Nissan Murano Z50 (2003 year). Manual - part 76

UNIFIED METER AND A/C AMP

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Input/output signal chart

T: Transmit   R: Receive

Signals

ECM

TCM

Low 

tire 

pres-

sure 

warn-

ing 

con-

trol 

unit

Dis-
play 

unit

Dis-
play 

con-

trol 

unit

BCM

Uni-

fied 

meter 

and A/

C 

amp.

Driver 

seat 
con-

trol 

unit

AWD 

con-

trol 

unit

ABS 

actua-

tor 

and 

elec-

tric 

unit 

(con-

trol 

unit)

IPDM 

E/R

CVT position indicator signal

T

R

Second position signal 

R

T

Second position indicator signal

T

R

Engine speed signal

T

R

R

R

R

R

R

Engine status signal

T

R

Engine coolant temperature signal

T

R

Accelerator pedal position signal 

T

R 

R

Closed throttle position signal

T

R 

Wide open throttle position signal

T

R 

Key switch signal

 

T

R

Ignition switch signal

 

T

R

R

P range signal

T 

R

Stop lamp switch signal

R

T

R

Fuel consumption monitor signal

T

R

CVT self-diagnosis signal

R

T

ABS operation signal

R

R

T

Air conditioner switch signal

R

T

A/C compressor request signal

T

R

A/C compressor feedback signal

T

R

Blower fan motor switch signal

R

T

A/C control signal

T

T

R

R

R

T

Cooling fan speed request signal

T

R

Position lights request signal

T

R

R

Low beam request signal

T

R

Low beam status signal

R

T

High beam request signal

T

R

R

High beam status signal

R

T

Front fog lights request signal

T

R

Vehicle speed signal

R

R

R

T

R

R

R

R

T

R

Sleep request 1 signal

T

R

Sleep request 2 signal

T

R

Door switch signal

R

T

R

R

T

R

R

R

Key fob ID signal

T

R

Key fob door unlock signal

T

R

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UNIFIED METER AND A/C AMP

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Turn indicator signal

T

R

Seat belt buckle switch signal

R

T

Oil pressure switch signal

R

T

T

R

Buzzer output signal

T

R

Fuel level sensor signal

R

T

Fuel level low warning signal

R

R

T

Malfunction indicator lamp signal

T

R

ASCD SET lamp signal

T

R

ASCD CRUISE lamp signal

T

R

Input shaft revolution signal

R

T

Output shaft revolution signal

R

T

Front wiper request signal

T

R

Front wiper stop position signal

R

T

Rear window defogger switch signal

T

R

Rear window defogger control signal

R

R

R

T

Engine and CVT integrated control 
signal

T

R

R

T

Hood switch signal

R

T

Theft warning horn request signal

T

R

Horn chirp signal

T

R

Tire pressure signal

T

R

Tire pressure data signal

T

R

R

ABS warning lamp signal

R

T

Brake warning lamp signal

R

T

System setting signal

T

T

R

AWD warning lamp signal

R

T

AWD lock indicator lamp signal

R

T

AWD lock switch signal

T

R

Parking brake switch signal

R

T

R

Signals

ECM

TCM

Low 

tire 

pres-

sure 

warn-

ing 

con-

trol 

unit

Dis-
play 

unit

Dis-
play 

con-

trol 

unit

BCM

Uni-

fied 

meter 

and A/

C 

amp.

Driver 

seat 
con-

trol 

unit

AWD 

con-

trol 

unit

ABS 

actua-

tor 

and 

elec-

tric 

unit 

(con-

trol 

unit)

IPDM 

E/R

UNIFIED METER AND A/C AMP

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TYPE 25/TYPE26/TYPE 27/TYPE 28/TYPE 29/TYPE 30/TYPE 31/TYPE 32
System Diagram

●

Type25

●

Type26

●

Type27

SKIA4926E

SKIA4927E

SKIA4928E

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●

Type28

●

Type29

●

Type30

SKIA4929E

SKIA4930E

SKIA4931E

UNIFIED METER AND A/C AMP

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●

Type31

●

Type32

SKIA4932E

SKIA4933E

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Input/output Signal Chart

T: Transmit   R: Receive

Signals

ECM

TCM

Low 

tire 

pres-

sure 

warn-

ing 

con-

trol 

unit

Dis-
play 

unit

Dis-
play 

con-

trol 

unit

BCM

Uni-

fied 

meter 

and 
A/C 

amp.

Steer

ing 

angle 

sen-

sor

Drive

r seat 

con-

trol 

unit

AWD 

con-

trol 

unit

ABS 

actu-

ator 
and 

elec-

tric 

unit 

(con-

trol 

unit)

IPDM 

E/R

Engine and CVT integrated control 
signal

T

R

R

T

Second position signal 

R

T

VDC operation signal

R

R

T

Stop lamp switch signal

R

T

R

Key switch signal

T

R

Ignition switch signal

T

R

R

P range signal

T

R

R

Closed throttle position signal

T

R 

Wide open throttle position signal

T

R 

Second position indicator signal

T

R

R

Engine speed signal

T

R

R

R

R

R

R

Engine status signal

T

R

Engine coolant temperature signal

T

R

Accelerator pedal position signal 

T

R

R

R

Fuel consumption monitor signal

T

R

CVT self-diagnosis signal

R

T

Input shaft revolution signal

R

T

R

Output shaft revolution signal

R

T

R

Air conditioner switch signal

R

T

A/C compressor request signal

T

R

A/C compressor feedback signal

T

R

T

Blower fan motor switch signal

R

T

A/C control signal

T

T

R

R

R

T

Cooling fan speed request signal

T

R

Position lights request signal

T

R

R

Low beam request signal

T

R

Low beam status signal

R

T

High beam request signal

T

R

R

High beam status signal

R

T

Front fog lights request signal

T

R

Vehicle speed signal

R

R

R

T

R

R

R

R

T

R

Sleep request 1 signal

T

R

Sleep request 2 signal

T

R

UNIFIED METER AND A/C AMP

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Door switch signal

R

T

R

R

T

R

R

R

Turn indicator signal

T

R

Key fob ID signal

T

R

Key fob door unlock signal

T

R

Seat belt buckle switch signal

R

T

Oil pressure switch signal

R

T

T

R

Buzzer output signal

T

R

Fuel level sensor signal

R

T

Fuel level low warning signal

R

R

T

Malfunction indicator signal

T

R

ASCD SET lamp signal

T

R

ASCD CRUISE lamp signal

T

R

Front wiper request signal

T

R

Front wiper stop position signal

R

T

Rear window defogger switch signal

T

R

Rear window defogger control signal

R

R

R

T

Hood switch signal

R

T

Theft warning horn request signal

T

R

Horn chirp signal

T

R

Steering angle sensor signal

T

R

Tire pressure signal

T

R

Tire pressure data signal

T

R

R

CVT position indicator signal

T

R

R

ABS warning lamp signal

R

T

VDC OFF indicator lamp signal

R

T

SLIP indicator lamp signal

R

T

Brake warning lamp signal

R

T

System setting signal

T

T

R

AWD warning lamp signal

R

T

AWD lock indicator lamp signal

R

T

AWD lock switch signal

T

R

Parking brake switch signal

R

T

R

Signals

ECM

TCM

Low 

tire 

pres-

sure 

warn-

ing 

con-

trol 

unit

Dis-
play 

unit

Dis-
play 

con-

trol 

unit

BCM

Uni-

fied 

meter 

and 
A/C 

amp.

Steer

ing 

angle 

sen-

sor

Drive

r seat 

con-

trol 

unit

AWD 

con-

trol 

unit

ABS 

actu-

ator 
and 

elec-

tric 

unit 

(con-

trol 

unit)

IPDM 

E/R

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UNIFIED METER AND A/C AMP

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Schematic

AKS005L0

TKWA0926E

UNIFIED METER AND A/C AMP

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CONSULT-II Function

AKS004GR

CONSULT-II executes the following functions by combining data reception and command transmission via the
communication line from unified meter and A/C amp. Self-diagnostic results and data monitor display.

CONSULT-II BASIC OPERATION

CAUTION:

If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.

1.

With the ignition switch OFF, connect “CONSULT-II” and “CON-
SULT-II CONVERTER” to the data link connector, then turn igni-
tion switch ON.

2.

Touch “START (NISSAN BASED VHCL)”.

3.

Touch “METER A/C AMP” on “SELECT SYSTEM” screen. If
“METER A/C AMP” is not indicated, go to 

GI-38, "CONSULT-II

Data Link Connector (DLC) Circuit"

 .

4.

Select “SELF-DIAG RESULTS”, “CAN DIAG SUPPORT MNTR”
or “DATA MONITOR”. 

System part

Check item, diagnosis mode

Description

METER A/C AMP

Self-diagnostic results

Unified meter and A/C amp. check the conditions and indicates any error that 
unified meter and A/C amp. memorized.

CAN diagnostic support monitor

The results of transmit/receive diagnosis of CAN communication can be read.

Data monitor

Displays unified meter and A/C amp. input data in real time.

PBIB1300E

SAIA0450E

SKIA6338E

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SELF-DIAGNOSTIC RESULTS
Operation Procedure

1.

Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.

2.

Self-diagnosis results are displayed.

Display Item List

“TIME” indicates the condition of the self-diagnosis results judged by each signal input.

●

Normal: In case of operating properly at the present in spite of having malfunction in the past, then “TIME”
indicates “1-63”.

●

Malfunction: Soon after detecting malfunctions by self-diagnoses or current malfunction, “0” is indicated.

After returning to normal condition, every time when ignition switch is turned to “OFF” from “ON”, time will be
added like “1”

→

“2”

→

“3”···“63”, and when the key operation is performed 64 times, the result of the self-diag-

noses will be erased. And if any malfunction is detected again, “0” will be indicated.

CAUTION:

“TIME” keeps showing “0” after returning to normal condition only in the case that incident history of
“CAN COMM CIRC [U1000]” remains because of low tire pressure warning control unit, display control
unit (with NAVI) or display unit (without NAVI) malfunction.

DATA MONITOR
Operation Procedure

1.

Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.

2.

Touch either “MAIN SIGNALS” or “SELECTION FROM MENU” on the “DATA MONITOR” screen.

3.

When “SELECTION FROM MENU” is selected, touch individual items to be monitored. When “MAIN SIG-
NALS” is selected, main items will be monitored.

SKIA4956E

CONSULT-ll display [Code]

Malfunction is detected when...

CAN COMM CIRC [U1000]

Malfunction is detected in CAN communication.

CAUTION:

Even when there is no malfunction on CAN communication system, malfunction may be 
misinterpreted when battery has low voltage (when maintaining 7V-8V for about 2 seconds) 
or 10A fuse [No. 19, located in the fuse block (J/B)] is disconnected.

METER COMM CIRC [B2202]

Malfunction is detected in communication of between combination meter and unified meter and A/
C amp.

VEHICLE SPEED CIRC [B2205]

When an erroneous speed signal is input for 1 seconds.

CAUTION:

Even when there is no malfunction on speed signal system, malfunction may be misinter-
preted when battery has low voltage (when maintaining 7V-8V for about 2 seconds). 

MAIN SIGNALS

Monitors main signals.

SELECTION FROM MENU

Selects and monitors individual signal.

UNIFIED METER AND A/C AMP

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4.

Touch “START”.

5.

Touch “RECORD” while monitoring, then the status of the moni-
tored item can be recorded. To stop recording, touch “STOP”.

Display Item List

SKIA4957E

Display item [Unit]

MAIN SIGNALS

SELECTION 

FROM MENU

Contents

SPEED METER [km/h] or [mph]

X

X

This is the angle correction value after the speed signal from 
the ABS actuator and electric unit (control unit) is converted 
into the vehicle speed.

SPEED OUTPUT [km/h] or [mph]

X

X

This is the angle correction value before the speed signal 
from the ABS actuator and electric unit (control unit) is con-
verted into the vehicle speed.

TACHO METER [rpm]

X

X

This is the converted value for the engine speed signal from 
the ECM.

W TEMP METER [

°

C] or [

°

F]

X

X

This is the converted value for the engine coolant tempera-
ture signal from the ECM. 

FUEL METER [lit.]

X

X

This is the processed value for the signal (resistance value) 
from the fuel gauge.

DISTANCE [km] or [mile]

X

X

This is the calculated value for the speed signal from the 
ABS actuator and electric unit (control unit), the signal (resis-
tance signal) from the fuel gauge and fuel consumption from 
ECM.

FUEL W/L [ON/OFF]

X

X

Indicates [ON/OFF] condition of low-fuel warning lamp.

MIL [ON/OFF] 

X

Indicates [ON/OFF] condition of malfunction indicator lamp.

AIR PRES W/L [ON/OFF]

X

Indicates [ON/OFF] condition of low tire pressure warning 
lamp.

SEAT BELT W/L [ON/OFF]

X

Indicates [ON/OFF] condition of seat belt warning lamp.

BUZZER [ON/OFF]

X

X

Indicates [ON/OFF] condition of buzzer.

DOOR W/L [ON/OFF]

X

Indicates [ON/OFF] condition of door warning lamp.

HI-BEAM IND [ON/OFF]

X

Indicates [ON/OFF] condition of high beam indicator.

TURN IND [ON/OFF]

X

Indicates [ON/OFF] condition of turn indicator.

OIL W/L [ON/OFF]

X

Indicates [ON/OFF] condition of oil pressure warning lamp.

VDC IND [ON/OFF]

X

Indicates [ON/OFF] condition of VDC OFF indicator lamp.

ABS W/L [ON/OFF]

X

Indicates [ON/OFF] condition of ABS warning lamp.

SLIP IND [ON/OFF]

X

Indicates [ON/OFF] condition of SLIP indicator lamp.

BRAKE W/L [ON/OFF]

X

Indicates [ON/OFF] condition of brake warning lamp.

*1

M RANGE SW [OFF

*2

 ]

X

X

—

NM RANGE SW [OFF

*2

 ]

X

X

—

AT SFT UP SW [OFF

*2

 ]

X

X

—

AT SFT DWN SW [OFF

*2

 ]

X

X

—

BRAKE SW [ON/OFF]

X

Indicates [ON/OFF] condition of brake switch (stop lamp 
switch).

AT-M IND [OFF

*2

 ]

X

X

—

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UNIFIED METER AND A/C AMP

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NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
*1: Monitor keeps indicating “OFF” when brake warning lamp is on by the parking brake operation or low brake
fluid level. 
*2: These items are always shown as “OFF” because of “No Manual Mode”.
*3: This item is always shown as “1” because of “No Manual Mode”.

Removal and Installation of Unified Meter and A/C Amp. 

AKS005F8

REMOVAL

1.

Remove the audio unit. Refer to 

AV-55, "Removal and Installa-

tion of Audio Unit"

 .

2.

Remove the fixing screws, then remove the unified meter and A/
C amp.

INSTALLATION

Installation is basically in the reverse order of removal.

AT-M GEAR [1

*3

 ]

X

X

—

P RANGE IND [ON/OFF] 

X

X

Indicates [ON/OFF] condition of CVT shift P range indicator.

R RANGE IND [ON/OFF]

X

X

Indicates [ON/OFF] condition of CVT shift R range indicator.

N RANGE IND [ON/OFF]

X

X

Indicates [ON/OFF] condition of CVT shift N range indicator.

D RANGE IND [ON/OFF]

X

X

Indicates [ON/OFF] condition of CVT shift D range indicator.

L RANGE IND [ON/OFF]

X

X

Indicates [ON/OFF] condition of CVT shift L range indicator.

CVT IND [ON/OFF]

X

Indicates [ON/OFF] condition of CVT indicator.

S RANGE IND [ON/OFF]

X

X

Indicates [ON/OFF] condition of CVT shift S range indicator.

CRUISE IND [ON/OFF]

X

Indicates [ON/OFF] condition of CRUISE indicator.

SET IND [ON/OFF]

X

Indicates [ON/OFF] condition of SET indicator.

4WD LOCK SW [ON/OFF]

X

Indicates [ON/OFF] condition of AWD lock switch.

4WD LOCK IND [ON/OFF]

X

Indicates [ON/OFF] condition of AWD lock indicator lamp.

4WD W/L [ON/OFF]

X

Indicates [ON/OFF] condition of AWD warning lamp.

Display item [Unit]

MAIN SIGNALS

SELECTION 

FROM MENU

Contents

RJIA1813E

WARNING LAMPS

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WARNING LAMPS

PFP:24814

Schematic

AKS004GS

TKWA0817E

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WARNING LAMPS

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Wiring Diagram — WARN —

AKS004GT

TKWA0818E

WARNING LAMPS

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TKWA0819E

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WARNING LAMPS

Revision; 2004 April

2003 Murano

TKWA0820E