Engine Compression Inspection - Honda ACCORD HYBRID 2005 Service Manual

E n g i n e C o m p r e s s i o n I n s p e c t i o n
NOTE: After this inspection, you must reset the
powertrain control m o d u l e (PCM), otherwise the PCM
w i l l continue to stop the injectors f r o m functioning.
Select PCM reset using the Honda Diagnostic System
(HDS) (see page 11-4).
1. W a r m up the engine to normal operating
temperature (cooling fan comes on).
2. Turn the ignition switch OFF.
3. Connect the HDS to the data link connector (DLC)
(see page 11-3).
4. On the HDS, select PGM-FI, INSPECTION, and then
ALL INJECTORS OFF.
5. Remove the six ignition coils (see page 4-22).
6. Remove the six spark plugs.
7. Attach the compression gauge to the spark plug
hole.
8. Open the throttle fully, then crank the engine w i t h
the starter motor, and measure the compression.
Compression Pressure:
Above 930 kPa (9.5 kgf/cm 2 ,135 psi)
9. Measure the compression on the remaining
cylinders.
Maximum Variation:
Within 200 kPa (2.0 kgf/cm 2 , 28 psi)
10. If the compression is not w i t h i n specifications,
check the f o l l o w i n g items, then remeasure the
compression.
• Damaged or w o r n valves and seats
• Damaged cylinder head gaskets
• Damaged or w o r n piston rings
• Damaged or w o r n piston and cylinder bore
11. Select PCM reset (see page 11-4) to cancel the ALL
INJECTORS OFF function on the HDS.
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