2005 NISSAN NAVARA light

EC-28
ON BOARD DIAGNOSTIC (OBD) SYSTEM
lIf the battery is disconnected, the emission-related diagnostic information will be lost within 24
hours.
lThe following data are cleared when the ECM memory is erased.
–Diagnostic trouble codes
–Freeze frame data
–Fuel pump learning value
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all
of the data listed above, are cleared from the ECM memory during work procedures.
Freeze Frame DataEBS01KCP
The ECM records the driving conditions such as calculated load value, engine coolant temperature, engine
speed, vehicle speed and intake manifold pressure at the moment a malfunction is detected.
The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II. For
details, seeEC-28, "
Freeze Frame Data".
Only one set of freeze frame data can be stored in the ECM. If freeze frame data is stored in the ECM memory
and another freeze frame data occurs later, the first (original) freeze frame data remains unchanged in the
ECM memory.
Freeze frame data (along with the DTCs) are cleared when the ECM memory is erased. Procedures for clear-
ing the ECM memory are described inEC-27, "
HOW TO ERASE DTC".
NATS (Nissan Anti-theft System)EBS01KCQ
lIf the security indicator lights up with the ignition switch in
the ON position or "NATS MALFUNCTION" is displayed on
"SELF-DIAG RESULTS" screen, perform self-diagnostic
results mode with CONSULT-II using NATS program card.
Refer toBL-170, "
NATS(Nissan Anti-Theft System)".
lConfirm no self-diagnostic results of NATS is displayed
before touching "ERASE" in "SELF-DAIG RESULTS" mode
with CONSULT-II.
lWhen replacing ECM, initialization of NATS system and reg-
istration of all NATS ignition key IDs must be carried out
with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner.
Regarding the procedure of NATS initialization and NATS ignition key ID registration, refer to CON-
SULT-II operation manual, NATS.
Malfunction Indicator (MI)EBS01KCR
DESCRIPTION
The MI is located on the combination meter.
1. The MI will light up when the ignition switch is turned ON without
the engine running. This is a bulb check.
lIf the MI does not light up, refer toEC-354, "MI&DATA LINK
CONNECTORS".
2. When the engine is started, the MI should go off.
If the MI remains on, the on board diagnostic system has
detected an engine system malfunction.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following three functions.
SEF543X
SAT652J

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-29
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EC
HOWTOSWITCHDIAGNOSTICTESTMODE
NOTE:
lIt is better to count the time accurately with a clock.
lIt is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.
lAlways ECM returns to Diagnostic Test Mode I after ignition switch is turned OFF.
How to Set Diagnostic Test Mode II (Self-diagnostic Results)
1. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
2. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the MI starts
blinking.
4. Fully release the accelerator pedal.
ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).
Diagnostic Test
ModeKEY and ENG.
Statu sFunction Explanation of Function
Mode I Ignition switch in
ON position
Engine stoppedBULB CHECK This function checks the MI bulb for damage (blown, open
circuit, etc.).
If the MI does not come on, check MI circuit. (SeeEC-354,
"MI&DATA LINK CONNECTORS".)
Engine running MALFUNCTION
WARNINGThis is a usual driving condition. When ECM detects a mal-
function, the MI will light up to inform the driver that a mal-
function has been detected.
Mode II Ignition switch in
ON position
Engine stoppedSELF-DIAGNOSTIC
RESULTSThis function allows DTCs to be read.
PBIB0092E

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-31
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Relationship Between MI, DTC, CONSULT-II and Driving PatternsEBS01KCS
*1: When a malfunction is detected, MI
will light up.*2: MI will not light up after ignition
switch is turned OFF.*3: When a malfunction is detected for
the first time, the DTC will be stored
in ECM.
*4: Other screens except SELF-DIAG-
NOSTIC RESULTS & DATA MONI-
TOR (AUTO TRIG) cannot display
the malfunction. DATA MONITOR
(AUTO TRIG) can display the mal-
function at the moment it is detected.*5: The DTC will not be displayed any
longer after vehicle is driven 40 times
(Driving pattern A) without the same
malfunction. (The DTC still remain in
ECM.)
MBIB0622E

EC-38
TROUBLE DIAGNOSIS
Basic Inspection
EBS01KCV
Precaution:
Perform Basic Inspection without electrical or mechanical loads applied;
lHeadlamp switch is OFF.
lOn vehicles equipped with daytime light systems, set lighting switch to the 1st position to light
only small lamps.
lAir conditioner switch is OFF.
lHeater fan switch is OFF.
lRear defogger switch is OFF.
lHeat up switch is OFF.
lSteering wheel is in the straight-ahead position, etc.
1.INSPECTION START
1. Check service records for any recent repairs that may indicate a related incident.
2. Check the current need for scheduled maintenance, especially for fuel filter and air cleaner filter. Refer to
MA-8, "
PERIODIC MAINTENANCE".
3. Open engine hood and check the following:
–Harness connectors for improper connections
–Vacuum hoses for splits, kinks, or improper connections
–Wiring for improper connections, pinches, or cuts
4. Start engine and warm it up to the normal operating tempera-
ture.
>> GO TO 2.
2.PREPARATION FOR CHECKING IDLE SPEED
With CONSULT-II
Connect CONSULT-II to the data link connector.
Without CONSULT-II
Install diesel tacho tester to the vehicle.
>> GO TO 3.
SEF142I

TROUBLE DIAGNOSIS
EC-57
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EC71 LTurbocharger boost sensor
ground[Ignition switch ON]Approximately 0.3V
72 BRRefrigerant pressure sensor
ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0.3V
73 B Mass air flow sensor ground[Ignition switch ON]Approximately 0.3V
74 RIntake air temperature sen-
sor ground[Ignition switch ON]Approximately 0.3V
82 WAccelerator pedal position
sensor 1 power supply[Ignition switch ON]Approximately 5.3V
83 RAccelerator pedal position
sensor 1[Ignition switch ON]
lEngine: Stopped
lAccelerator pedal: Fully released0.95 - 1.17V
[Ignition switch ON]
lEngine: Stopped
lAccelerator pedal: Fully depressedMore than 4.6V
84 BAccelerator pedal position
sensor 1 ground[Ignition switch ON]Approximately 0.3V
85 —Sensor ground
(Accelerator pedal position
sensor shield circuit)[Ignition switch ON]Approximately 0.3V
87 P CAN communication line[Ignition switch ON]Approximately 2.0 - 2.6V
Output voltage varies with the
communication status.
89 SB Data link connector[Ignition switch ON]
lCONSULT-II: DisconnectedApproximately 0V - Battery volt-
age (11 - 14V)
90 WAccelerator pedal position
sensor 2 power supply[Ignition switch ON]Approximately 5.3V
91 RAccelerator pedal position
sensor 2[Ignition switch ON]
lEngine: Stopped
lAccelerator pedal: Fully released0.58 - 0.78V
[Ignition switch ON]
lEngine: Stopped
lAccelerator pedal: Fully depressedMore than 2.3V
92 BAccelerator pedal position
sensor 2 ground[Ignition switch ON]Approximately 0.3V
95 L CAN communication line[Ignition switch ON]Approximately 2.6 - 3.2V
Output voltage varies with the
communication status.
99 V Start signal[Ignition switch ON]Approximately 0.3V
[Ignition switch START]BATTERY VOLTAGE
(11 - 14V)
100 V Stop lamp switch[Ignition switch OFF]
lBrake pedal: Fully releasedApproximately 0V
[Ignition switch OFF]
lBrake pedal: Slightly depressedBATTERY VOLTAGE
(11 - 14V) TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)

EC-58
TROUBLE DIAGNOSIS
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)101 W ASCD brake switch[Ignition switch ON]
lBrake pedal: Fully released (A/T)
lClutch pedal and brake pedal:
Fully released (M/T)BATTERY VOLTAGE
(11 - 14V)
[Ignition switch ON]
lBrake pedal: Slightly depressed (A/T)
lClutch pedal and/or brake pedal:
Slightly depressed (M/T)Approximately 0V
102 SB ASCD steering switch[Ignition switch ON]
lASCD steering switch: OFFApproximately 4.3V
[Ignition switch ON]
lON/OFF switch: PressedApproximately 0.3V
[Ignition switch ON]
lCANCEL switch: PressedApproximately 1.3V
[Ignition switch ON]
lRESUME/ACCELERATE switch: PressedApproximately 3.3V
[Ignition switch ON]
lSET/COAST switch: PressedApproximately 2.3V
103 BASCD steering switch
ground[Ignition switch ON]Approximately 0.3V
105 BR ECM relay (self shut-off)[Ignition switch ON]
[Ignition switch OFF]
lFor a few seconds after turning ignition
switch OFFApproximately 1.0V
[Ignition switch OFF]
lMore than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
107
108R
RIgnition switch[Ignition switch ON]BATTERY VOLTAGE
(11 - 14V)
11 0G(A/T)
O (M/T)Park/Neutral position switch[Ignition switch ON]
lShift lever: P or N (A/T), Neutral (M/T)Approximately 0V
[Ignition switch ON]
lExcept the above positionBATTERY VOLTAGE
(11 - 14V)
113 BR ECM relay (self shut-off)[Ignition switch ON]
[Ignition switch OFF]
lFor a few seconds after turning ignition
switch OFFApproximately 1.0V
[Ignition switch OFF]
lMore than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
114 B ECM ground[Engine is running]
lIdle speedApproximately 0V
11 9
120R
GPower supply for ECM[Ignition switch ON]BATTERY VOLTAGE
(11 - 14V)
121 VPower supply for ECM
(Back-up)[Ignition switch OFF]BATTERY VOLTAGE
(11 - 14V) TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)

TROUBLE DIAGNOSIS
EC-67
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P/N POSI SWlIgnition switch: ONShift lever:
P or N (A/T), Neutral (M/T)ON
Except above OFF
START SIGNAL
lIgnition switch: ON®START®ON OFF®ON®OFF
AIRCONDSIG
lEngine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
BRAKE SW
lIgnition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
BRAKE SW2
lIgnition switch: ON
lBrake pedal: Fully released (A/T)
lClutch pedal and brake pedal:
Fully released (M/T)OFF
lBrake pedal: Slightly depressed
(A/T)
lClutch pedal and/or brake pedal:
Slightly depressed (M/T)ON
IGN SW
lIgnition switch: ON®OFF ON®OFF
WARM UP SW
lIgnition switch: ONHeat up switch: OFF OFF
Heat up switch: ON ON
MAS AIR/FL SE*
lEngine: After warming up
lAir conditioner switch: OFF
lShift lever:
P or N (A/T), Neutral (M/T)
lNo loadIgnition switch: ON
(Engine stopped)Approximately 0.4V
Idle 1.3 - 1.7V
Engine is revving from idle to about
4,000 rpm.1.3 - 1.7V to Approximately 4.0V
(Check for liner voltage rise in
response to engine being
increased to about 4,000 rpm)
MAIN INJ WID
lEngine: After warming up
lShift lever:
P or N (A/T), Neutral (M/T)
lIdle speedNo load 0.50 - 0.70 msec
Blower fan switch: ON
Rear window defogger switch: ON0.50 - 0.80 msec
PUMP CURRENT
lEngine: After warming up
lAir conditioner switch: OFF
lShift lever:
P or N (A/T), Neutral (M/T)
lNo loadIdle 1,600 - 2,000 mA
2,000 rpm 1,500 - 1,900 mA
GLOW RLY Refer toEC-295, "
GLOW CONTROL SYSTEM".
COOLING FAN
lEngine: After warming up, idle
the engine
lAir conditioner switch: OFFEngine coolant temperature:
97°C (207°F) or lessOFF
Engine coolant temperature:
Between 98°C(208°F) and 104°C
(219°F)LOW
Engine coolant temperature:
105°C(221°F) or moreHI
EGR VOL CON/V
lEngine: After warming up
lAir conditioner switch: OFF
lShift lever:
P or N (A/T), Neutral (M/T)
lNo loadAfter 1 minute at idle More than 10 steps
Revving engine from idle to 3,200
rpm0step
INT/A VOLUME
lEngine: After warming up, idle the engine 150 - 450 mg/ MONITOR ITEM CONDITION SPECIFICATION

DTC U1000 CAN COMMUNICATION LINE
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DTC U1000 CAN COMMUNICATION LINEPFP:23710
DescriptionEBS01KDA
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 2
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.
On Board Diagnosis LogicEBS01KDB
The MI will not light up for this self-diagnosis.
DTC Confirmation ProcedureEBS01KDC
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch ON and wait at least 3 seconds.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. If DTC is detected, go toEC-81, "
Diagnostic Procedure".
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
U1000
1000CAN communication
line
lECM can not communicate to other control
unit.
lECM can not communicate for more than the
specified time.
lHarness or connectors
(CAN communication line is open or
shorted)
SEF817Y