Pajero II Workshop Manual 1998 Supplement · FUEL · страница 55 из 104 · Открыть оригинал PDF ↗

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OPERATION

The cam position sensor senses the top dead
center on compression stroke, converts it into
pulse signal and inputs it to the engine
control unit, which then computes the fuel
injection sequence , etc_based on the input

signal:

Power to the cam position sensor is supplied
from the control relay and is earthed to the
body. The cam position sensor generates
pulsesignal as it repeatedly connects and
disconnects between 5 V voltage supplied
from the engine control unit and earth

TROUBLESHOOTING HINTS

Hint 1; If the cam position sensor does not function
correctly, correct sequential injection is not
made so that the enginemaystall, run
irregularly at idle or fail to accelerate
normally:

Hint 2: If the sensor outputspulse signal when
the ignition switch is turned ON (with the
engine no running),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

(2)Connect the special patterns pick-Up of the analyzer to
the terminal @) of the cam position sensor connector (in
order to inspect the signal waveform of the cam position
sensor:)

(3) 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) .

Alternative method (when test harness is not available)

(1)Connect the analyzer special patterns pickup to ECU
terminal (88) for the cam position sensor:

(2) Connect the analyzer special patterns pickup to ECU
terminal (89) for the crank angle sensor:

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