2003 NISSAN TEANA Service Manual

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Page 1409 of 3502

NISSAN TEANA 2003 Service Manual DTC P0102, P0103 MAF SENSOR
EC-127
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals

Page 1410 of 3502

NISSAN TEANA 2003 Service Manual EC-128
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DTC P0102, P0103 MAF SENSOR

3. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
Refer to E C - 111 , "
Ground Inspection" .
O

Page 1411 of 3502

NISSAN TEANA 2003 Service Manual DTC P0102, P0103 MAF SENSOR
EC-129
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6. CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check har

Page 1412 of 3502

NISSAN TEANA 2003 Service Manual EC-130
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DTC P0102, P0103 MAF SENSOR

Crushed air ducts
Malfunctioning seal of air cleaner element
Uneven dirt of air cleaner element
Improper specification of intake air system parts
b. If NG

Page 1413 of 3502

NISSAN TEANA 2003 Service Manual DTC P0117, P0118 ECT SENSOR
EC-131
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DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionBBS005D6
The engine coolant temperature sensor is used to detect the engin

DTC P0117, P0118 ECT SENSOR
EC-131
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DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionBBS005D6
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.

*: These data are reference values and are measured between ECM terminal 72
(Engine coolant temperature sensor) and ground.
CAUTION:
Do not 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 LogicBBS005D7
FAIL-SAFE MODE
When this malfunction is detected, the ECM enters fail-safe mode.
SEF594K
Engine coolant
temperature°C (°F)Voltage* V Resistance kΩ
−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
NameDTC Detecting Condition Possible Cause
P0117
0117Engine coolant
temperature sen-
sor circuit low inputAn 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
0118Engine coolant
temperature sen-
sor circuit high
inputAn excessively high voltage from the sensor is
sent to ECM.
Detected items Engine operating condition in fail-safe mode
Engine coolant temper-
ature sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning ignition switch ON
or START. CONSULT-II displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned ON or START 40°C (104°F)
More than approx. 4 minutes after ignition ON or
START80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling fan operates
while engine is running.

Page 1414 of 3502

NISSAN TEANA 2003 Service Manual EC-132
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DTC P0117, P0118 ECT SENSOR

DTC Confirmation ProcedureBBS005D8
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 sec

Page 1415 of 3502

NISSAN TEANA 2003 Service Manual DTC P0117, P0118 ECT SENSOR
EC-133
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Wiring DiagramBBS005D9
TBWH0176E

Page 1416 of 3502

NISSAN TEANA 2003 Service Manual EC-134
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DTC P0117, P0118 ECT SENSOR

Diagnostic ProcedureBBS005DA
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
Refer to E C - 11

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