Infiniti G35 (V35). Manual — part 337
DTC P0117, P0118 ECT SENSOR
EC-229
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EC
Wiring Diagram
NBS000PN
TBWM0331E
EC-230
DTC P0117, P0118 ECT SENSOR
Diagnostic Procedure
NBS000PO
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten two ground screws on the body. Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect engine coolant temperature (ECT) sensor harness
connector.
2.
Turn ignition switch ON.
3.
Check voltage between ECT sensor terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
PBIB2192E
PBIB2208E
Voltage: Approximately 5V
PBIB0080E
DTC P0117, P0118 ECT SENSOR
EC-231
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EC
3.
CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECT sensor terminal 2 and ECM terminal 67.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to
EC-231, "Component Inspection"
OK or NG
OK
>> GO TO 5.
NG
>> Replace engine coolant temperature sensor.
5.
CHECK INTERMITTENT INCIDENT
Refer to
EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Component Inspection
NBS000PP
ENGINE COOLANT TEMPERATURE SENSOR
1.
Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.
<Reference data>
2.
If NG, replace engine coolant temperature sensor.
Removal and Installation
NBS000PQ
ENGINE COOLANT TEMPERATURE SENSOR
Refer to
CO-30, "WATER OUTLET AND WATER PIPING"
Continuity should exist.
PBIB2005E
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-232
DTC P0122, P0123 TP SENSOR
DTC P0122, P0123 TP SENSOR
PFP:16119
Component Description
NBS000PR
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.
CONSULT-II Reference Value in Data Monitor Mode
NBS000PS
Specification data are reference values.
*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.
On Board Diagnosis Logic
NBS000PT
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
PBIB0145E
MONITOR ITEM
CONDITION
SPECIFICATION
THRTL SEN 1
THRTL SEN 2*
●
Ignition switch: ON
(Engine stopped)
●
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0122
0122
Throttle position sensor
2 circuit low input
An excessively low voltage from the TP sensor
2 is sent to ECM.
●
Harness or connectors
(The TP sensor 2 circuit is open or
shorted.)
(The APP sensor 2 circuit is shorted.)
●
Electric throttle control actuator
(TP sensor 2)
●
Accelerator pedal position sensor
(APP sensor 2)
P0123
0123
Throttle position sensor
2 circuit high input
An excessively high voltage from the TP sen-
sor 2 is sent to ECM.
Engine operation condition in fail-safe mode
ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.
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