Nissan Primera P11. Instruction — part 232
Component Description
NCEC0066
The intake air temperature sensor is built into the mass air flow
sensor. The sensor detects intake air temperature and transmits a
signal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive
to the change in temperature. Electrical resistance of the thermistor
decreases in response to the temperature rise.
<Reference data>
Intake air temperature
°C (°F)
Resistance
k
Ω
20 (68)
2.2 - 2.6
80 (176)
0.31 - 0.37
*: These data are reference values and are measured between ECM terminal 64
(Intake air temperature sensor) and ECM terminal 48 (ECM ground).
On Board Diagnosis Logic
NCEC0067
DTC No.
Malfunction is detected when ...
Check Items (Possible Cause)
P0110
0110
An excessively low or high voltage from the sensor is sent
to ECM.
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
Intake air temperature sensor
DTC Confirmation Procedure
NCEC0068
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 9 seconds
before conducting the next test.
With CONSULT-II
1)
Turn ignition switch “ON”.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Wait at least 5 seconds.
4)
If 1st trip DTC is detected, go to “Diagnostic Procedure”, EC-
SR-129.
With GST
Follow the procedure “With CONSULT-II” above.
SEF987W
SEF012P
NEF068A
DTC P0110 INTAKE AIR TEMPERATURE SENSOR
SR20DE
Component Description
EC-127
Wiring Diagram
NCEC0069
YEC830
INTAKE AIR
TEMPERATURE
SENSOR
: Detectable line for DTC
: Non-detectable line for DTC
: Hyper CVT models
ECM
DTC P0110 INTAKE AIR TEMPERATURE SENSOR
SR20DE
Wiring Diagram
EC-128
Diagnostic Procedure
NCEC0070
1
CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect mass air flow sensor harness connector.
SEF203X
3. Turn ignition switch “ON”.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester.
NEF228A
Voltage: Approximately 5V
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 2.
2
DETECT MALFUNCTIONING PART
Check the following.
I
Harness for open or short between ECM and intake air temperature sensor
©
Repair harness or connectors.
Mass air flow sensor
harness connector
Air cleaner
DTC P0110 INTAKE AIR TEMPERATURE SENSOR
SR20DE
Diagnostic Procedure
EC-129
3
CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Check harness continuity between intake air temperature sensor (mass air flow sensor) harness connector terminal 3 and ECM termi-
nal 73.
Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 4.
4
DETECT MALFUNCTIONING PART
Check the following.
I
Harness for open or short between ECM and intake air temperature sensor
©
Repair open circuit or short to ground or short to power in harness or connectors.
5
CHECK INTAKE AIR TEMPERATURE SENSOR
Refer to “Component Inspection”, EC-SR-131.
OK or NG
OK
©
GO TO 6.
NG
©
Replace mass air flow sensor.
6
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-SR-114.
©
INSPECTION END
DTC P0110 INTAKE AIR TEMPERATURE SENSOR
SR20DE
Diagnostic Procedure (Cont’d)
EC-130
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