Nissan Murano Z50 (2003 year). Manual — part 73
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DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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DRIVER INFORMATION SYSTEM
PRECAUTION . . . . . . . . . . . . . . . 3
COMBINATION METERS . . . . . . . . . . ... 4
System Description . . . . . . . . . . . . .. 4
Component Parts and Harness Connector Location
Combination Meter . . . . . . . . . . . . ... 8
CHECK . . . . . . . . . . . . . . . . .. 8
SELF-DIAGNOSIS FUNCTION . . . . . . .. 14
HOW TO ALTERNATE DIAGNOSIS MODE . ... 14
FUEL GAUGE . . . . . . . . . . . . . . 23
Fuel Level Sensor Signal Inspection 2 . . . . ... 24
LOW-FUEL WARNING LAMP . . . . . . . . 24
FUEL LEVEL SENSOR UNIT CHECK . . . . 29
Removal and Installation of Combination Meter . . 29
REMOVAL . . . . . . . . . . . . . . ... 29
INSTALLATION . . . . . . . . . . . . ... 29
Disassembly and Assembly of Combination Meter ... 30
DISASSEMBLY . . . . . . . . . . . . ... 30
ASSEMBLY . . . . . . . . . . . . . . . 31
UNIFIED METER AND A/C AMP . . . . . . . .. 32
System Description . . . . . . . . . . . . . 32
INPUT/OUTPUT SIGNALS . . . . . . . . . 32
FAIL-SAFE . . . . . . . . . . . . . . .. 33
CAN Communication System Description . . . .. 34
CAN Communication Unit For 2WD Models . . ... 34
CAN Communication Unit For AWD Models . . .. 45
Schematic . . . . . . . . . . . . . . . ... 56
CONSULT-II Function . . . . . . . . . . . . 57
Removal and Installation of Unified Meter and A/C
Amp. . . . . . . . . . . . . . . . . . ... 60
REMOVAL . . . . . . . . . . . . . . ... 60
INSTALLATION . . . . . . . . . . . . ... 60
DI-2
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WARNING LAMPS . . . . . . . . . . . . . 61
OIL PRESSURE SWITCH . . . . . . . . ... 71
CVT INDICATOR . . . . . . . . . . . . . ... 72
Wiring Diagram — CVTIND — . . . . . . . ... 72
CVT Indicator Does Not Illuminate . . . . . . . 74
WARNING CHIME . . . . . . . . . . . . . . 76
CAN Communication System Description . . . .. 78
CAN Communication Unit For 2WD Models . . ... 78
CAN Communication Unit For AWD Models . . .. 89
TYPE 17/TYPE 18/TYPE 19/TYPE 20/TYPE 21/
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT . . . . . . . . . . ...104
CONSULT-II Function . . . . . . . . . . ...105
DIAGNOSTIC ITEMS DESCRIPTION . . . ...105
CONSULT-II BASIC OPERATION PROCEDURE
PRECAUTION
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PRECAUTION
PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
AKS004FR
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
●
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
●
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
●
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Wiring Diagrams and Trouble Diagnosis
AKS004FT
When you read wiring diagrams, refer to the following:
●
Refer to
GI-14, "How to Read Wiring Diagrams"
●
Refer to
PG-3, "POWER SUPPLY ROUTING CIRCUIT"
for power distribution circuit.
When you perform trouble diagnosis, refer to the following:
●
Refer to
GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES"
●
Refer to
GI-26, "How to Perform Efficient Diagnosis for an Electrical Incident"
.
DI-4
COMBINATION METERS
Revision; 2004 April
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COMBINATION METERS
PFP:24814
System Description
AKS004FU
UNIFIED METER CONTROL UNIT
●
Speedometer, odo/trip meter, tachometer, fuel gauge and water temperature gauge are controlled by the
unified meter control unit, which is built into the combination meter. Unified meter control unit receives sig-
nals from unified meter and A/C amp.
●
Warning lamp and indicator lamp of combination meter are controlled by signals drawn from the unified
meter and A/C amp.
●
Digital meter is adopted for odo/trip meter.*
*The record of the odo meter is kept even if the battery cable is disconnected. The record of the trip meter
is erased when the battery cable is disconnected.
●
Odo/trip meter and CVT indicator segments can be checked in diagnosis mode.
●
Meters/gauges can be checked in diagnosis mode.
Illumination Control
The unified meter control unit outputs the odo/trip meter and CVT
indicator lighting when the ignition switch is turned on. When the
lighting switch is turned on, light on for the combination meter dial,
odo/trip meter and illumination control switch and external lighting
are output. In addition, when the lighting switch is turned on, the illu-
mination control switch on the left side of the combination meter can
be used to adjust the brightness of each light. The brightness can be
adjusted to sixteen different levels: From 0 (no lights) to 15 (maxi-
mum). Pressing the illumination control switch will brighten or darken
the lights. When the key switch is in the START position, the combi-
nation meter dial lighting and illumination control switch lighting are
turned off.
UNIFIED METER AND A/C AMP.
Refer to
in “UNIFIED METER AND A/C AMP”.
PKIA2478E
COMBINATION METERS
DI-5
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HOW TO CHANGE THE DISPLAY FOR ODO/TRIP METER
●
The vehicle speed signal and the memory signals from the meter memory circuit are processed by the
combination meter and the mileage is displayed.
●
Depressing the odo/trip meter switch toggles the mode in the following order.
●
The odo/trip meter display mode toggling and trip display reset-
ting can be identified by the amount of time that elapses from
pressing the odo/trip meter switch to releasing it.
●
When resetting with trip A displayed, only trip A display is reset
(Trip B operates the same way).
SEL175W
PKIA2480E
DI-6
COMBINATION METERS
Revision; 2004 April
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POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times
●
through 10A fuse [No. 19, located in the fuse block (J/B)]
●
to unified meter and A/C amp. terminal 21
●
through 10A fuse [No. 21, located in the fuse block (J/B)]
●
to combination meter terminal 21.
With the ignition switch in the ON or START position, power is supplied
●
through 10A fuse [No. 14, located in the fuse block (J/B)]
●
to combination meter terminal 20
●
through 10A fuse [No. 12, located in the fuse block (J/B)]
●
to unified meter and A/C amp. terminal 22.
With the ignition switch in the ON position, power is supplied
●
through 15A fuse [No. 10, located in the fuse block (J/B)], and
●
through 15A fuse [No. 11, located in the fuse block (J/B)]
●
to unified meter and A/C amp. terminal 46.
Ground is supplied
●
to combination meter terminals 22, 23 and 24, and
●
to unified meter and A/C amp. terminals 29 and 30
●
through body grounds M14 and M78.
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM provides a engine coolant temperature signal to unified meter and A/C amp. with CAN communication
line. Unified meter and A/C amp. provides a water temperature signal to combination meter for water temper-
ature gauge with communication line between unified meter and A/C amp. and combination meter.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
ECM provides an engine speed signal to unified meter and A/C amp. with CAN communication line. Unified
meter and A/C amp. provides an engine speed signal to combination meter for tachometer with communica-
tion line between unified meter and A/C amp. and combination meter.
FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by a variable ground signal supplied
●
from unified meter and A/C amp. terminal 36
●
through the fuel level sensor unit and fuel pump (main) terminals 5 and 7, and
●
through the fuel level sensor unit (sub), and
●
through the fuel level sensor unit and fuel pump (main) terminals 6 and 2
●
to unified meter and A/C amp. terminal 28 for the fuel gauge.
Unified meter and A/C amp. provides an fuel level signal to combination meter for fuel gauge with communica-
tion line between unified meter and A/C amp. and combination meter.
SPEEDOMETER
ABS actuator and electric unit (control unit) provides a vehicle speed signal to the unified meter and A/C amp.
with CAN communication line. After unified meter and A/C amp. received the vehicle speed signal, it changes
the signal to 8 pulse signal and provides the 8 pulse signal to the combination meter for the speedometer.
COMBINATION METERS
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Component Parts and Harness Connector Location
AKS004FV
PKIA2477E
DI-8
COMBINATION METERS
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Combination Meter
AKS004FW
CHECK
PKIA2479E
COMBINATION METERS
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Circuit Diagram
AKS004FX
TKWA0814E
DI-10
COMBINATION METERS
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Wiring Diagram — METER —
AKS004FY
TKWA1157E
COMBINATION METERS
DI-11
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TKWA0816E
DI-12
COMBINATION METERS
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Terminals and Reference Value for Combination Meter
AKS004FZ
Terminal
No.
Wire
color
Item
Measuring condition
Reference value (V)
Ignition
switch
Operation or condition
14
V/W
Vehicle speed signal (8-pulse)
ON
Speedometer operated
[When vehicle speed is
approx. 40 km/h (25 MPH)]
15
R/W
Illumination signal
ON
Lighting switch ON, then
operate the illumination
control switch.
<e.g.> When brightness level is midway.
Lighting switch OFF
Approx. 0
18
R/L
TX communication line (To
unified meter and A/C amp.)
ON
—
19
R/B
RX communication line (From
unified meter and A/C amp.)
ON
—
20
O
Ignition switch ON or START
ON
—
Battery voltage
21
Y/R
Battery power supply
OFF
—
Battery voltage
22
B
Ground
ON
—
Approx. 0
23
24
27
—
Illumination control switch (+)
—
—
Refer to
DI-27, "Odo/Trip Meter and Illu-
mination Control Switch Inspection"
.
28
—
Illumination control switch (–)
—
—
29
—
Odo/trip meter switch
—
—
30
—
Odo/trip meter and illumination
control switch ground
—
—
PKIA1935E
SKIA5872E
SKIA3361E
SKIA3362E
COMBINATION METERS
DI-13
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Terminals and Reference Value for Unified Meter and A/C Amp.
AKS004G0
Terminal
No.
Wire
color
Item
Measuring condition
Reference value (V)
Ignition
switch
Operation or condition
1
L
CAN H
—
—
—
9
R/B
TX communication line (To
combination meter)
ON
—
11
Y
CAN L
—
—
—
19
R/L
RX communication line (From
combination meter)
ON
—
21
Y/R
Battery power supply
OFF
—
Battery voltage
22
G
Ignition switch ON or START
ON
—
Battery voltage
26
V/W
Vehicle speed signal (8-pulse)
ON
Speedometer operated
[When vehicle speed is
approx. 40 km/h (25 MPH)]
28
G/B
Fuel level sensor signal
—
—
Refer to
29
B
Ground (For power)
ON
—
Approx. 0
30
B
Ground
ON
—
Approx. 0
36
B/W
Fuel level sensor signal
ground
—
—
—
46
W/L
Ignition switch ON
ON
—
Battery voltage
SKIA3362E
SKIA3361E
PKIA1935E
DI-14
COMBINATION METERS
Revision; 2004 April
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Meter/Gauge Operation and Odo/Trip Meter
AKS004G1
SELF-DIAGNOSIS FUNCTION
●
Odo/trip meter segment and CVT indicator segment operation can be checked in self-diagnosis mode.
●
Meters/gauges can be checked in self-diagnosis mode.
HOW TO ALTERNATE DIAGNOSIS MODE
1.
Turn ignition switch ON, and switch the odo/trip meter to “trip A” or “trip B”.
NOTE:
If the diagnosis function is activated with the trip meter A displayed, the mileage on the trip meter A will
indicate 0000.0 miles, but the actual trip mileage will be retained. (Trip B operates the same way.)
2.
Turn ignition switch OFF.
3.
While pushing the odo/trip meter switch, turn ignition switch ON
again.
4.
Make sure the trip meter displays “0000.0”.
5.
Push the odo/trip meter switch at least 3 times. (Within 7 sec-
onds after the ignition switch is turned ON.)
6.
All the segments on the odo/trip meter and CVT indicator illuminate, and simultaneously the low-fuel
warning lamp indicator illuminates. At this time, the unified meter control unit is turned to diagnosis mode.
7.
Push the odo/trip meter switch. Each meter/gauge should indi-
cate as shown in the figure while pushing odo/trip meter switch.
(At this time, the low-fuel warning lamp goes off.)
CONSULT-II Function
AKS004G2
Refer to
in “UNIFIED METER AND A/C AMP”.
PKIA2480E
SKIA4428E
PKIA2482E
COMBINATION METERS
DI-15
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How to Proceed With Trouble Diagnosis
AKS004G3
1.
Confirm the symptom or customer complaint.
2.
Perform diagnosis according to diagnosis flow. Refer to
3.
According to the symptom chart, repair or replace the cause of the symptom.
4.
Does the meter operate normally? If so, go to 5. If not, go to 2.
5.
INSPECTION END
Diagnosis Flow
AKS004G4
1.
CHECK SELF-DIAGNOSTIC RESULTS OF UNIFIED METER AND A/C AMP.
1.
Start engine.
2.
Select “METER A/C AMP” on CONSULT-II, and perform self-diagnosis of unified meter and A/C amp.
Refer to
3.
After erasing the self-diagnosis result, perform self-diagnosis again.
Self-diagnostic results content
No malfunction detected>>GO TO 2.
Malfunction detected>> Go to
2.
CHECK WARNING LAMP ILLUMINATION
1.
Turn ignition switch ON.
2.
Make sure warning lamps (such as malfunction indicator lamp and oil pressure warning lamp) illuminate.
Do warning lamps illuminate?
YES
>> GO TO 3.
NO
>> Check ignition power supply system of combination meter. Refer to
.
3.
CHECK SELF-DIAGNOSIS OPERATION OF COMBINATION METER
Perform combination meter self-diagnosis. Refer to
DI-14, "SELF-DIAGNOSIS FUNCTION"
Does self-diagnosis function operate?
YES
>> GO TO 4.
NO
>> Check the following.
●
Battery power supply of combination meter and ground circuit. Refer to
and Ground Circuit Inspection"
●
Odo/trip meter switch. Refer to
DI-27, "Odo/Trip Meter and Illumination Control Switch Inspec-
4.
CHECK ODO/TRIP METER OPERATION
Check segment display status of odo/trip meter.
Is the display normal?
YES
>> GO TO 5.
NO
>> Replace combination meter.
SEL176W
DI-16
COMBINATION METERS
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5.
CHECK LOW-FUEL WARNING LAMP ILLUMINATION CONFIRMATION
During low-fuel warning lamp check, confirm illumination of low-fuel warning lamp.
OK or NG
OK
>> GO TO 6.
NG
>> Replace combination meter.
6.
CHECK COMBINATION METER CIRCUIT
Check indication of each meter/gauge in self-diagnosis mode.
OK or NG
OK
>> Go to
NG
>> Replace combination meter.
Power Supply and Ground Circuit Inspection
AKS004G5
1.
CHECK FUSE
Check for blown combination meter and unified meter and A/C amp. fuses.
DI-10, "Wiring Diagram — METER —"
.
OK or NG
OK
>> GO TO 2.
NG
>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to
3, "POWER SUPPLY ROUTING CIRCUIT"
Condition of odo/trip meter switch
Low-fuel warning lamp
Pushed
Does not illuminate.
Released
Illuminates.
PKIA2482E
Unit
Power source
Fuse No.
Combination meter
Battery
21
Unified meter and A/C amp.
Battery
19
Combination meter
Ignition switch ON or START
14
Unified meter and A/C amp.
Ignition switch ON or START
12
Ignition switch ON
10, 11
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