On-vehicle
8. If the standard value is exceeded, check the following
items:
l Diagnostic output
l Closed-loop control (When the closed-loop control
is carried out normally, the output signal of the heated
oxygen sensor repeats between and
,000 at idle.)
l Fuel pressure
Injector
l
Ignition coil, spark plug cable, spark plug
l
EGR system and the EGR valve leak
l Evaporative emission control system
Compression pressure
NOTE
Replace the catalyst whenever the
HC contents do not remain inside the standard value.
(even though the result of the inspection is
all items.)
.
COMPRESSION CHECK
1.
Before inspection, check that the engine-oil, starter
battery are normal. Also, set the to the
condition:
l
Engine coolant temperature:
l
Lights, electric cooling fan and all accessories: OFF
l
Transaxle: Neutral (P range on vehicles with
2. Disconnect the spark plug cables.
3. Remove all of the spark plugs.
4.
5.
Disconnect the crankshaft position sensor connector.
NOTE
Doing this will prevent the engine control unit from carrying
out ignition and fuel injection.
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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