![](../../../img/11/AK601263AC00ENG.png)
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1.Before inspection, set the
vehicle to the pre-inspection
condition. 2.Disconnect the spark plug
cables. 3.Remove all of the spark
plugs. 4.Disconnect the crank angle sensor
connector.
note |
Doing this will prevent the
engine-ECU from carrying out ignition and fuel
injection.
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caution |
- Keep away from the spark
plug hole when cranking.
- If compression is measured with water,
oil, fuel, etc., that has come from
cracks
inside the cylinder, these materials
will become heated and will gush out
from the spark plug
hole, which is dangerous.
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5.Cover the spark plug hole with a shop towel
etc., and after the engine has been cranked,
check that no foreign material is adhering to the shop
towel.
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![](../../../img/11/AKX00436AC00ENG.png)
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6.Set compression gauge to
one of the spark plug holes. 7.Crank the engine
and measure the compression
pressure. Standard value (at engine speed of
250 r/min): Limit
(at engine speed of 250 r/min): 8.Measure the compression
pressure for all the cylinders, and check that the pressure
differences of the cylinders are below the
limit. Limit: Maximum 98 kPa 9.If
there is a cylinder with compression or a compression
difference that is outside
the limit, pour a small amount of engine oil through the
spark plug hole, and repeat the operations
in steps from 6 to 8. (1)
If the compression increases after oil is added, the cause
of the malfunction is a
worn or damaged piston ring and/or cylinder inner
surface. (2)
If the compression dose not rise after oil is added, the
cause is a burnt or defective
valve seat, or pressure is leaking from the
gasket. 10.Connect the crank angle sensor
connector. 11.Install the spark plugs and spark
plug cables. 12.Use the M.U.T.-III to erase the
diagnosis codes.
note |
This will erase the diagnosis
code resulting from the crank angle sensor
connector being disconnected.
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