NISSAN ALMERA TINO 2001 Service Repair Manual

Wiring DiagramNLEC1401MODELS WITH ECM IN ENGINE COMPARTMENTNLEC1401S01
YEC689
DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT)
SR20DE
Wiring Diagram
EC-696

MODELS WITH ECM IN CABINNLEC1401S02
YEC914
DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT)
SR20DE
Wiring Diagram (Cont'd)
EC-697

Diagnostic ProcedureNLEC1402
1 CHECK POWER SUPPLY
1. Turn ignition switch ªOFFº.
2. Disconnect engine coolant temperature sensor harness connector.
SEF773Z
3. Turn ignition switch ªONº.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester.
SEF301X
OK or NG
OK©GO TO 3.
NG©GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the harness for open or short between ECM and engine coolant temperature sensor.
©Repair harness or connectors.
3 CHECK GROUND CIRCUIT
1. Turn ignition switch ªOFFº.
2. Check harness continuity between engine coolant temperature sensor terminal 2 and engine ground.
Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK©GO TO 5.
NG©GO TO 4.
DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT)
SR20DE
Diagnostic Procedure
EC-698

4 DETECT MALFUNCTIONING PART
Check the following.
+Joint connector-1 (where fitted)
+Joint connector F46 (where fitted)
+Harness for open or short between ECM and engine coolant temperature sensor
+Harness for open or short between engine coolant temperature sensor and TCM (Transmission Control Module)
©Repair open circuit or short to power in harness or connectors.
5 CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to ªComponent Inspectionº, EC-699.
OK or NG
OK©GO TO 6.
NG©Replace engine coolant temperature sensor.
6 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-670.
©INSPECTION END
SEF152P
SEF012P
Component InspectionNLEC1403ENGINE COOLANT TEMPERATURE SENSORNLEC1403S01Check resistance as shown in the figure.

Temperature ÉC (ÉF) Resistance kW
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
If NG, replace engine coolant temperature sensor.
DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT)
SR20DE
Diagnostic Procedure (Cont'd)
EC-699

Component DescriptionNLEC1404NOTE:
If DTC P0120 (0120) is displayed with DTC P0510 (0510), first perform trouble diagnosis for DTC P0510,
EC-872.
The throttle position sensor responds to the accelerator pedal movement. This sensor is a kind of potentiom-
eter which transforms the throttle position into output voltage, and emits the voltage signal to the ECM. In
addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal
to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sen-
sor. This sensor controls engine operation such as fuel cut. On the other hand, the ªWide open and closed
throttle position switchº, which is built into the throttle position sensor unit, is not used for engine control.
SEF208W
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1405Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
THRTL POS SEN+Engine: Idle Throttle valve: fully closed 0.15 - 0.85V
+Ignition switch: ON
(Engine stopped)Throttle valve: fully opened 3.5 - 4.7V
ABSOL TH´P/S+Engine: Idle Throttle valve: fully closed 0.0É
+Ignition switch: ON
(Engine stopped)Throttle valve: fully opened Approx. 80É
DTC P0120 THROTTLE POSITION SENSORSR20DE
Component Description
EC-700

ECM Terminals and Reference Value=NLEC1406Specification data are reference values and are measured between each terminal 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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
58 B Sensors' ground[Engine is running]
+Warm up condition
+Idle speedApproximately 0V
92 Y Throttle position sensor[Engine is running]
+Accelerator pedal fully released0.15 - 0.85V
[Ignition switch ªONº]
+Accelerator pedal fully depressed3.5 - 4.7V
111 R Sensors' power supply[Ignition switch ªONº]Approximately 5V
On Board Diagnosis LogicNLEC1407
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0120
0120An excessively low or high voltage from the sensor is
sent to ECM* while driving.+Harness or connectors
(The throttle position sensor circuit is open or
shorted.)
+Throttle position sensor
*: When this malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Fail-safe ModeNLEC1408
Detected items Engine operating condition in fail-safe mode
Throttle position sensor
circuitThrottle position will be determined based on the injected fuel amount and the engine speed.
Therefore, acceleration will be poor.
Condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration
DTC Confirmation ProcedureNLEC1409NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 10 seconds
before conducting the next test.
CAUTION:
Always drive vehicle at a safe speed.
TESTING CONDITION:
+Before performing the following procedure, confirm that
battery voltage is more than 10V at idle.
+This test may be conducted with the drive wheels lifted in
DTC P0120 THROTTLE POSITION SENSORSR20DE
ECM Terminals and Reference Value
EC-701

the shop or by driving the vehicle. If a road test is
expected to be easier, it is unnecessary to lift the vehicle.
SEF175Y
With CONSULT-II
1) Turn ignition switch ªONº and select ªDATA MONITORº mode
with CONSULT-II.
2) Start engine and maintain the following conditions for at least
5 consecutive seconds.
VHCL SPEED SE More than 4 km/h (2 MPH)
Selector lever Suitable position except ªPº or ªNº
position
3) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-705.
With GST
Follow the procedure ªWith CONSULT-IIº above.
No Tools
1) Start engine and maintain the following conditions for at least
5 consecutive seconds.
Vehicle speed More than 4 km/h (2 MPH)
Selector lever Suitable position except ªPº or ªNº position
2) Turn ignition switch ªOFFº and wait at least 10 seconds.
3) Turn ignition switch ªONº and perform ªDiagnostic Test Mode
II (Self-diagnostic results)º with ECM.
4) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-705.
DTC P0120 THROTTLE POSITION SENSORSR20DE
DTC Confirmation Procedure (Cont'd)
EC-702

Wiring DiagramNLEC1410MODELS WITH ECM IN ENGINE COMPARTMENTNLEC1410S01
YEC690
DTC P0120 THROTTLE POSITION SENSORSR20DE
Wiring Diagram
EC-703

MODELS WITH ECM IN CABINNLEC1410S02
YEC915
DTC P0120 THROTTLE POSITION SENSORSR20DE
Wiring Diagram (Cont'd)
EC-704

Diagnostic ProcedureNLEC1411
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screws.
SEF202X
©GO TO 2.
2 CHECK POWER SUPPLY
1. Disconnect throttle position sensor harness connector.
SEF770Z
2. Turn ignition switch ªONº.
3. Check voltage between throttle position sensor terminal 3 and ground with CONSULT-II or tester.
SEF306X
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
+Joint connector-3
+Harness for open or short between throttle position sensor terminal 3 and ECM terminal 111
©Repair harness or connectors.
DTC P0120 THROTTLE POSITION SENSORSR20DE
Diagnostic Procedure
EC-705