2005 NISSAN NAVARA cooling

EC-18
ENGINE CONTROL SYSTEM
System Chart
EBS01KCD
*1: The input signal is sent to the ECM through CAN communication line.
*2: The output signal is sent from the ECM through CAN communication line.
Fuel Injection Control SystemEBS01KCE
SYSTEM DESCRIPTION
Three types of fuel injection control are provided to accommodate engine operating conditions; normal control,
idle control and start control. The ECM determines the appropriate fuel injection control. Under each control,
the amount of fuel injected is adjusted to improve engine performance.
Pulse signals are sent to fuel injectors according to the input signals to adjust the amount of fuel injected to
preset value.
START CONTROL
Input/Output Signal Chart
Input (Sensor) ECM Function Output (Actuator)
lAccelerator pedal position sensor
lFuel rail pressure sensor
lFuel pump temperature sensor
lEngine coolant temperature sensor
lMass air flow sensor
lIntake air temperature sensor
lCrankshaft position sensor
lCamshaft position sensor
lTurbocharger boost sensor
lWheel sensor*1
lIgnition switch
lASCD steering switch
lASCD brake switch
lASCD clutch switch
lSt o p l a m p s w it c h
lAir conditioner switch*1
lFront air control*1
lPark/neutral position switch
lHeat up switch
lRefrigerant pressure sensor
lBattery voltageFuel injection control Fuel injector and Fuel pump
Fuel injection timing control Fuel injector and Fuel pump
Fuel cut control Fuel injector and Fuel pump
Glow control system
Glow relay and glow indicator lamp*
2
ASCD vehicle speed control Fuel injector and Fuel pump
On board diagnostic system
Malfunction indicator (MI)*
2
EGR volume control EGR volume control valve
Cooling fan control
Cooling fan relay*
2
Turbocharger boost controlTurbocharger boost control solenoid
valve
Intake air control valve controlIntake air control valve control solenoid
valve
Air conditioning cut control
Air conditioner relay*
2
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (start
control)Fuel injector
Fuel pump Crankshaft position sensor Engine speed
Camshaft position sensor Piston position
Ignition switch Start signal
Fuel rail pressure sensor Fuel rail pressure

TROUBLE DIAGNOSIS
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EC
1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Crankshaftpositionsensorcircuit 1111111111EC-159
Camshaft position sensor circuit 3 3EC-171
Turbocharger boost sensor circuit 1 1 1EC-153
Turbocharger boost control solenoid
valve circuit111EC-309
Intake air control valve control solenoid
valve circuit11111111EC-314
Start signal circuit 1 1 1 1 1 1 1 1 1EC-348
Ignition switch circuit 1 1 1 1EC-71
Heat up switch circuit1EC-319
Power supply for ECM circuit 1 1 1 1EC-71
Cooling fan relay circuitEC-132
EGR volume control valve circuit 1 1 1EC-302
Glow relay circuit 1 1 1EC-295
ECM relay (Self shut-off) circuit 1 1 1 1EC-232
ECM 2222222222222EC-213
,
EC-215
,
EC-269
NATS (Nissan Anti-theft System) 1EC-28
SYSTEM — Basic engine control systemSYMPTOM
Reference
pageHARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
KNOCK/DETONATION
LACK OF POWER
POOR ACCELERATION
HI IDLE
LOW IDLE NO START (with first firing)
NO START (without first firing)
HARD TO START WHEN ENGINE IS COLD
HARD TO START WHEN ENGINE IS HOT
AT I D L E
DURING DRIVING
WHEN DECELERATING
Warranty symptom code AA AB AC AD AE AF

TROUBLE DIAGNOSIS
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1 - 5: The numbers refer to the order of inspection.
ENGINE CONTROL
Crankshaft position sensor circuit 1 1 1 1EC-159
Camshaft position sensor circuit11EC-171
Turbocharger boost sensor circuit 1 1EC-153
Turbocharger boost control solenoid valve cir-
cuit11EC-309
Start signal circuitEC-348
Ignition switch circuitEC-71
Heat up switch circuitEC-319
Power supply for ECM circuit11EC-71
Cooling fan relay circuit 2EC-132
EGR volume control valve circuit 1EC-302
Glow relay circuit1EC-295
ECM relay (Self shut-off) circuit1EC-232
ECM 22 22222 2222EC-213
,
EC-215
,
EC-269
NATS (Nissan Anti-theft System)1EC-28
SYSTEM — Basic engine control systemSYMPTOM
Reference
page
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
ABNORMAL SMOKE COLOR
DEAD BATTERY (UNDER CHARGE)
Malfunction indicator illuminates.
Can be detected by CONSULT-II?BLACK SMOKE
WHITE SMOKE
Warranty symptom code AG AH AJ AK AL AM AP HA

EC-46
TROUBLE DIAGNOSIS
Engine Control Component Parts Location
EBS01KCX
1. IPDM E/R 2. ECM 3. Glow relay
4. Turbocharger boost sensor 5. Refrigerant pressure sensor 6. Engine coolant temperature sensor
7. Fuel pump 8. Cooling fan motor 9. Intake air control valve actuator
10. Turbocharger boost control solenoid
valve11. Mass air flow sensor 12. Turbocharger boost control actuator
13. Camshaft position sensor 14. Glow plug 15. Fuel injector
16. Fuel rail pressure sensor 17. Intake air control valve control
solenoid valve18. EGR volume control valve
MBIB1198E

EC-60
TROUBLE DIAGNOSIS
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
X: ApplicableItemDIAGNOSTIC TEST MODE
SELF-DIAG RESULTS
DATA MON-
ITORACTIVE
TEST
DTCFREEZE
FRAME
DATA
ENGINE CONTROL COMPONENT PARTS
INPUTCrankshaft position sensor´´´
Camshaft position sensor´
Engine coolant temperature sensor´´´´
Vehicle speed signal´´´
Fuel pump temperature sensor´´
Accelerator pedal position sensor 1´´
Accelerator pedal position sensor 2´´
Fuel rail pressure sensor´´
Mass air flow sensor´´
Intake air temperature sensor´
Turbocharger boost sensor´´´
Refrigerant pressure sensor´
Battery voltage´´
Park/neutral position (PNP) switch´
Heat up switch´
Stop lamp switch´´
Barometric pressure sensor (built-into ECM)´´
ASCD steering switch´´
ASCD brake switch´´
ASCD clutch switch´´
OUTPUTFuel pump´´´
Fuel injector´´´
Glow relay´´
Cooling fan relay´´´
Turbocharger boost control solenoid valve´
Intake air control valve control solenoid valve
EGR volume control valve´´

TROUBLE DIAGNOSIS
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ECACT CR PRESS [MPa]´´
lThe Fuel rail pressure (determined by
the signal voltage of the fuel rail pres-
sure sensor) is displayed.
BATTERY VOLT [V]´´
lThe power supply voltage of ECM is
displayed.
P/N POSI SW [ON/OFF]´´
lIndicates [ON/OFF] condition from the
park/neutral position switch signal.
START SIGNAL [ON/OFF]´´
lIndicates [ON/OFF] condition from the
starter signal.
AIR COND SIG [ON/OFF]´´
lIndicates [ON/OFF] condition of the air
conditioner switch as determined by
the air conditioner signal.
BRAKE SW [ON/OFF]´´
lIndicates [ON/OFF] condition from the
stop lamp switch signal.
BRAKE SW2 [ON/OFF]´´
lIndicates [ON/OFF] condition from the
ASCD brake switch and ASCD clutch
switch signal.
IGN SW [ON/OFF]´´
lIndicates [ON/OFF] condition from
ignition switch signal.
WARM UP SW [ON/OFF]´
lIndicates [ON/OFF] condition from
heat up switch signal.
MAS AIR/FL SE [V]´´
lThe signal voltage of the mass air flow
sensor is displayed.This signal is converted by ECM inter-
nally. Thus, these differ from ECM termi-
nals voltage.
MAIN INJ WID [msec]´
lIndicates the actual fuel injection pulse
width compensated by ECM according
to the input signals.
PUMP CURRENT [mA]´
lIndicates the fuel pump power supply
current from the ECM.
GLOW RLY [ON/OFF]´
lThe glow relay control condition
(determined by ECM according to the
input signal) is displayed.
COOLING FAN
[LOW/HI/OFF]´
lIndicates the control condition of the
cooling fans (determined by ECM
according to the input signal).
LOW ... Operates at low speed
HI ... Operates at high speed
OFF ... Stopped
EGR VOL CON/V [step]´
lIndicates the EGR volume control
value computed by the ECM accord-
ing to the input signals.
lThe opening becomes larger as the
value increases.
INT/A VOLUME [mg/]
lThe intake air volume computed from
the mass air flow sensor signal is dis-
played.
BARO SEN [kPa]´´
lThe barometric pressure (determined
by the signal voltage from the absolute
pressure sensor built into the ECM) is
displayed. MONITOR ITEMECM
INPUT
SIG-
NALMAIN
SIG-
NALSCONDITION SPECIFICATION

EC-64
TROUBLE DIAGNOSIS
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
INT/M PRES SE [kPa]
lTurbocharger boost (determined by
the signal voltage from the turbo-
charger boost sensor) is displayed.
CYL COUNT [1/2/3/4]
lThe cylinder being injected is dis-
played.
1 ... Cylinder No.1 is injected.
2 ... Cylinder No.2 is injected.
3 ... Cylinder No.3 is injected.
4 ... Cylinder No.4 is injected.
SET SW
[ON/OFF]´
lIndicates [ON/OFF] condition from
SET/COAST switch signal.
RESUME/ACC SW
[ON/OFF]´
lIndicates [ON/OFF] condition from
RESUME/ACCEL switch signal.
CANCEL SW
[ON/OFF]´
lIndicates [ON/OFF] condition from
CANCEL switch signal.
MAIN SW
[ON/OFF]´
lIndicates [ON/OFF] condition from
MAIN switch signal.
ASCD APPLY [YES/NO]
lDisplaying ASCD application status
stored in ECM.
VDC APPLY [YES/NO]
lDisplaying ESP application status
stored in ECM.
AC PRESS SEN [V]
lThe signal voltage from the refrigerant
pressure sensor is displayed.
Voltage [V]
Voltage, frequency, duty cycle or pulse
width measured by the probe.Only “#” is displayed if item is unable to
be measured.
Figures with “#”s are temporary ones.
They are the same figures as an actual
piece of data which was just previously
measured. [Hz] or [%] Frequency
[msec],[Hz]or[%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOWMONITOR ITEMECM
INPUT
SIG-
NALMAIN
SIG-
NALSCONDITION SPECIFICATION
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
POWER BAL-
ANCE
lEngine: After warming up, idle the
engine.
lA/C switch: OFF
lShift lever: P or N (A/T), Neutral
(M/T)
lCut off each injector signal one at
a time using CONSULT-IIEngine runs rough or dies.
lHarness and connectors
lCompression
lFuel injector
COOLING FAN *
lIgnition switch: ON
lOperate the cooling fan at LOW,
HI speed and turn OFF using
CONSULT-II.Cooling fan moves at LOW, HI
speed and stops.lHarness and connector
lCooling fan motor
lCooling fan relay
ENG COOLANT
TEMP
lEngine: Return to the original
trouble condition
lChange the engine coolant tem-
perature using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
lHarness and connectors
lEngine coolant temperature sen-
sor
lFuel injector

TROUBLE DIAGNOSIS
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*: Leaving cooling fan OFF with CONSULT-II while engine is running may cause the engine to overheat.
REAL TIME DIAGNOSIS IN DATA MONITOR MODE
CONSULT-II has two kinds of triggers and they can be selected by touching “SETTING” in “DATA MONITOR”
mode.
1. “AUTO TRIG” (Automatic trigger):
–The malfunction will be identified on the CONSULT-II screen in
real time.
In other words, DTC will be displayed if the malfunction is
detected by ECM.
At the moment a malfunction is detected by ECM, “MONITOR”
in “DATA MONITOR” screen is changed to “Recording Data ...
xx%” as shown in the figure, and the data after the malfunction
detection is recorded. Then when the percentage reached
100%, “REAL-TIME DIAG” screen is displayed. If “STOP” is
touched on the screen during “ Recording Data ... xx%”, “REAL-
TIME DIAG” screen is also displayed.
The recording time after the malfunction detection and the recording speed can be changed by “TRIG-
GER POINT” and “Recording Speed”. Refer to CONSULT-II OPERATION MANUAL.
2. “MANU TRIG” (Manual trigger):
–DTC will not be displayed automatically on CONSULT-II screen
even though a malfunction is detected by ECM.
DATA MONITOR can be performed continuously even though a
malfunction is detected.
Use these triggers as follows:
1. “AUTO TRIG”
–While trying to detect the DTC by performing the DTC Confirma-
tion Procedure, be sure to select to “DATA MONITOR (AUTO
TRIG)” mode. You can confirm the malfunction at the moment it
is detected.
–While narrowing down the possible causes, CONSULT-II should be set in “DATA MONITOR (AUTO
TRIG)” mode, especially in case the incident is intermittent.
When you are inspecting the circuit by gently shaking (or twisting) the suspicious connectors, components
and harness in the DTC Confirmation Procedure, the moment a malfunction is found the DTC will be dis-
played. Refer toGI-24, "
How to Perform Efficient Diagnosis for an Electrical Incident", “INCIDENT SIMU-
LATION TESTS”.
2. “MANU TRIG”
GLOW RLY
lIgnition switch: ON (Engine
stopped)
lTurn the glow relay ON and OFF
using CONSULT-II and listen to
operating sound.Glow relay makes the operating
sound.lHarness and connector
lGlow relay
EGR VOL CONT/
V
lIgnition switch: ON
lChange EGR volume control
valve opening step using CON-
SULT-II.EGR volume control valve makes
an operating sound.lHarness and connector
lEGR volume control valve
PRES REGULA-
TOR
lIgnition switch: ON
lChange fuel rail pressure using
CONSULT-IIFuel leaks.lFuel line
lFuel pressure relief valve
PUMP LEANT
CLEAR
lThis mode is used for performing Fuel Pump Learning Value Clearing. Refer toEC-24, "Fuel Pump Learning
Value Clearing". TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
PBIB0480E
SEF707X