Nissan Terrano model r20 series 2004. Manual — part 166
Diagnostic Procedure
INSPECTION START
CHECK POWER SUPPLY.
1. Turn ignition switch to “LOCK” position.
2. Disconnect engine coolant temperature
sensor harness connector.
3. Turn ignition switch to “ON” position.
4. Check voltage between engine coolant
temperature sensor connector terminal
q
1
and engine ground with CONSULT-II
or tester.
Voltage:
Approximately 4.9V
OK
E
NG
Check the following:
I
Harness connectors
E151
,
F138
(LHD model)
E151
,
M843
(RHD
model)
I
Harness 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 “LOCK” position.
2. Check harness continuity between
engine coolant temperature sensor
connector terminal
q
2
and ECM termi-
nal
334
. Refer to wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
E
NG
Check the following:
I
Harness connectors
E151
,
F138
(LHD model)
E151
,
M843
(RHD
model)
I
Harness 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-387.
OK
E
NG
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 SEN
TD27Ti
EC-386
Component Inspection
ENGINE COOLANT TEMPERATURE SENSOR
Check resistance as shown in the figure.
Temperature °C (°F)
Resistance k
Ω
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 SEN
TD27Ti
EC-387
Component Description
ACCELERATOR WORK UNIT
The accelerator position sensor is installed on the upper end of the
accelerator pedal assembly. The sensor detects the accelerator
position and sends a signal to the ECM. The ECM uses the signal
to determine the amount of fuel to be injected.
The accelerator position switch is installed inside the accelerator
position sensor. This switch is used for plausibility check of the
accelerator position sensor.
On Board Diagnosis Logic
DTC
Malfunction is detected when ...
Check Items
(Possible Cause)
P0120
0403
I
An excessively low or high voltage from the sensor is
detected by the ECM.
I
Harness or connectors
(The sensor or switch circuit is open or
short-circuited.)
I
Accelerator position sensor
I
Accelerator position switch
DTC Confirmation Procedure A (For General
Plausibility)
WITH CONSULT-II
1) Turn ignition switch to “ON” position.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Depress accelerator pedal fully and keep it for at least 1 sec-
ond. Then release it and wait at least 5 seconds.
WITHOUT CONSULT-II
1) Turn ignition switch to “ON” position.
2) Depress accelerator pedal fully and keep it for at least 1 sec-
ond. Then release it and wait at least 5 seconds.
3) Turn ignition switch to “LOCK” position, wait at least 5 seconds
and then turn to “ON” position.
4) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
MEC959D
DTC P0120 ACCEL POS SENSOR
TD27Ti
EC-388
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 “ON” position.
2) Select “DATA MONITOR” 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 “LOCK” position, wait at least 5 seconds
and then turn to “ON” position.
4) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
DTC P0120 ACCEL POS SENSOR
TD27Ti
EC-389
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