engine coolant NISSAN NAVARA 2005 Repair Service Manual

EC-52
TROUBLE DIAGNOSIS
ECM Harness Connector Terminal Layout
EBS01KCZ
ECM Terminals And Reference ValueEBS01KD0
PREPARATION
1. ECM located in the engine room passenger side behind coolant
reservoir tank.
2. Remove ECM harness connector.
3. When disconnecting ECM harness connector, loosen it with
levers as far as they will go as shown in the figure.
4. Connect a break-out box (SST) and Y-cable adapter (SST)
between the ECM and ECM harness connector.
lUse extreme care not to touch 2 pins at one time.
lData is for comparison and may not be exact.
ECM INSPECTION TABLE
Remarks: Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
MBIB0045E
BBIA0537E
PBIB1512E
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
1
2
3B
B
BECM ground[Engine is running]
lIdle speedApproximately 0V

EC-56
TROUBLE DIAGNOSIS
48
49L
BFuel rail pressure sensor[Engine is running]
lWarm-up condition
lIdle speed1.7 - 2.0V
[Engine is running]
lWarm-up condition
lEngine speed: 2,000 rpm2.0 - 2.3V
50 YFuel pump temperature sen-
sor[Engine is running]
lWarm-up conditionApproximately 0.3 - 5.3V
Output voltage varies with fuel
pump temperature
51 SBEngine coolant temperature
sensor[Engine is running]
lWarm-up conditionApproximately 0.3 - 5.3V
Output voltage varies with engine
coolant temperature
52 BR Turbocharger boost sensor[Engine is running]
lWarm-up condition
lIdle speed2.1 - 2.4V
[Engine is running]
lWarm-up condition
lEngine speed: 2,000 rpm2.3 - 2.6V
53 W Refrigerant pressure sensor[Engine is running]
lWarm-up condition
lBoth A/C switch and blower switch: ON
(Compressor operates)1.0 - 4.0V
54 G Mass air flow sensor[Ignition switch: ON]Approximately 0.7V
[Engine is running]
lWarm-up condition
lIdle speed1.6 - 2.0V
[Engine is running]
lWarm-up condition
lEngine is revving from idle to about 4,000
rpm.1.6 - 2.0V to Approximately 4.3V
(Check for liner voltage rise in
response to engine being
increased to about 4,000 rpm)
55 WIntake air temperature sen-
sor[Engine is running]
lWarm-up conditionApproximately 0.3 - 5.2V
Output voltage varies with intake
air temperature
63 RFuel rail pressure sensor
power supply[Ignition switch ON]Approximately 5.3V
64 VSensor power supply
(Turbocharger boost sensor /
Refrigerant pressure sensor)[Ignition switch ON]Approximately 5.3V
65 BCrankshaft position sensor
ground[Ignition switch ON]Approximately 0.3V
66 BCamshaft position sensor
ground[Ignition switch ON]Approximately 0.3V
67 —Sensor ground
(Sensor shield circuit)[Ignition switch ON]Approximately 0.3V
68 WFuel rail pressure sensor
ground[Ignition switch ON]Approximately 0.3V
69 BFuel pump temperature sen-
sor ground[Ignition switch ON]Approximately 0.3V
70 LGEngine coolant temperature
sensor ground[Ignition switch ON]Approximately 0.3V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)

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´´

EC-62
TROUBLE DIAGNOSIS
WORK SUPPORT MODE
Work Item
SELF-DIAGNOSTIC MODE
Self Diagnostic Item
Regarding items detected in “SELF-DIAG RESULTS” mode, refer to —EC-6, "INDEX FOR DTC".
Freeze Frame Data
DATA MONITOR MODE
WORK ITEM DESCRIPTION USAGE
ENTER INJCTR CALIB DATA
lInjector adjustment value is written onto ECM memory. When performing Injector Adjust-
ment Value Registration.
CONFIG CLR
lASCD application status stored in ECM is initialized.
NOTE:
After the status is initialized, ECM recognizes ASCD
application status when the following condition is met.
lFor ASCD: ASCD MAIN switch is pressed.When initializing ASCD applica-
tion status stored in ECM.
INJ ADJ VAL CLR
lInjector adjustment value stored in ECM is initialized. Before changing injector adjust-
ment value stored in ECM, it is
recommended to perform this
work item.
Freeze frame data item Description
DIAG TROUBLE CODE
[PXXXX]
lThe engine control component part/control system has a trouble code, it is displayed as “PXXXX”.
(Refer toEC-6, "
INDEX FOR DTC".)
CAL/LD VALUE [%]
lThe calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [°C] or [°F]
lThe engine coolant temperature at the moment a malfunction is detected is displayed.
ENGINE SPEED [rpm]
lThe engine speed at the moment a malfunction is detected is displayed.
VEHICL SPEED
[km/h] or [mph]
lThe vehicle speed at the moment a malfunction is detected is displayed.
INT MANI PRES [kPa]
lThe intake manifold pressure at the moment a malfunction is detected is displayed.
MONITOR ITEMECM
INPUT
SIG-
NALMAIN
SIG-
NALSCONDITION SPECIFICATION
CKPS·RPM (TDC) [rpm]´´
lThe engine speed computed from the
crankshaft position sensor signal is
displayed.
COOLAN TEMP/S
[°C] or [°F]´´
lThe engine coolant temperature
(determined by the signal voltage of
the engine coolant temperature sen-
sor) is displayed.When the engine coolant temperature
circuit is open or short, ECM enters fail-
safe mode. The engine coolant tempera-
ture determined by the ECM is dis-
played.
VHCL SPEED SE
[km/h] or [mph]´´
lThe vehicle speed computed form the
vehicle speed signal is displayed.
FUEL TEMP SEN
[°C] or [°F]´´
lThe fuel temperature (determined by
the signal voltage of the fuel pump
temperature sensor) is displayed.
ACCEL POS SEN [V]´´
lThe accelerator pedal position sensor
1 signal voltage is displayed.This signal is converted by ECM inter-
nally. Thus, these differ from ECM termi-
nals voltage.
ACCEL SEN 2 [V]´´
lThe accelerator pedal position sensor
2 signal voltage is displayed.This signal is converted by ECM inter-
nally. Thus, these differ from ECM termi-
nals voltage.

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
EC-67
C
D
E
F
G
H
I
J
K
L
MA
EC
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 P0117, P0118 ECT SENSOR
EC-103
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P0117, P0118 ECT SENSORPFP:22630
DescriptionEBS01KEB
The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.

*: This data is reference values and is measured between ECM terminal 51 (Engine
coolant temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis LogicEBS01KEC
The MI will not light up for these self-diagnoses.
DTC Confirmation ProcedureEBS01KED
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.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. If DTC is detected, go toEC-106, "
Diagnostic Procedure".
SEF594K
Engine coolant tempera-
ture°C(°F)Voltage* (V) Resistance (kW)
-10 (14) 4.7 7.0 - 11.4
20 (68) 3.8 2.1 - 2.9
50 (122) 2.6 0.68 - 1.00
90 (194) 1.3 0.236 - 0.260
SEF012P
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0117
0117Engine coolant temperature
sensor circuit low inputAn excessively low voltage from the sensor is
sent to ECM.
lHarness or connectors
(The sensor circuit is open or
shorted.)
lEngine coolant temperature sensor P0118
0118Engine coolant temperature
sensor circuit high inputAn excessively high voltage from the sensor is
sent to ECM.
SEF817Y

EC-106
DTC P0117, P0118 ECT SENSOR
Diagnostic Procedure
EBS01KEF
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
Refer toEC-78, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect engine coolant temperature sensor (1) harness con-
nector.
–: Vehicle front
–EGR volume control valve (2)
2. Turn ignition switch ON.
3. Check voltage between ECT sensor terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connectors.
: Vehicle front
1. Body ground E21 2. ECM 3. Body ground E41
4. A/C high-pressure service valve 5. ABS actuator and electric unit
(control unit)6. Body ground E61
MBIB1218E
MBIB1230E
Voltage: Approximately 5.3V
SEF193Z

DTC P0117, P0118 ECT SENSOR
EC-107
C
D
E
F
G
H
I
J
K
L
MA
EC
3.CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECT sensor terminal 2 and ECM terminal 70. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer toEC-107, "
Component Inspection".
OK or NG
OK >> GO TO 5.
NG >> Replace engine coolant temperature sensor.
5.CHECK INTERMITTENT INCIDENT
Refer toEC-70, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
Component InspectionEBS01KEG
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.

2. If NG, replace engine coolant temperature sensor.
Removal and InstallationEBS01KEH
ENGINE COOLANT TEMPERATURE SENSOR
Refer toEM-92, "CYLINDER HEAD". Continuity should exist.
PBIB2005E
Engine coolant temperature°C(°F) Resistance kW
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
SEF012P

EC-132
DTC P0217 ENGINE OVER TEMPERATURE
DTC P0217 ENGINE OVER TEMPERATURE
PFP:21481
DescriptionEBS01KFK
SYSTEM DESCRIPTION
NOTE:
If DTC P0217 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
EC-79, "
DTC U1000 CAN COMMUNICATION LINE".
Cooling Fan Control
*: This signal is sent to ECM through CAN communication line.
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].
Cooling Fan Operation
Cooling Fan Relay Operation
The ECM controls cooling fan relays in the IPDM E/R through CAN communication line.
COMPONENT DESCRIPTION
Cooling Fan Motor
The cooling fan operates at each speed when the current flows in the cooling fan motor as follows.
Sensor Input Signal to ECM ECM function Actuator
Wheel sensor Vehicle speed*
Cooling fan
controlIPDM E/R
(Cooling fan relays) Engine coolant temperature sensor Engine coolant temperature
Air conditioner switch Air conditioner ON signal*
Refrigerant pressure sensor Refrigerant pressure
MBIB1266E
Cooling fan speedCooling fan relay
12
Stop (OFF) OFF OFF
Low (LOW) ON OFF
High (HI) OFF ON
Cooling fan speedCooling fan motor terminals
(+) (-)
Low (LOW) 1 3
High (HI) 2 3