Nissan Rogue Service Manual: Compression pressure
CHECKING COMPRESSION PRESSURE
- Warm up the engine to full operating temperature.
- Release the fuel pressure. Refer to EC-144, "Work Procedure".
- Remove the ignition coil and spark plug from each cylinder. Refer
to EM-36, "Removal and Installation"
and EM-17, "Removal and Installation".
- Connect engine tachometer (not required in use of CONSULT).
- Disconnect the fuel injector harness connector to avoid any
residual fuel injection during the measurement.
- Install the compression tester with the adapter into the spark
plug hole.

- Use compression tester whose end (a) (rubber portion) is smaller
than 20 mm (0.79 in) in diameter. Otherwise, it may be caught by
cylinder head during removal.

- With the accelerator pedal fully depressed, turn the ignition switch to
the “START” position to crank over
the engine. When the gauge pointer stabilizes, read the compression pressure
and engine rpm. Perform
these steps to check each cylinder.

CAUTION:
Always use a fully charged battery to obtain specified engine cranking speed.
- If the engine speed is out of specified rpm range, check the
battery. Check engine speed again with a fully
charged battery.
- If compression pressure is below minimum value, check valve
clearances and parts associated with combustion
chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder
head, cylinder head gasket).
After the checking, measure compression pressure again.
- If some cylinders have low compression pressure, pour small amount
of engine oil into the spark plug hole of
the cylinder to re-check it for compression.
- If the added engine oil improves the compression, the piston rings
may be worn or damaged. Check the piston
rings and replace if necessary.
- If the compression pressure remains at low level despite the
addition of engine oil, the valves may be malfunctioning.
Check the valves for damage. Replace the valve or valve seat accordingly.
- If two adjacent cylinders have respectively low compression pressure and
their compression remains low
even after the addition of engine oil, the head gasket is leaking. In such a
case, replace the cylinder head
gasket.
- Install spark plug, ignition coil and harness connectors. Refer to
EM-17, "Removal and Installation".
Camshaft valve clearance
Perform this inspection as follows after removal, installation, or
replacement of the camshaft or any valve
parts, or if there are any unusual engine conditions due t ...
Other materials:
Idle air volume learning
Description
Idle Air Volume Learning is a function of ECM to learn the idle air volume
that keeps each engine idle speed
within the specific range. It must be performed under any of the following
conditions:
Each time electric throttle control actuator or ECM is replaced.
Idle spee ...
Seat belt warning system
Seat Belt Warning System Does Not Function
1.SEAT BELT WARNING LIGHT
Turn ignition switch ON.
Does the seat belt warning lamp come ON?
YES >> GO TO 2.
NO >>
Check 10A fuse [No. 13, located in the fuse block (J/B)].
Check seat belt buckle switch (driver seat).
...
ECU diagnosis information
AUDIO UNIT
Reference Value
TERMINAL LAYOUT
PHYSICAL VALUES
...
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