Nissan Note — диагностика ошибки P1171: проблемы с впуском воздуха [654/1872]

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Nissan Note [654/1872] With consult ii
EC-654
[CR (WITHOUT EURO-OBD)]
DTC P1171 INTAKE ERROR
DTC P1171 INTAKE ERROR
PFP:22365
On Board Diagnosis Logic
BBS0039I
NOTE:
If DTC P1171 is displayed with DTC P0108, first perform the trouble diagnosis for DTC P0108.
Refer to EC-559, "
DTC P0107, P0108 MANIFOLD ABSOLUTE PRESSURE SENSOR" .
If DTC P1171 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229.
Refer to EC-680, "
DTC P1229 SENSOR POWER SUPPLY" .
ECM computes two intake air volume values.
1: Computed from manifold absolute pressure signal and intake air temperature signal.
2: Computed from engine revolution signal and throttle position signal.
In normal condition, value 1 is used for engine control.
If intake air leak occurred between throttle valve and intake air port, manifold absolute pressure sensor signal
might increase, and then ECM increases amount of fuel injected. In this case, ECM uses value 2 for engine
control instead of value1.
ECM monitors the difference between value 1 and value 2. If the difference is extremely large, ECM judges
intake air leak occurs and light up the MI
This diagnosis has one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and MI lights up.
DTC Confirmation Procedure
BBS0039J
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and wait at least 5 seconds.
4. If DTC is detected, go to EC-657, "
Diagnostic Procedure" .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1171
1171
Intake error
A high voltage from the sensor is sent to
ECM under light load driving condition.
Harness or connectors
(The manifold absolute pressure sensor
circuit is open or shorted.)
Manifold absolute pressure
Intake air leaks
Vacuum hoses
Detected items Engine operating condition in fail-safe mode
Intake air system
When accelerator pedal is depressed, engine speed will not rise more than 2,500 rpm
duetofuelcut.
SEF058Y

Содержание

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Узнайте о диагностике ошибки P1171, связанной с впуском воздуха. Пошаговые инструкции и возможные причины неисправностей для эффективного устранения проблемы.

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