MANUALS · FUEL [13] · страница 69 из 340 · Открыть оригинал PDF ↗
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TROUBLESHOOTING HINTS
Hint 1:
If thenumber steppermotor steps increasesto
100-120 steps or decreases to 0 step, the cause
maybe presumedtobemalfunction ofthe
stepper motoordamaged or disconnected wiring
of the harness
Hint 2:
Ifthenumber of steppermotor stepsdeviates
from the 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) Improperadjustmentofthe standard idling
speed.
(2) Depossits adhered to the throttle valve.
(3) Leakage of air into the intake manifold from
gasket gap, etc.
(4) Incompletecombustionwithinthe cylinder_
(Malfunctionofthe spark plugs,the ignition
coil,the injectors, the compressionpressure
etc_
Проверка
Using Multi-use tester (MUT)
Таблица в оригинале
Распознанный текст таблицы — требует сверки с оригиналом
| Function | Item No | Data display | Check conditions | Load conditions | Standard value STP |
|---|---|---|---|---|---|
| Data reading | 45 | Stepper motor steps | Engine coolant temperature: 85-959C (185-205*F) | Air conditioner switch: OFF | 2-12 |
| Lights and accessories: 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 is switched ON:) Engine: idling | Air conditioner switch: ON Selector lever: shift to D 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
Whenthe selectlever is shiftedtothe"D"range, thebrakes must beused to prevent the
vehicle from moving forward:
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 0 (red clip onthespe-
cial tool), terminal(green clip) , terminal(black clip)
and terminal(yellow clip) respectively
Оригинальная страница руководства
