Pajero II Workshop Manual 1991 · FUEL · страница 142 из 339 · Открыть оригинал PDF ↗

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OPERATION

The cam position sensor senses thetopdead
center on compression stroke, converts it into
pulse signal and inputs it to the engine control
unit,whichthen computesthefuelinjection
sequence, etc;based on the input signal.
Power tothecam position sensor is supplied
from the control relay and is earthed t0 the body:
The cam position sensor generates a pulse signal
as it repeatedly connects ad disconnectsbe-
tween
voltage supplied fromthe engine
control unit and earth:

TROUBLESHOOTING HINTS

HintIf the cam position sensor does not function
correctly; correct sequential injection isnot
madeSOthattheenginemaystall,run
irregularly at idle or fail to accelerate normally:

Hint 2: If the sensor outputs a pulse signal when the
ignition switch is turned ON (with the engine
norunning);faulty cam position sensor Or
engine control unit is suspected:

Проверка

Waveform inspection with analyzer

Measuring method

(1)Disconnect the connector of the cam position sensor; and
connect the special tool (test harness: MB991348) across
the disconnected connector parts. (Connect the tool to all
terminals

(21Connect the special patterns pick-up of the analyzer to the
terminalof the cam position sensor connector (in order to
inspect the signal waveform of the cam position sensor:)

(31 Disconnect the connector of the crank angle sensor; and
connect the special tool (test harness: MD998478) across
the disconnected connector parts.

(4)Connect the special patterns pick-up of the analyzer to the
terminalof the crank angle sensor connector (in order to
inspect the signal waveform of the crank angle sensor)

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