Nissan X-Trail 32. Manual — part 770
P0117, P0118 ECT SENSOR
EC-209
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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4.
Check the voltage between ECT sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK ENGINE COOLANT TEMPERATURE SENSOR POWER SUPPLY-2
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between ECT sensor harness connector and ECM harness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for power supply circuit.
NO
>> Repair or replace malfunctioning part.
3.
CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between ECT sensor harness connector and ECM harness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning part.
4.
CHECK ECT SENSOR
EC-209, "Component Inspection"
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace ECT sensor. Refer to
Component Inspection
INFOID:0000000010775136
1.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
1.
Turn ignition switch OFF.
2.
Disconnect engine coolant temperature sensor harness connector.
3.
Remove engine coolant temperature sensor.
+
Ground
Voltage
ECT sensor
Connector
Terminal
F28
1
Ground
Approx. 5 V
+
−
Continuity
ECT sensor
ECM
Connector
Terminal
Connector
Terminal
F28
1
F7
31
Existed
+
−
Continuity
ECT sensor
ECM
Connector
Terminal
Connector
Terminal
F28
2
F7
25
Existed
EC-210
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
P0117, P0118 ECT SENSOR
4.
Check resistance between engine coolant temperature sensor
terminals by heating with hot water as shown in the figure.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace ECT sensor. Refer to
ECT sensor
Condition
Resistance
+
−
Terminal
1
2
Tempera-
ture [
°
C (
°
F)]
20 (68)
2.37 - 2.63 k
Ω
50 (122)
0.68 - 1.00 k
Ω
90 (194)
0.236 - 0.260 k
Ω
JMBIA0080ZZ
P0122, P0123 TP SENSOR
EC-211
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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P0122, P0123 TP SENSOR
DTC Description
INFOID:0000000010775137
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors (TP sensor 2 circuit is open or shorted.)
• Electric throttle control actuator (TP sensor 2)
FAIL-SAFE
DTC CONFIRMATION PROCEDURE
1.
CHECK DTC PRIORITY
If DTC P0122 or P0123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
2.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 8 V or more at idle.
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
.
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010775138
1.
CHECK DTC PRIORITY
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0122
TP SEN 2/CIRC-B1
(Throttle/pedal position sensor/switch “A”
circuit low)
An excessively low voltage from the TP sensor 2 is sent to ECM.
P0123
TP SEN 2/CIRC-B1
(Throttle/pedal position sensor/switch “A”
circuit high)
An excessively high voltage from the TP sensor 2 is sent to ECM.
Engine operating condition in fail-safe mode
Fail safe mode
Vehicle behavior
Others
• The ECM controls the electric throttle control actuator in regulating the throttle opening in order
for the idle position to be within +10 degrees.
• The ECM regulates the opening speed of the throttle valve to be slower than the normal con-
dition. So, the acceleration will be poor.
NOTE:
If throttle position sensor1 and 2 malfunction at the same time conducts following control.
• ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed
opening (approx. 5 degrees) by the return spring.
EC-212
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
P0122, P0123 TP SENSOR
If DTC P0122 or P0123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
NO
>> GO TO 2.
2.
CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect electric throttle control actuator harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between electric throttle control actuator harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for power supply circuit.
NO
>> Repair or replace malfunctioning part.
4.
CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning part.
5.
CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
+
Ground
Voltage
Electric throttle control actuator
Connector
Terminal
F29
2
Ground
Approx. 5 V
+
−
Continuity
Electric throttle control actu-
ator
ECM
Connector
Terminal
Connector
Terminal
F29
2
F8
60
Existed
+
−
Continuity
Electric throttle control actu-
ator
ECM
Connector
Terminal
Connector
Terminal
F29
4
F8
75
Existed
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