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K ELECTRICAL

DRIVER INFORMATION SYSTEM
SECTION DI B

E
CONTENTS
PRECAUTION ........................................................... 3 . Vehicle Speed Signal Inspection ........................... 23 . F
Precautions for Supplemental Restraint System Engine Oil Pressure Signal Inspection .................. 23 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Water Temperature Signal Inspection ................... 25 .
SIONER" ................................................................. 3
. Engine Speed Signal Inspection ............................ 25 . G
Wiring Diagrams and Trouble Diagnosis ................. 3 . Fuel Level Sensor Unit Inspection ......................... 26 .
PREPARATION .......................................................... 4 . FUEL LEVEL SENSOR UNIT ............................ 26 .
Commercial Service Tool ........................................ 4 . LOW-FUEL WARNING LAMP ............................ 26 .
H
COMBINATION METERS .......................................... 5 . Fuel Gauge Fluctuates, Indicates Wrong Value, or
System Description ................................................. 5 . Varies ..................................................................... 27
.
UNIFIED METER CONTROL UNIT ..................... 5 . Fuel Gauge Does Not Move to Full-position .......... 28 .
POWER SUPPLY AND GROUND CIRCUIT ....... 6 . DTC [U1000] CAN Communication Circuit ............ 28 . I
WATER TEMPERATURE GAUGE ....................... 6 . DTC [B2205] Vehicle Speed Circuit ....................... 28 .
ENGINE OIL PRESSURE GAUGE ...................... 6 . Electrical Components Inspection ......................... 29 .
VOLTAGE GAUGE ............................................... 6 . FUEL LEVEL SENSOR UNIT CHECK ............... 29 . J
TACHOMETER .................................................... 6 . Removal and Installation of Combination Meter .... 29 .
FUEL GAUGE ...................................................... 6 . COMPASS AND THERMOMETER .......................... 30 .
SPEEDOMETER .................................................. 6 . System Description ................................................ 30 .
DI
CAN COMMUNICATION SYSTEM DESCRIP- OUTSIDE TEMPERATURE DISPLAY ................ 30 .
TION ..................................................................... 6
. DIRECTION DISPLAY ........................................ 30 .
Component Parts and Harness Connector Location 7 ..... Wiring Diagram -- COMPAS -- ............................ 31 .
Combination Meter .................................................. 8 . Trouble Diagnoses ................................................ 32 . L
CHECK ................................................................. 8
. PRELIMINARY CHECK FOR THERMOMETER 32 ...
Circuit Diagram ....................................................... 9
. INSPECTION/COMPASS AND THERMOME-
Wiring Diagram -- METER -- ............................... 10 . TER .................................................................... 32
. M
Terminals and Reference Value for Combination Calibration Procedure for Compass ...................... 33 .
Meter ..................................................................... 12
. CORRECTION FUNCTIONS OF COMPASS ..... 33 .
Meter/Gauge Operation and Odo/Trip Meter ........ 13 . INITIAL CORRECTION PROCEDURE FOR
SELF-DIAGNOSIS FUNCTION ......................... 13 . COMPASS .......................................................... 33 .
HOW TO INITIATE COMBINATION METER WARNING LAMPS ................................................... 34 .
SELF-DIAGNOSIS MODE ................................. 13 . Schematic .............................................................. 34
.
COMBINATION METER SELF-DIAGNOSIS Wiring Diagram -- WARN -- ................................. 35 .
MODE FUNCTIONS .......................................... 13 . Oil Pressure Warning Lamp Stays Off (Ignition
CONSULT-II Function (METER) ............................ 17 . Switch ON) ............................................................ 44
.
CONSULT-II BASIC OPERATION ...................... 17 . Oil Pressure Warning Lamp Does Not Turn Off (Oil
SELF-DIAGNOSTIC RESULTS ......................... 18 . Pressure Is Normal) ............................................... 47 .
DATA MONITOR ................................................ 18 . Component Inspection (QR25DE Models) ............ 47 .
How to Proceed With Trouble Diagnosis ............... 21 . OIL PRESSURE SWITCH .................................. 47 .
Diagnosis Flow ...................................................... 21. A/T INDICATOR ....................................................... 48 .
Power Supply and Ground Circuit Inspection ....... 22 . Wiring Diagram -- AT/IND -- ................................ 48 .
Symptom Chart ..................................................... 23 . A/T Indicator Does Not Illuminate .......................... 49 .

Revision: November 2005 DI-1 2005 Frontier
WARNING CHIME .................................................... 50 . All Warning Chimes Do Not Operate .....................60 .
Component Parts and Harness Connector Location 50 ... Key Warning Chime and Light Warning Chime Do
System Description ................................................ 51 . Not Operate (Seat Belt Warning Chime Does Oper-
FUNCTION ......................................................... 51 . ate) .........................................................................61
.
LIGHT WARNING CHIME .................................. 51 . Key Warning Chime Does Not Operate .................62 .
IGNITION KEY WARNING CHIME ..................... 51 . Light Warning Chime Does Not Operate ................64 .
SEAT BELT WARNING CHIME .......................... 52 . Seat Belt Warning Chime Does Not Operate .........65 .
CAN Communication System Description ............. 52 . BOARD COMPUTER ...............................................67 .
Wiring Diagram -- CHIME -- ................................ 53 . System Description ................................................67 .
Terminals and Reference Value for BCM ............... 55 . FUNCTION .........................................................67 .
Terminals and Reference Value for Combination DTE (DISTANCE TO EMPTY) INDICATION .......67 .
Meter ..................................................................... 56
. TRIP DISTANCE .................................................67 .
How to Proceed With Trouble Diagnosis ............... 56 . TRIP TIME ..........................................................67 .
Preliminary Check ................................................. 56 . AVERAGE FUEL CONSUMPTION .....................67 .
INSPECTION FOR POWER SUPPLY AND AVERAGE VEHICLE SPEED .............................67 .
GROUND CIRCUIT ............................................ 56 . HOW TO CHANGE/RESET INDICATION ..........67 .
CONSULT-II Function (BCM) ................................. 58 . CAN Communication System Description .............67 .
CONSULT-II BASIC OPERATION PROCEDURE Wiring Diagram -- B/COMP -- ..............................68 .
... 58 Trouble Diagnoses .................................................69 .
DATA MONITOR ................................................. 59 . SEGMENT CHECK .............................................69 .
ACTIVE TEST .................................................... 59 . PRELIMINARY CHECK ......................................69 .
SELF-DIAGNOSTIC RESULTS .......................... 60 . DIAGNOSIS PROCEDURE ................................69 .

Revision: November 2005 DI-2 2005 Frontier
PRECAUTION

PRECAUTION PFP:00011
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS00BSD

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
Wiring Diagrams and Trouble Diagnosis EKS00BSE

When you read wiring diagrams, refer to the following:
H
G Refer to GI-17, "How to Read Wiring Diagrams" .
G Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit.
When you perform trouble diagnosis, refer to the following: I
G Refer to GI-13, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" .
G Refer to GI-29, "How to Perform Efficient Diagnosis for an Electrical Incident" .
J

Revision: November 2005 DI-3 2005 Frontier
PREPARATION

PREPARATION PFP:00002

Commercial Service Tool EKS00BSF

Tool name Description
Power tool Loosening bolts and nuts.

PBIC0191E

Revision: November 2005 DI-4 2005 Frontier
COMBINATION METERS

COMBINATION METERS PFP:24814
A
System Description EKS00BSG

UNIFIED METER CONTROL UNIT
G Speedometer, odometer, tachometer, fuel gauge, oil pressure gauge, voltage gauge, and water tempera- B
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.
C
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.
D
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 E
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 F
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 G
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.
H

Revision: November 2005 DI-5 2005 Frontier
COMBINATION METERS

POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times
G through 10A fuse [No.19, located in the fuse block (J/B)]
G to combination meter terminal 3.
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.
Ground is supplied
G to combination meter terminals 13 and 23
G through body grounds M57, M61 and M79.
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.
ENGINE OIL PRESSURE GAUGE
The engine oil pressure gauge indicates the engine oil pressure.
With the ignition switch in the ON or START position, power is supplied
G through combination meter terminal 8
G to oil pressure sensor terminal 1.
Ground is supplied
G to oil pressure sensor terminal 3
G from combination meter terminal 10.
The combination meter receives the oil pressure signal from oil pressure sensor
G through oil pressure sensor terminal 2
G to combination meter terminal 19.
VOLTAGE GAUGE
The voltage gauge indicates the battery/charging system voltage.
The voltage gauge is regulated by the unified meter control unit.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
ECM provides an engine speed signal to combination meter via CAN communication lines.
FUEL GAUGE
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
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.
SPEEDOMETER
ABS actuator and electric unit (control unit) provides a vehicle speed signal to the combination meter via CAN
communication lines.
CAN COMMUNICATION SYSTEM DESCRIPTION
Refer to LAN-22, "CAN COMMUNICATION" .

Revision: November 2005 DI-6 2005 Frontier
COMBINATION METERS

Component Parts and Harness Connector Location EKS00BSH

WKIA3997E I

Revision: November 2005 DI-7 2005 Frontier
COMBINATION METERS

Combination Meter EKS00BSI

CHECK

LKIA0580E

Revision: November 2005 DI-8 2005 Frontier
COMBINATION METERS

Circuit Diagram EKS00BSJ

WKWA2827E

Revision: November 2005 DI-9 2005 Frontier
COMBINATION METERS

Wiring Diagram -- METER -- EKS00BSK

WKWA2828E

Revision: November 2005 DI-10 2005 Frontier
COMBINATION METERS

WKWA2114E

Revision: November 2005 DI-11 2005 Frontier
COMBINATION METERS

Terminals and Reference Value for Combination Meter EKS00BSL

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 -- 0V
Oil pressure sensor refer-
8 GR ON -- 5V
ence voltage
Refer to DI-26, "Fuel Level Sensor
9 BR Fuel level sensor signal -- --
Unit Inspection" .
Oil pressure sensor
10 B ON -- 0V
ground
11 P CAN-L -- -- --
12 L CAN-H -- -- --
13 GR Ground -- -- 0V
Ignition switch ON or
16 W/G ON -- Battery voltage
START
Oil pressure sensor sig-
19 W ON -- 0 - 5V
nal
Refer to LT-159, "ILLUMINATION
22 BR Illumination control switch -- Lighting switch ON OPERATION BY LIGHTING
SWITCH" .
23 B Ground -- -- 0V

Revision: November 2005 DI-12 2005 Frontier
COMBINATION METERS

Meter/Gauge Operation and Odo/Trip Meter EKS00BSM

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 holding the odometer/trip meter switch for 5 - 8 seconds.
NOTE:
If the diagnosis function is activated the odometer/trip meter will display tESt. F
COMBINATION METER SELF-DIAGNOSIS MODE FUNCTIONS
To interpret Combination Meter Self-Diagnosis Mode functions, refer to the following table.
G
Event Odometer Display Description of Test/Data Notes:
Odometer/trip meter A/B
switch held from 5 to 8 H
tESt Initiating self-diagnosis mode
seconds (or until
released)
Performs sweep of all
gauges, then displays I
Gauges sweep within 10 sec-
Next test requested GAGE present gauge values.
onds
Performs checksum tests
on ROM and EE. J
Lights all odometer/trip Initiating self-diagnosis mode
Next test requested (All segments illuminated)
meter segments. complete
Illuminates all micro-con- DI
trolled lamps/LEDs
Next test requested bulb
regardless of SW configu-
ration.
L
Return to normal opera-
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 M
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: November 2005 DI-13 2005 Frontier
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: November 2005 DI-14 2005 Frontier
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 A01XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A02XXX 0-255 H
ratioed).
A/D port A/D value (non-
Next test requested A03XXX 0-255
ratioed).
A/D port A/D value (non- I
Next test requested A04XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A05XXX 0-255
ratioed). J
A/D port A/D value (non-
Next test requested A06XXX 0-255
ratioed).
A/D port A/D value (non- DI
Next test requested A07XXX 0-255
ratioed).
A/D port A/D value (non-
Next test requested A08XXX 0-255
ratioed). L
A/D port A/D value (non-
Next test requested A09XXX 0-255
ratioed).
A/D port A/D value (non- M
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: November 2005 DI-15 2005 Frontier
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: November 2005 DI-16 2005 Frontier
COMBINATION METERS

CONSULT-II Function (METER) EKS00EMP

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 BASIC OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be D
detected in self-diagnosis depending on control unit which carries 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- E
tion switch ON.

BBIA0538E

H
2. Touch "START (NISSAN BASED VHCL)".

DI
BCIA0029E

3. Touch "METER" on "SELECT SYSTEM" screen. If "METER" is L
not indicated, go to GI-40, "CONSULT-II Data Link Connector
(DLC) Circuit" .

BCIA0030E

Revision: November 2005 DI-17 2005 Frontier
COMBINATION METERS

4. Select "SELF-DIAG RESULTS", "DATA MONITOR" or "CAN
DIAG SUPPORT MNTR".

BCIA0031E

SELF-DIAGNOSTIC RESULTS
Operation Procedure
1. Touch "SELF-DIAG RESULTS" on "SELECT DIAG MODE" screen.
2. Self-diagnosis results are displayed.

SKIA4956E

Display Item List
CONSULT-II display Malfunction
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
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.

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).

"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".
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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