warning lamp judged from washer level switch input to combina-
tion meter.

AIR PRES W/L
[On/Off]

Status of low tire pressure warning lamp judged from tire pressure signal received 
from BCM with CAN communication line.

KEY G/Y W/L
[On/Off]

Status of key warning lamp (G/Y) judged from key warning signal received from 
BCM with CAN communication line.

AFS OFF IND
[On/Off]

Status of AFS OFF indicator lamp judged from AFS OFF indicator lamp signal re-
ceived from AFS control unit with CAN communication line.

4WAS/RAS W/L
[On/Off]

Status of 4WAS warning lamp judged from 4WAS warning lamp signal received 
from 4WAS main control unit with CAN communication line.

HDC W/L
[On/Off] 

This item is displayed, but cannot be monitored.

LDP R IND
[On/Off] 

This item is displayed, but cannot be monitored.

LDP G Y IND
[On/Off] 

This item is displayed, but cannot be monitored.

Display item [Unit]

MAIN

SIGNALS

Description

MWI

DIAGNOSIS SYSTEM (UNIFIED METER AND A/C AMP.)

MWI-39

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

LCD
[B&P N, B&P I, ID NG, ROTAT, SFT 
P, INSRT, BATT, NO KY,OUTKY, LK 
WN, C&P N, C&P I]

Displays status of Intelligent Key system warning judged from meter display signal 
received from BCM with CAN communication line.

ACC TARGET
[On/Off]

Status of vehicle ahead detection indicator judged from meter display signal re-
ceived from ICC sensor integrated unit with CAN communication line.

ACC DISTANCE
[Off, SHOR, MID, LONG]

Status of set distance indicator judged from meter display signal received from 
ICC sensor integrated unit with CAN communication line.

ACC OWN VHL
[On/Off]

Status of own vehicle indicator judged from meter display signal received from 
ICC sensor integrated unit with CAN communication line.

ACC SET SPEED

Display ICC set vehicle speed from meter display signal received from ICC sensor 
integrated unit with CAN communication line.

ACC UNIT
[On/Off]

Status of display unit judged from meter display signal received from ICC sensor 
integrated unit with CAN communication line.

O/D OFF SW
[On/Off] 

This item is displayed, but cannot be monitored.

SHIFT IND
[P, R, N, D, M1, M2, M3, M4, M5]

Status of shift position indicator judged from shift position signal and manual mode 
indicator signal received from TCM with CAN communication line.

AT S MODE SW
[On/Off]

Status of snow mode switch.

AT P MODE SW
[On/Off]

This item is displayed, but cannot be monitored.

M RANGE SW
[On/Off]

Status of manual mode switch.

NM RANGE SW
[On/Off]

Status of not manual mode switch.

AT SFT UP SW
[On/Off]

Status of A/T shift up switch.

AT SFT DWN SW
[On/Off]

Status of A/T shift down switch.

ST SFT UP SW
[On/Off]

Status of paddle shifter up switch.

ST SFT DWN SW
[On/Off]

Status of paddle shifter down switch.

COMP F/B SIG
[On/Off]

A/C compressor activation condition that ECM judges according to the water tem-
perature and the acceleration degree.

4WD LOCK SW
[Off]

This item is displayed, but cannot be monitored.

PKB SW
[On/Off]

Status of parking brake switch.

BUCKLE SW
[On/Off]

Status of seat belt buckle switch.

BRAKE OIL SW
[On/Off]

Status of brake fluid level switch.

DISTANCE
[km]

Value of possible driving distance calculated by unified meter and A/C amp.

OUTSIDE TEMP
[

°

C or 

°

F]

Ambient air temperature value converted from ambient sensor signal received 
from ambient sensor.
NOTE:
This may not match with the temperature value indicated on the information dis-
play. (Because the information display value is a corrected value from the ambient 
sensor input value.)

Display item [Unit]

MAIN

SIGNALS

Description

MWI-40

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (UNIFIED METER AND A/C AMP.)

NOTE:

Some items are not available according to vehicle specification.

FUEL LOW SIG
[On/Off]

Status of fuel level low warning signal to output to AV control unit with CAN com-
munication line.

BUZZER 
[On/Off]

X

Buzzer status (in the combination meter) is judged with the buzzer output signal 
received from each unit with CAN communication line and the warning output con-
dition of the combination meter.

Display item [Unit]

MAIN

SIGNALS

Description

MWI

U1000 CAN COMM CIRCUIT

MWI-41

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000001606648

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 two
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.
CAN Communication Signal Chart. Refer to 

LAN-25, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000001606649

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001606650

1.

PERFORM SELF DIAGNOSTIC

1.

Turn ignition switch ON and wait for 2 seconds or more.

2.

Check “Self Diagnostic Result” of “METER/M&A”. 

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-16, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-38, "Intermittent Incident"

.

DTC

Display contents of 

CONSULT-III

Diagnostic item is detected when ...

Probable malfunction location

U1000

CAN COMM CIRCUIT

When unified meter and A/C amp. is not trans-
mitting or receiving CAN communication sig-
nal for 2 seconds or more.

CAN communication system