Item
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Trouble Symptom
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Inspection Procedure No.
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Communication with M.U.T.-III is impossible
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The communication between M.U.T.-III and engine-ECU
is not possible.
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1
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![](../../../buttons/03btn007.png)
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Engine warning lamp
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The engine warning lamp does not illuminate right after
the ignition switch is turned to "ON" position.
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2
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![](../../../buttons/03btn007.png)
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The engine warning lamp remains illuminating and never goes
out.
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3
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![](../../../buttons/03btn007.png)
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Starting
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Starting impossible (starter not operative)
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The starter is not operable.
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4
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![](../../../buttons/03btn007.png)
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Starting impossible (starter operative but no initial combustion)
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The starter is operative and cranks the engine, but no initial combustion
occurs in the cylinders to start the engine.
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5
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![](../../../buttons/03btn007.png)
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Starting impossible (initial combustion but no complete combustion)
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Initial combustion occurs, but the engine stalls soon due to the incomplete
combustion.
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6
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![](../../../buttons/03btn007.png)
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Improper starting (long time to start)
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The engine starts, but it takes too long for cranking.
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Improper idling
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Unstable idling (rough idling, hunting)
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The engine speed is not constant and fluctuates during the idling. Usually,
this malfunction can be judged from the shaking tachometer pointer or vibrations transmitted
to the steering wheel, shift lever, vehicle body and so on.
|
7
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![](../../../buttons/03btn007.png)
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Improper idling speed (too high or too low)
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The idling speed is not within the normal range.
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Engine stalls during idling (die out)
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The engine stalls during the idling in no relation to the vehicle movement.
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Engine stalls
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The engine stalls when starting the car (pass out)
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The engine stalls when the accelerator pedal is depressed in the
idling speed, or during the operation.
|
8
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![](../../../buttons/03btn007.png)
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Engine stalls at deceleration
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The engine stalls at the deceleration.
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Driving
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Engine does not revolve up
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The engine speed does not increase even when the accelerator pedal
is depressed.
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9
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![](../../../buttons/03btn007.png)
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Hesitation, sag
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The response of vehicle speed (engine speed) is delayed when the
accelerator pedal is depressed to accelerate vehicle speed, or the vehicle speed (engine speed)
is temporarily dropped during the acceleration. This phenomenon is called "hesitation" and a serious hesitation is called "sag".
|
10
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![](../../../buttons/03btn007.png)
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Poor acceleration
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The engine operates smoothly at a constant-speed run, but the vehicle
does not accelerate properly as the throttle valve opening changes. In addition, vehicle will
not run in the specified maximum speed.
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Stumble
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The engine speed increase is delayed when the accelerator pedal is
initially depressed at the starting.
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Surge
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At a constant-speed or acceleration the vehicle is subject to repeated
jerking (in terms of the drive speed) in the driving direction.
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The feeling of impact or vibration when accelerating
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The driver feels a sudden impact when the vehicle is accelerated.
|
11
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![](../../../buttons/03btn007.png)
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The feeling of impact or vibration when decelerating
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The driver feels a sudden impact when the vehicle is decelerated.
|
12
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![](../../../buttons/03btn007.png)
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Knocking
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Sharp sound like a hammer striking on the cylinder walls during the
driving can be heard and wrongly affects the driving.
|
13
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![](../../../buttons/03btn007.png)
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Ignition timing deviation
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The basic ignition timing is deviated from the datum value.
|
14
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![](../../../buttons/03btn007.png)
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Stopping
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Run on (dieseling)
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The engine continues to run after the ignition switch is in "LOCK" (OFF)
position.
|
15
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![](../../../buttons/03btn007.png)
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Exhaust gas
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Odour, white smoke, black smoke and high-concentration CO/HC during
idling.
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The exhaust has an abnormal odour. Either white or black exhaust
gas comes out. The concentration of CO/HC is high during the idling.
|
16
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![](../../../buttons/03btn007.png)
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Charging performance
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Battery run down
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The battery is soon rundown. Or, the charging ability of battery is small.
|
17
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![](../../../buttons/03btn007.png)
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Cooling performance
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Overheating
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The temperature of engine cooling water is extremely high.
|
18
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![](../../../buttons/03btn007.png)
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Engine-ECU power supply, engine control relay, ignition
switch - IG1 system
|
19
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![](../../../buttons/03btn007.png)
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Fuel pump system
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20
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![](../../../buttons/03btn007.png)
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Ignition circuit system
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21
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![](../../../buttons/03btn007.png)
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Blower switch system
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22
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![](../../../buttons/03btn007.png)
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A/C compressor relay system
|
23
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![](../../../buttons/03btn007.png)
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Power steering fluid pressure switch system
|
24
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![](../../../buttons/03btn007.png)
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A/C condenser fan relay system <Vehicles with
condenser fan>
|
25
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![](../../../buttons/03btn007.png)
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Engine oil pressure switch system
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26
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![](../../../buttons/03btn007.png)
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