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K ELECTRICAL

DRIVER INFORMATION SYSTEM
SECTION DI B

E
CONTENTS
PRECAUTION ........................................................... 3 . Engine Oil Pressure Signal Inspection .................. 19 . F
Precautions for Supplemental Restraint System Water Temperature Signal Inspection ................... 20 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Engine Speed Signal Inspection ............................ 20 .
SIONER" ................................................................. 3
. Fuel Level Sensor Unit Inspection ......................... 20 . G
COMBINATION METERS .......................................... 4 . FUEL LEVEL SENSOR UNIT ............................ 20 .
Component Parts and Harness Connector Location 4 ..... LOW-FUEL WARNING LAMP ............................ 20 .
System Description ................................................. 4 . Fuel Gauge Fluctuates, Indicates Wrong Value, or
H
UNIFIED METER CONTROL UNIT ..................... 4 . Varies ..................................................................... 22
.
POWER SUPPLY AND GROUND CIRCUIT ....... 5 . Fuel Gauge Does Not Move to Full-position .......... 22 .
WATER TEMPERATURE GAUGE ....................... 5 . DTC [U1000] CAN Communication Circuit ............ 23 .
ENGINE OIL PRESSURE GAUGE ...................... 5 . DTC [B2205] Vehicle Speed Circuit ....................... 23 . I
VOLTAGE GAUGE ............................................... 5 . Electrical Components Inspection ......................... 23 .
TACHOMETER .................................................... 5 . FUEL LEVEL SENSOR UNIT CHECK ............... 23 .
FUEL GAUGE ...................................................... 5 . OIL PRESSURE SWITCH CHECK .................... 23 . J
SPEEDOMETER .................................................. 5 . Removal and Installation ....................................... 23 .
ODO/TRIP METER .............................................. 5 . COMBINATION METER ..................................... 23 .
CAN COMMUNICATION SYSTEM DESCRIP- WARNING LAMPS ................................................... 24 .
DI
TION ..................................................................... 5
. Schematic .............................................................. 24
.
Arrangement of Combination Meter ........................ 6 . Wiring Diagram -- WARN -- ................................. 25 .
Internal Circuit ......................................................... 7
. Oil Pressure Warning Lamp Stays Off (Ignition
Wiring Diagram -- METER -- ................................. 8 . Switch ON) ............................................................ 31
. L
Combination Meter Harness Connector Terminal Oil Pressure Warning Lamp Does Not Turn Off (Oil
Layout ................................................................... 10
. Pressure Is Normal) ............................................... 31 .
Terminals and Reference Values for Combination A/T INDICATOR ....................................................... 32 . M
Meter ..................................................................... 10
. Wiring Diagram -- AT/IND -- ................................ 32 .
Self-Diagnosis Mode of Combination Meter ...........11 . A/T Indicator Does Not Illuminate .......................... 33 .
SELF-DIAGNOSIS FUNCTION ..........................11 . WARNING CHIME .................................................... 34 .
HOW TO INITIATE COMBINATION METER Component Parts and Harness Connector Location 34 ...
SELF-DIAGNOSIS MODE ..................................11 . System Description ................................................ 34 .
COMBINATION METER SELF-DIAGNOSIS FUNCTION ......................................................... 34 .
MODE FUNCTIONS ...........................................11 . LIGHT WARNING CHIME .................................. 35 .
CONSULT-II Function (METER) ............................ 15 . IGNITION KEY WARNING CHIME .................... 35 .
CONSULT-II START PROCEDURE ................... 15 . SEAT BELT WARNING CHIME .......................... 35 .
SELF-DIAGNOSTIC RESULTS ......................... 15 . CAN Communication System Description ............. 35 .
DATA MONITOR ................................................ 15 . Wiring Diagram -- CHIME -- ................................ 36 .
How to Proceed With Trouble Diagnosis ............... 17 . Terminals and Reference Values for BCM ............. 38 .
Preliminary Check ................................................. 17 . Terminals and Reference Values for Combination
Symptom Chart ..................................................... 18 . Meter ..................................................................... 38
.
Power Supply and Ground Circuit Inspection ....... 18 . How to Proceed With Trouble Diagnosis ............... 38 .
Vehicle Speed Signal Inspection ........................... 19 . Preliminary Check ................................................. 38 .

Revision: September 2006 DI-1 2007 Xterra
INSPECTION FOR POWER SUPPLY AND System Description ................................................46
.
GROUND CIRCUIT ............................................ 38 . FUNCTION .........................................................46
.
CONSULT-II Function (BCM) ................................. 39 . DTE (DISTANCE TO EMPTY) INDICATION .......46 .
CONSULT-II START PROCEDURE ................... 39 . TRIP DISTANCE .................................................46.
DATA MONITOR ................................................. 39 . TRIP TIME ..........................................................46
.
ACTIVE TEST .................................................... 39 . AVERAGE FUEL CONSUMPTION .....................46 .
SELF-DIAGNOSTIC RESULTS .......................... 39 . AVERAGE VEHICLE SPEED .............................46 .
All Warning Chimes Do Not Operate ..................... 40 . HOW TO CHANGE/RESET INDICATION ..........46 .
Key Warning Chime and Light Warning Chime Do CAN Communication System Description .............46 .
Not Operate (Seat Belt Warning Chime Does Oper- Wiring Diagram -- B/COMP -- ..............................47 .
ate) ........................................................................ 40
. Trouble Diagnoses .................................................48
.
Key Warning Chime Does Not Operate ................. 41 . SEGMENT CHECK .............................................48 .
Light Warning Chime Does Not Operate ............... 43 . PRELIMINARY CHECK ......................................48 .
Seat Belt Warning Chime Does Not Operate ........ 44 . DIAGNOSIS PROCEDURE ................................48 .
BOARD COMPUTER ............................................... 46 .

Revision: September 2006 DI-2 2007 Xterra
PRECAUTION

PRECAUTION PFP:00011
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS00DCY

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
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 C
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: D
G 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. E
G 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. F
G 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.
G

Revision: September 2006 DI-3 2007 Xterra
COMBINATION METERS

COMBINATION METERS PFP:24814

Component Parts and Harness Connector Location EKS00DD0

WKIA5727E

1. Combination meter M24 2. Fuel level sensor unit and fuel pump 3. ECM E16 (view with ECM cover
C5 (view with fuel tank removed) removed)
A. Coolant reservoir
4. ABS actuator and electric unit (con- 5. Oil pressure switch E208 6. IPDM E/R E122
trol unit) E125 A. Oil pan (upper)

System Description EKS00DD1

UNIFIED METER CONTROL UNIT
G Speedometer, odometer, tachometer, fuel gauge, oil pressure gauge, voltage gauge, and water tempera-
ture gauge are controlled by the unified meter control unit, which is built into the combination meter.
G Warning indicators are controlled by signals drawn from the CAN communication system, BCM (body con-
trol module), and components connected directly to the combination meter.
G Digital meter is adopted for odometer/trip meters*, as well as the A/T position indicator display.
*The record of the odometer is kept even if the battery cable is disconnected.
G Odometer/trip meters and A/T indicator segments can be checked in diagnosis mode.
G Meters/gauges can be checked in diagnosis mode.
NOTE:
Under the following conditions, the meters will perform a homing function. The meter pointers will move down
slightly and then move back to the resting position. This is a normal design condition.
G Approximately 60 seconds after turning the ignition switch from the ON to the OFF position
G If the battery is disconnected and then reconnected
Illumination control
The unified meter control unit outputs the speedometer, odometer/trip meters, tachometer, oil pressure gauge,
voltage gauge, A/T indicator, fuel and temperature gauge lighting when the ignition switch is turned on. When
the lighting switch is turned on, the illumination control switch can be used to adjust the brightness of the com-
bination meter illumination and the odometer/trip meters and meter illumination.

Revision: September 2006 DI-4 2007 Xterra
COMBINATION METERS

POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times A
G through 10A fuse [No.19, located in the fuse block (J/B)]
G to combination meter terminal 3.
B
With the ignition switch in the ON or START position, power is supplied
G through 10A fuse [No.14, located in the fuse block (J/B)]
G to combination meter terminal 16. C
Ground is supplied
G to combination meter terminals 13 and 23
G through body grounds M57, M61 and M79. D
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM provides an engine coolant temperature signal to combination meter via CAN communication lines. E

ENGINE OIL PRESSURE GAUGE
The engine oil pressure gauge indicates whether the engine oil pressure is low or normal. F
The oil pressure gauge is controlled by the IPDM E/R (intelligent power distribution module engine room). Low
oil pressure causes oil pressure switch terminal 1 to provide ground to IPDM E/R terminal 42. The IPDM E/R
then signals the combination meter (unified meter control unit) via CAN communication lines and a low oil
pressure indication is displayed by the oil pressure gauge. G

VOLTAGE GAUGE
The voltage gauge indicates the battery/charging system voltage. H
The voltage gauge is regulated by the unified meter control unit.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm). I
ECM provides an engine speed signal to combination meter via CAN communication lines.
FUEL GAUGE
J
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by the unified meter control unit and a variable resistor signal supplied
G to combination meter terminal 9
DI
G through fuel level sensor unit and fuel pump terminal 2
G through fuel level sensor unit and fuel pump terminal 5
G from combination meter terminal 4. L
SPEEDOMETER
ABS actuator and electric unit (control unit) provides a vehicle speed signal to the combination meter via CAN
communication lines. M
ODO/TRIP METER
The vehicle speed signal and the memory signals from the meter memory circuit are processed by the combi-
nation meter and the mileage is displayed.
How to Change the Display
Refer to Owner's Manual for odo/trip meter operating instructions.
CAN COMMUNICATION SYSTEM DESCRIPTION
Refer to LAN-4, "SYSTEM DESCRIPTION" .

Revision: September 2006 DI-5 2007 Xterra
COMBINATION METERS

Arrangement of Combination Meter EKS00DD2

WKIA4987E

Revision: September 2006 DI-6 2007 Xterra
COMBINATION METERS

Internal Circuit EKS00DD3

WKWA5356E

Revision: September 2006 DI-7 2007 Xterra
COMBINATION METERS

Wiring Diagram -- METER -- EKS00DD4

WKWA5357E

Revision: September 2006 DI-8 2007 Xterra
COMBINATION METERS

WKWA5358E

Revision: September 2006 DI-9 2007 Xterra
COMBINATION METERS

Combination Meter Harness Connector Terminal Layout EKS00IZV

LKIA0698E

Terminals and Reference Values for Combination Meter EKS00DD5

Condition
Terminal Wire Reference value (V)
Item Ignition
No. color Operation or condition (Approx.)
switch
3 R/Y Battery power supply OFF -- Battery voltage
4 B/Y Fuel level sensor ground ON -- 0
Refer to DI-20, "Fuel Level Sensor
9 BR Fuel level sensor signal -- --
Unit Inspection" .
11 P CAN-L -- -- --
12 L CAN-H -- -- --
13 GR Ground -- -- 0
Ignition switch ON or
16 W/G ON -- Battery voltage
START
Refer to LT-126, "ILLUMINATION
22 BR Illumination control switch -- Lighting switch ON OPERATION BY LIGHTING
SWITCH" .
23 B Ground -- -- 0

Seat belt buckle switch Unfastened (ON) 0
24 V ON
LH Fastened (OFF) Battery voltage

DIFF LOCK indicator DIFF LOCK indicator ON 0
25 SB OFF
input DIFF LOCK indicator OFF Battery voltage
Parking brake applied 0
31 G Parking Brake switch ON
Parking brake released Battery voltage
Brake fluid level low 0
32 SB Brake fluid level switch ON
Brake fluid level normal Battery voltage
Brake pedal depressed Battery voltage
33 LG Stop lamp switch ON
Brake pedal released 0
Washer fluid level low 0
34 L Washer fluid level switch ON
Washer fluid level normal Battery voltage
Security indicator ON 0
39 G Security indicator input OFF
Security indicator OFF Battery voltage

Seat belt buckle switch Unfastened (ON) 0
40 LG ON
RH Fastened (OFF) Battery voltage

Revision: September 2006 DI-10 2007 Xterra
COMBINATION METERS

Self-Diagnosis Mode of Combination Meter EKS00DD6

SELF-DIAGNOSIS FUNCTION A
The following items can be checked during Combination Meter Self-Diagnosis Mode.
G Gauge sweep and present gauge values.
B
G Illuminates all odometer/trip meters and A/T indicator segments.
G Illuminates all micro controlled lamps/LEDs regardless of switch position.
G Displays estimated present battery voltage.
C
G Displays seat belt buckle switch LH status.
HOW TO INITIATE COMBINATION METER SELF-DIAGNOSIS MODE
NOTE: D
Once entered, Combination Meter Self-Diagnosis Mode will function with the ignition switch in ON or START.
Combination Meter Self-Diagnosis Mode will exit upon turning the ignition switch to OFF or ACC.
To initiate Combination Meter Self-Diagnosis Mode, refer to the following procedure. E
1. Turn the ignition switch ON, while pressing the odometer/trip meter switch for 5 - 8 seconds. When the
diagnosis function is activated, the odometer/trip meter will display tESt.
NOTE: F
Check combination meter power supply and ground circuit when self-diagnosis mode of combination
meter does not start. Refer to DI-18, "Power Supply and Ground Circuit Inspection" . Replace combination
meter if normal. Refer to IP-13, "COMBINATION METER" .
G
COMBINATION METER SELF-DIAGNOSIS MODE FUNCTIONS
To interpret Combination Meter Self-Diagnosis Mode functions, refer to the following table.
H
Event Odometer Display Description of Test/Data Notes:
Odometer/trip meter A/B
switch held from 5 to 8
tESt Initiating self-diagnosis mode I
seconds (or until
released)
Performs sweep of all
gauges, then displays
Gauges sweep within 10 sec-
J
Next test requested GAGE present gauge values.
onds
Performs checksum tests
on ROM and EE.
DI
Lights all odometer/trip Initiating self-diagnosis mode
Next test requested (All segments illuminated)
meter segments. complete
Illuminates all micro-con-
trolled lamps/LEDs L
Next test requested bulb
regardless of SW configu-
ration.
Return to normal opera- M
tion of all lamps/LEDs and
Odometer/trip meter A/B
displays hex ROM rev. If
switch engaged and
rXXXX, FAIL a ROM checksum fault
released = next test
exists, display alternates
requested
between "r XXXX" and
"FAIL".
Displays hex ROM rev as
Next test requested nrXXXX
stored in NVM.
Hex EE level. If EE
checksum fault exists,
Next test requested EE XX, FAIL display alternates
between "EE XX" and
"FAIL".
Hex coding of final manu-
Next test requested dtXXXX
facturing test date.

Revision: September 2006 DI-11 2007 Xterra
COMBINATION METERS

Event Odometer Display Description of Test/Data Notes:
Bit Coding
7-3 = reserved for future use
2 = TCS/VDC 0 = not present
Displays 8-bit software
1 = present
Next test requested Sc1XX configuration value in Hex
1 = Shift type 0 = Column shift
format.
1 = Floor shift
0 = ICC 0 = not present
1 = present
Displays 8-bit software
Bit coding
Next test requested Sc2XX configuration value in Hex
7-0 = Reserved for future use
format.
Bit Coding
7-2 = reserved for future use
Displays 8-bit software 1 = A/T Oil Temp (gauge)
Next test requested EprXX configuration value in Hex 0 = not present
format. 1 = present
1 = Odo Units 0 = kilometers
1 = miles
Displays 8-bit market info $31 = USA
Next test requested 1nFXX
value in Hex format. $2A = Canada
Displays 8-bit engine con-
$08 = 8 cylinder
Next test requested cYLXX figuration value in Hex
$06 = 6 cylinder
format.
Displays 16-bit fuel flow
Next test requested FFXXXX constant "Q" in tenths of $0000 - $FFFF
cc/min in Hex format.
Displays 16-bit tire factor
Next test requested tF "A" in hundredths in Hex $0000 - $FFFF
format.
Displays oil pressure tell-
Next test requested ot1XX tale "on" threshold in A/D $00 - $FF
counts in Hex format.
Displays oil pressure tell-
Next test requested ot0XX tale "off" threshold in A/D $00 - $FF
counts in Hex format.
Raw uncompensated
Will display "-----" if message is
english speed value in
not received. Will display
Next test requested XXXXX hundredths of MPH.
"99999" if data received is
Speedometer indicates
invalid
present speed.
Raw uncompensated
Will display "-----" if message is
metric speed value in
not received. Will display
Next test requested XXXXX hundredths of km/h.
"99999" if data received is
Speedometer indicates
invalid
present speed.
Tachometer value in
Will display "-----" if message is
Next test requested tXXXX RPM. Tachometer indi-
not received.
cates present RPM.
Present ratioed fuel level 000-009 = Short circuit
A/D input 1 in decimal for- 010-254 = Normal range
Next test requested F1 XXXX
mat. Fuel gauge indicates 255 = Open circuit
present filtered level. --- = Missing 5 seconds
Last temperature gauge
Will display "---"C if message is
input value in degrees C.
not received.
Next test requested XXXC Temperature gauge indi-
Will display "999" if data
cates present filtered tem-
received is invalid.
perature.

Revision: September 2006 DI-12 2007 Xterra
COMBINATION METERS

Event Odometer Display Description of Test/Data Notes:
A
Estimated present bat-
Next test requested BAtXX.X
tery voltage.
Seat belt buckle switch 1= Buckled
Next test requested rES -X B
LH status. 0 = Unbuckled
Next test requested PA -XX Hex value port A.
Next test requested Pb -XX Hex value port B.
C
Next test requested PE -XX Hex value port E.
Next test requested PL -XX Hex value port L.
Next test requested P6 -XX Hex value port K. D
Next test requested Pn -XX Hex value port M.
Next test requested PP -XX Hex value port P.
E
Next test requested PS -XX Hex value port S.
Next test requested Pt -XX Hex value port T.
Next test requested Pu -XX Hex value port U. F
Next test requested P4 -XX Hex value port V.
Next test requested Puu -XX Hex value port W.
A/D port A/D value (non-
G
Next test requested A00XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A01XXX 0-255 H
ratioed).
A/D port A/D value (non-
Next test requested A02XXX 0-255
ratioed).
A/D port A/D value (non- I
Next test requested A03XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A04XXX 0-255
ratioed). J
A/D port A/D value (non-
Next test requested A05XXX 0-255
ratioed).
A/D port A/D value (non- DI
Next test requested A06XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A07XXX 0-255
ratioed). L
A/D port A/D value (non-
Next test requested A08XXX 0-255
ratioed).
A/D port A/D value (non- M
Next test requested A09XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A10XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A11XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A12XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A13XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A14XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A15XXX 0-255
ratioed).
Hex value representing
Next test requested PA0-XX
state of A/D ports 0-7.

Revision: September 2006 DI-13 2007 Xterra
COMBINATION METERS

Event Odometer Display Description of Test/Data Notes:
Hex value representing
Next test requested PA1-XX
state of A/D ports 0-7.
Return to beginning of self-
Next test requested GAGE
diagnosis.

Revision: September 2006 DI-14 2007 Xterra
COMBINATION METERS

CONSULT-II Function (METER) EKS00DD7

A
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
METER diagnosis mode Description
SELF-DIAG RESULTS Displays combination meter self-diagnosis results. B
DATA MONITOR Displays combination meter input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
C
CONSULT-II START PROCEDURE
Refer to GI-38, "CONSULT-II Start Procedure" .
D
SELF-DIAGNOSTIC RESULTS
Display Item List
CONSULT-II display Malfunction E
Malfunction is detected in CAN communication lines.
CAUTION:
CAN COMM CIRC [U1000] Even when there is no malfunction on CAN communication system, malfunction may be F
misinterpreted when battery has low voltage (when maintaining 7V-8V for about 2 sec-
onds) or 10A fuse [No. 19, located in the fuse block (J/B)] is removed.
Malfunction is detected when an erroneous speed signal is input. G
VEHICLE SPEED CIRC [B2205] CAUTION:
Even when there is no malfunction on speed signal system, malfunctions may be misin-
terpreted when battery has low voltage (when maintaining 7V-8V for about 2 seconds).
H
"TIME" indicates the condition of the self-diagnosis results judged by each signal input.
G Normal: If the system is presently operating properly, but had a malfunction in the past, the time will indi-
cate "1-63". I
G Malfunction: Soon after detecting malfunctions by self-diagnoses or current malfunction, "0" is indicated.
After the system returns to normal operating condition, every time the ignition switch is cycled (turned to OFF
from ON), a value of one is added to the counter (i.e. "1""2""3"

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