Infiniti G35 (V35) Sedan. Manual - part 953

MWI

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

MWI-39

< FUNCTION DIAGNOSIS >

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NOTE:

Some items are not available according to vehicle specification.

ACC UNIT
[On/Off]

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

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

Status of A/T 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 FB 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 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.)

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]

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

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< COMPONENT DIAGNOSIS >

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000000964372

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-28, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000000964373

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000000964374

1.

PERFORM SELF DIAGNOSTIC

1.

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

2.

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

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-18, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-39, "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

MWI

U1010 CONTROL UNIT (CAN)

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< COMPONENT DIAGNOSIS >

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U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000000964375

Initial diagnosis of unified meter and A/C amp.

DTC Logic

INFOID:0000000000964376

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000000964377

1.

REPLACE UNIFIED METER AND A/C AMP.

When DTC U1010 is detected, replace unified meter and A/C amp.

>> INSPECTION END

DTC

Display contents of CON-

SULT-III

Diagnostic item is detected when ...

Probable malfunction location

U1010

CONTROL UNIT (CAN)

If any malfunction is detected during initial di-
agnosis of unified meter and A/C amp. CAN 
controller

Unified meter and A/C amp.

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< COMPONENT DIAGNOSIS >

B2201 COMMUNICATION ERROR 1

B2201 COMMUNICATION ERROR 1

Description

INFOID:0000000000964378

The communication line (LCD <-> AMP.) is used to communicate signals between the combination meter and
the unified meter and A/C amp. in order to control the information display.

DTC Logic

INFOID:0000000000964379

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000000964380

1.

CHECK CONNECTOR

Check combination meter, unified meter and A/C amp. and terminals (combination meter side, unified meter
and A/C amp. side, and harness side) for looseness or bent.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair terminal or connector.

2.

CHECK CONTINUITY COMMUNICATION CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector and unified meter and A/C amp. connector.

3.

Check continuity between combination meter harness connector M53 terminals 24, 25 and unified meter
and A/C amp. harness connector M66 terminals 14, 34.

4.

Check continuity between combination meter harness connector M53 terminals 24, 25 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK UNIFIED METER AND A/C AMP. OUTPUT VOLTAGE

1.

Connect unified meter and A/C amp. connector.

2.

Turn ignition switch ON.

3.

Check voltage between unified meter and A/C amp. harness connector M66 terminal 14 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace unified meter and A/C amp.

4.

CHECK COMBINATION METER OUTPUT VOLTAGE

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Connect combination meter connector.

4.

Turn ignition switch ON.

5.

Check voltage between combination meter harness connector M53 terminal 25 and ground.

DTC

Display contents of 

CONSULT-III

Diagnostic item is detected when ...

Probable malfunction location

B2201

COMM ERROR 1

If a communication error is present in the 
communication line (LCD <-> AMP.) for 2 sec-
onds or more

Communication line (LCD <-> AMP.) circuit

24 - 14

: Continuity should exist.

25 - 34

: Continuity should exist.

24, 25 - Ground

: Continuity should not exist.

14 - Ground

: Approx 12 V