Civic L4-1.3L Hybrid (2008)
Compression Check: Testing and Inspection
Engine Compression Inspection
NOTE: After the inspection, you must reset the powertrain control module (PCM). Otherwise, the PCM will continue to stop the fuel injectors from
operating.
1. Warm up the engine to normal operating temperature (cooling fan comes on).
2. Turn the ignition switch to LOCK (0).
3. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC).
4. Turn the ignition switch to ON (II).
5. Make sure the HDS communicates with the vehicle and the PCM. If it doesn't communicate, troubleshoot the DLC circuit.
6. Select PGM-FI, INSPECTION, then All INJECTORS OFF on the HDS.
7. Turn the ignition switch to LOCK (0).
8. Remove the four intake side ignition coils.
9. Remove the four intake side spark plugs.
10. Attach the compression gauge to a spark plug hole.
NOTE: Use a compression gauge with a connecting length (between the edge and the flange) of less than 23 mm (0.9 in.).
11. Turn the IMA battery module switch OFF.
12. Open the throttle fully, then crank the engine with the starter motor and measure the compression.
Compression Pressure:
Above 980 kPa (10.0 kgf/cm2, 142 psi)
13. Measure the compression on the remaining cylinders.
Maximum Variation:
Within 200 kPa (2.0 kgf/cm2, 28 psi)
14. If the compression is not within specifications, check the following items, then remeasure the compression.
^
Looseness exhaust side spark plug
^
Damaged or worn valves and seats
^
Damaged cylinder head gasket
^
Damaged or worn piston rings
^
Damaged or worn piston and cylinder bore
15. Remove the compression gauge from the spark plug hole.
16. Install the four intake side spark plugs.
17. Install the four intake side ignition coils.
18. Select PCM reset to cancel the ALL INJECTORS OFF on the HDS.
19. Do the PCM idle learn procedure.
20. Do the start clutch pressure control calibration procedures.
21. Turn the IMA battery module switch ON.
22. Clear any IMA DTCs that may have been set while doing this inspection procedure.
23. If the IMA battery level gauge (BAT) displays no segment, start the engine, and hold it between 3,500 rpm and 4,000 rpm without load (in N or P)
until the BAT displays at least three segments.
