engine NISSAN TERRANO 2002 Service Repair Manual

Diagnostic Procedure
INSPECTION START
CHECK POWER SUPPLY.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect mass air flow sensor har-
ness connector.
3. Turn ignition switch to ªONº position.
4. Check voltage between mass air flow
sensor connector terminalq
2and
engine ground with CONSULT-II or
tester.
Voltage: Battery positive voltage
OK
ENG
Check the following:
I20A fuse
IECM Relay
IHarness continuity
between ECM relay (coil
and load side) connector
and battery supply
IHarness connectors
F100,M755(RHD mod-
els)
IHarness connectors
M787,F66(LHD mod-
els)
IHarness continuity
between ECM relay con-
nector and Mass Air
Flow Sensor Connector.
If NG, replace 20A fuse or
ECM relay, or repair har-
ness or connectors.
CHECK GROUND CIRCUIT.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect ECM harness connector.
3. Loosen and retighten engine ground
screws.
4. Check harness continuity between
mass air flow sensor harness connec-
tor terminalq
3and ECM connector ter-
minal218. Refer to wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
ENG
Check the following.
IHarness connectors
F100,M755(RHD mod-
els)
IHarness continuity
between mass air flow
sensor and ECM
If NG, repair or replace
harness or connectors.
CHECK INPUT SIGNAL CIRCUIT.
Check harness continuity between mass
air flow sensor connector terminalq
4and
ECM connector terminal223. Refer to
wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
ENG
Check the following.
IHarness connectors
F100,M755(RHD mod-
els)
IHarness continuity
between mass air flow
sensor and ECM
If NG, repair or replace
harness or connectors.
CHECK INPUT SIGNAL CIRCUIT.
Check harness continuity between mass
air flow sensor connector terminalq
5and
ECM connector terminal224. Refer to
wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
ENG
Check the following.
IHarness connectors
F100,M755(RHD mod-
els)
IHarness continuity
between mass air flow
sensor and ECM
If NG, repair or replace
harness or connectors.
CHECK COMPONENT
(Mass air flow sensor).
Refer to ªCOMPONENT INSPECTIONº,
EC-360.
OK
ENG
Replace mass air flow sen-
sor.
qA
NEF664
NEF591
NEF352
H
H
H
H
H
H
DTC P0100 MASS AIR FLOW SENTD27Ti
EC-359

qA
Disconnect and reconnect harness
connectors, then retest.
Trouble is not fixed.
Check ECM pin terminals for damage or
the connection of ECM harness connector.
Reconnect ECM harness connector and
retest.
INSPECTION END
Component Inspection
MASS AIR FLOW SENSOR
1. Turn ignition switch to ªONº position.
2. Start engine and warm it up sufficiently.
3. Check voltage between mass air flow sensor connector termi-
nalq
5and engine ground.
Condition Voltage V
Ignition switch ªONº position (Engine stopped.) Approx. 1.0
Idle (Engine is warmed-up sufficiently.) Approx. 2.2
4. If NG, remove mass air flow sensor from air duct. Check hot film
for damage or dust.
MEC957D
NEF669
H
H
H
DTC P0100 MASS AIR FLOW SENTD27Ti
Diagnostic Procedure (Cont'd)
EC-360

Component Description
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
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 cool-
ant temperature input. The sensor comprises a thermistor which is
sensitive to the change in temperature. The electrical resistance of
the thermistor decreases as temperature increases.

Engine coolant
temperature
ÉC (ÉF)Voltage
(V)Resistance
(kW)
þ10 (14) 4.4 7.0 - 11.4
20 (68) 3.5 2.1 - 2.9
50 (122) 2.3 0.68 - 1.00
90 (194) 1.0 0.236 - 0.260
On Board Diagnosis Logic
DTC Malfunction is detected when ...Check Items
(Possible Cause)
P0115
0103IAn excessively high or low voltage from the sensor is
input to ECM.IHarness or connectors
(The sensor circuit is open or short-circuited.)
IEngine coolant temperature sensor
DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch to ªONº position.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Wait at least 5 seconds.
WITHOUT CONSULT-II
1) Turn ignition switch to ªONº position and wait at least 5 sec-
onds.
2) Turn ignition switch to ªLOCKº position, wait at least 5 seconds
and then turn to ªONº position.
3) Perform diagnostic test mode II (Self-diagnostic results).
SEF594K
SEF012P
DTC P0115 COOLANT TEMP SENTD27Ti
EC-361

Diagnostic Procedure
INSPECTION START
CHECK POWER SUPPLY.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect engine coolant temperature
sensor harness connector.
3. Turn ignition switch to ªONº position.
4. Check voltage between engine coolant
temperature sensor connector terminal
q
1and engine ground with CONSULT-II
or tester.
Voltage:
Approximately 4.9V
OK
ENG
Check the following:
IHarness connectors
E151,F138(LHD model)
E151,M843(RHD
model)
IHarness for open or
short circuit between
ECM and engine coolant
temperature sensor.
If NG, repair harness or
connectors.
CHECK GROUND CIRCUIT.
1. Turn ignition switch to ªLOCKº position.
2. Check harness continuity between
engine coolant temperature sensor
connector terminalq
2and ECM terminal
334. Refer to wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
ENG
Check the following:
IHarness connectors
E151,F138(LHD model)
E151,M843(RHD
model)
IHarness for open or
short circuit between
ECM and engine coolant
temperature sensor.
If NG, repair harness or
connectors.
CHECK COMPONENT
(Engine coolant temperature sensor).
Refer to EC-364.
OK
ENG
Replace engine coolant
temperature sensor.
Disconnect and reconnect harness con-
nectors in the circuit. Then retest.
Trouble is not fixed.
Check ECM pin terminals for damage and
check the connection of ECM harness
connector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
NEF487
NEF670
H
H
H
H
H
H
DTC P0115 COOLANT TEMP SENTD27Ti
EC-363

Component Inspection
ENGINE COOLANT TEMPERATURE SENSOR
Check resistance as shown in the figure.
Temperature ÉC (ÉF) Resistance kW
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.0
90 (194) 0.236 - 0.260
If NG, replace engine coolant temperature sensor.SEF152P
SEF012P
DTC P0115 COOLANT TEMP SENTD27Ti
EC-364

DTC Confirmation Procedure B (For
Accelerator Sticking)
If DTC P0571 is displayed same time, cure it at first.
WITH CONSULT-II
1) Turn ignition switch to ªONº position.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Start engine and rev it up to above 1,300 rpm.
4) Depress brake pedal immediately after releasing accelerator
pedal and keep it at least 5 seconds.
WITHOUT CONSULT-II
1) Start engine and rev it up to above 1,300 rpm.
2) Depress brake pedal immediately after releasing accelerator
pedal and keep it at least 5 seconds.
3) Turn ignition switch to ªLOCKº position, wait at least 5 seconds
and then turn to ªONº position.
4) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º with
ECM.
DTC P0120 ACCEL POS SENSORTD27Ti
EC-366

Diagnostic Procedure
ACCELERATOR POSITION SENSOR
INSPECTION START
CHECK POWER SUPPLY.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect accelerator work unit har-
ness connector.
3. Turn ignition switch to ªONº position.
4. Check voltage between accelerator
work unit connector terminalq
5and
engine ground with CONSULT-II or
tester.
Voltage: Approximately 5V
OK
ENG
Check the following:
IHarness for open or
short-circuit between
ECM and accelerator
work unit.
If NG, repair harness or
connectors.
CHECK INPUT SIGNAL CIRCUIT.
1. Turn ignition switch to ªLOCKº position.
2. Loosen and retighten engine ground
screws.
3. Check harness continuity between
accelerator work unit connector termi-
nalq
2and ECM connector terminal
434. Refer to wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
ENG
Check the following:
IHarness for open-circuit
between ECM and
accelerator work unit
If NG, repair harness or
connectors.
CHECK GROUND CIRCUIT.
1. Disconnect ECM harness connector.
2. Check harness continuity between
ECM terminal
425and accelerator
position sensor connector terminalq
4.
Refer to wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
ENG
Repair harness or connec-
tors.
CHECK COMPONENT
(Accelerator position sensor).
Refer to ªCOMPONENT INSPECTIONº on
page EC-371.
OK
ENG
Replace accelerator pedal
assembly.
Disconnect and reconnect harness con-
nectors in the circuit. Then retest.
Trouble is not fixed.
Check ECM pin terminals for damage and
check the connection of ECM harness
connector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
NEF700
NEF591
YEC246A
H
H
H
H
H
H
H
DTC P0120 ACCEL POS SENSORTD27Ti
EC-368

ACCELERATOR POSITION SWITCH
The accelerator position switch detects OFF-accelerator switch sig-
nal and Full-accelerator switch signal and sends these signals to
the ECM. The ECM will then determine engine idle conditions.
These signals are also used for diagnosing the accelerator position
sensor.
INSPECTION START
CHECK OVERALL FUNCTION.
With CONSULT-II
1. Turn ignition switch to ªONº position.
2. Select ªFULL ACCELL SWº and ªOFF
ACCEL SWº in ªDATA MONITORº mode
with CONSULT-II.
3. Check ªFULL ACCEL SWº and ªOFF
ACCEL SWº signal under the following
conditions.
OFF ACCEL SW:
Accelerator pedal released
ÐON
Accelerator pedal depressed
Ð OFF
FULL ACCEL SW:
Accelerator pedal fully depressed
ÐON
Without CONSULT-II
1. Turn ignition switch to ªONº position.
2. Check voltage between ECM terminal
435
and body ground under the following condi-
tions:
Voltage:
Accelerator pedal released
Approximately 0V
Accelerator pedal fully depressed
Approximately 5V
NG
EOK
INSPECTION END
qA
MEC969D
MEC955D
H
H
DTC P0120 ACCEL POS SENSORTD27Ti
Diagnostic Procedure (Cont'd)
EC-369

Diagnostic Procedure
INSPECTION START
CHECK POWER SUPPLY.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect electrical fuel injection
pump harness connector.
3. Turn ignition switch to ªONº position.
4. Check voltage between electronic con-
trol fuel injection pump (Fuel tempera-
ture sensor) harness connector termi-
nalq
6and engine ground with CON-
SULT-II or tester.
Voltage:
Approximately 4.9V
OK
ENG
Check the following:
IHarness for open or
short-circuit between
ECM and electronic con-
trol fuel injection pump
(fuel temperature sen-
sor)
If NG, repair harness or
connectors.
CHECK GROUND CIRCUIT.
1. Turn ignition switch to ªLOCKº position.
2. Check harness continuity between
electronic control fuel injection pump
(fuel temperature sensor) connector
terminalq
5and ECM connector
terminal
335. Refer to wiring dia-
gram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
ENG
Check the following:
IHarness for open or
short-circuit between
ECM and electronic con-
trol fuel injection pump
(fuel temperature sen-
sor).
If NG, repair harness or
connectors.
CHECK COMPONENT
[Electronic control fuel injection pump
(Fuel temperature sensor)].
Refer to ªCOMPONENT INSPECTIONº on
page EC-375.
OK
ENG
Have the injection pump
assembly serviced by an
authorised service repre-
sentative.
Disconnect and reconnect harness con-
nectors in the circuits. Then retest.
Trouble is not fixed.
Check ECM pin terminals for damage and
check the connection of ECM harness
connector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
YEC248A
YEC254A
H
H
H
H
H
H
DTC P0180 FUEL TEMP SENSORTD27Ti
EC-374

Component Description
FUEL CUT SOLENOID VALVE
When the ignition switch is off, the ECM turns the fuel cut solenoid
valve OFF (under this condition, no current flows through the fuel
cut solenoid valve), shutting off fuel supply.
When the engine is not operating due to trouble, the fuel cut sole-
noid valve may or may not be OFF even when the ignition switch
is ON.
On Board Diagnosis Logic
DTC Malfunction is detected when ...Check Items
(Possible Cause)
P0125
0306IFuel cut solenoid valve circuit is malfunctioning.IHarness or connectors
(The solenoid valve circuit is open or shorted.)
IFuel cut solenoid valve
DTC Confirmation Procedure
NOTE:
If DTC P0115 or P0335 is displayed same time, perform trouble
diagnosis for P0115 or P0335 first.
WITH CONSULT-II
1) Turn ignition switch to ªONº position.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Start engine. (If no start, circuit is open.)
4) Warm it up sufficiently.
5) Turn ignition switch to ªLOCKº position, wait at least 5 seconds.
6) Start engine and rev it up to above 1,300 rpm. Release pedal
and wait at least 3 seconds.
WITHOUT CONSULT-II
1) Start engine. (If no start, circuit is open.)
2) Warm it up sufficiently.
3) Turn ignition switch to ªLOCKº position, wait at least 5 seconds.
4) Start engine and rev it up to above 1,300 rpm. Release pedal
and wait at least 3 seconds.
5) Turn ignition switch to ªLOCKº position, wait at least 5 seconds
and then turn to ªONº position.
6) Perform ªDiagnostic Test Mode IIº (Self-diagnostic results).
SEF667S
DTC P0215 FUEL CUT S/V 1TD27Ti
EC-376