Nissan Frontier D40. Instruction — part 472
P0116 ECT SENSOR
EC-579
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0116 ECT SENSOR
Component Description
INFOID:0000000005273541
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.
<Reference data>
*: This data is reference value and is measured between ECM terminal 73 (Engine
coolant temperature sensor) and ground.
CAUTION:
Never 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 Logic
INFOID:0000000005273542
DTC Confirmation Procedure
INFOID:0000000005273543
NOTE:
• If DTC P0116 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117,
P0118. Refer to
EC-583, "DTC Confirmation Procedure"
.
• If DTC Confirmation Procedure has been previously conducted, always perform the following before con-
ducting the next step.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, never fill with the fuel.
1.
Start engine and warm it up to normal operating temperature.
2.
Rev engine up to 2,000 rpm for more than10 minutes.
3.
Move the vehicle to a cool place, then stop engine and turn ignition switch OFF.
4.
Check resistance between “fuel level sensor and fuel pump” terminals 3 and 4.
5.
Soak the vehicle until the resistance between “fuel level sensor and fuel pump” terminals 3 and 4
becomes 0.5 k
Ω
higher than the value measured before soaking.
SEF594K
Engine coolant
temperature
°
C (
°
F)]
Voltage*
(V)
Resistance
(k
Ω
)
−
10 (14)
4.4
7.0 - 11.4
20 (68)
3.5
2.1 - 2.9
50 (122)
2.2
0.68 - 1.00
90 (194)
0.9
0.236 - 0.260
SEF012P
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0116
0116
Engine coolant tempera-
ture sensor circuit range/
performance
Engine coolant temperature signal from engine
coolant temperature sensor does not fluctuate,
even when some time has passed after starting
the engine with pre-warming up condition.
• Harness or connectors
(High or low resistance in the circuit)
• Engine coolant temperature sensor
EC-580
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0116 ECT SENSOR
CAUTION:
Never turn ignition switch ON during the soaking time.
NOTE:
Soak time changes depending on ambient air temperature. It may take several hours.
6.
Start engine and let it idle for 20 minutes.
7.
Check 1st trip DTC.
8.
If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000005273544
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten three ground screws on the body.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
EC-580, "Component Inspection"
OK or NG
OK
>> GO TO 3.
NG
>> Replace engine coolant temperature sensor.
3.
CHECK INTERMITTENT INCIDENT
GI-43, "How to Check Terminal"
and
GI-46, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000005273545
ENGINE COOLANT TEMPERATURE SENSOR
1.
Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.
BBIA0539E
PBIB2005E
P0116 ECT SENSOR
EC-581
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2.
If NG, replace engine coolant temperature sensor.
Engine coolant temperature
°
C (
°
F)]
Resistance
(k
Ω
20 (68)
2.1 - 2.9
50 (122)
0.68 - 1.00
90 (194)
0.236 - 0.260
SEF012P
EC-582
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0117, P0118 ECT SENSOR
P0117, P0118 ECT SENSOR
Component Description
INFOID:0000000005273546
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.
<Reference data>
*: This data is reference value and is measured between ECM terminal 73 (Engine
coolant temperature sensor) and ground.
CAUTION:
Never 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 Logic
INFOID:0000000005273547
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL illuminates.
SEF594K
Engine coolant temperature
°
C (
°
F)
Voltage*
V
Resistance
k
Ω
-10 (14)
4.4
7.0 - 11.4
20 (68)
3.5
2.1 - 2.9
50 (122)
2.2
0.68 - 1.00
90 (194)
0.9
0.236 - 0.260
SEF012P
DTC No.
Trouble Diagnosis
Name
DTC Detecting Condition
Possible Cause
P0117
0117
Engine coolant tem-
perature sensor cir-
cuit low input
An excessively low voltage from the sensor is
sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted.)
• Engine coolant temperature sensor
P0118
0118
Engine coolant tem-
perature sensor cir-
cuit high input
An excessively high voltage from the sensor is
sent to ECM.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст