IDLE SPEED CONTROL SERVO (STEPPER MOTOR) · 69

IDLE SPEED CONTROL SERVO (STEPPER MOTOR) · 69

Pajero II Workshop Manual 1991 · FUEL · страница 69 из 339 · Открыть оригинал PDF ↗

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TROUBLESHOOTING HINTS

Hint 1:

If thenumber steppermotor steps increases to
100-120 steps or decreases to 0 step, the cause
maybe presumedtobemalfunctionofthe
Ordamaged or disconnected wiring
stepper moto
of the harness_

Hint 2:

Ifthenumberof steppermotorstepsdeviates
fromthe standard value even through the results
of the checking of the harness of the idle-speed
control servo and of the component itself indicate
noabnormalcondition,thecausemaybe
presumed to be one of the following

(1) Improperadjustmentofthestandardidling
speed.

(21Depossits adhered to the throttle valve_

(31 Leakage of air into the intake manifold from
gasket gap, etc.

(4) Incompletecombustionwithinthecylinder_
(Malfunctionofthespark plugs,the ignition
coil,the injectors, the compressionpressure
etc )

Проверка

Using Multi-use tester (MUT)

Таблица в оригиналеТаблица: оригинал страницы 69
Распознанный текст таблицы — требует сверки с оригиналом
FunctionItem No_Data displayCheck conditionsLoad conditionsStandard value
STP
Data reading45Stepper
motor steps
Engine coolant temperature:
85-958C (185-2059F)
ih d i
Air conditioner
switch: OFF
2-12
Lgts an accessores: OFF
Transmission: neutral (P
range for vehicles with AVT)
'Air conditioner
switch: ON
30-70
Steering wheel: neutral
position
idle-position switch: ON
(The compressor clutch
should be actived when the
air conditioner switch
switched ON )
Engine: idling
Air conditioner
switch: ON
Selector lever:
shift to
range
20-60

NOTE

When the vehicle is new [driven approximately 500 km (300 miles) or less] the number of steps may
be about 30 steps greater than the standard value indicated above

Caution

Whentheselect leveris shiftedto the"D"range, thebrakesmustbeusedto prevent the
vehicle from moving forward

Иллюстрация 1, страница 69

Wave Pattern Inspection Using an Analyzer Observation method

(1)Disconnectthe steppermotorconnector,andconnect
the special tool (test harness: MB998463) in between:

(2) Connect the analyzer special patterns pickup to the step
per motor-side connector terminal(red clip on the spe-
cial tool) , terminal(green clip) , terminal(black clip)
and terminal 0 (yellow clip) respectively

Иллюстрация 2, страница 69
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