Compression Check: Testing and Inspection
8. INSPECT COMPRESSIONa. Remove the windshield wipe link assembly.
b. Remove the cowl top panel outer front
c. Set the vehicle to inspection mode.
d. Warm up the engine.
e. Remove the air cleaner assembly.
f. Disconnect all the fuel injector connectors.
g. Disconnect the 4 ignition coil connectors and remove the 4 bolts. Then remove the 4 ignition coils.
NOTICE: If inspecting the compression with the ignition coil connector disconnected, a DTC will be detected. After the inspection, check the DTC.
h. Remove all the spark plugs.
i. Insert a compression gauge.
j. Connect the hand-held tester to the DLC3.
k. Turn the power switch ON (IG).
l. Select the item: DIAGNOSIS / OBD/MOBD / HV ECU / ACTIVE TEST / CRANKING RQST
m. Turn the power switch ON with depressing the brake pedal. Then, measure the compression pressure of each cylinder.
Compression pressure: 882 kPa (9.0 kgf/cm2, 128 psi)
Minimum pressure: 686 kPa (7.0 kgf/cm2, 99 psi)
Difference between each cylinder: 98 kPa (1.0 kgf/cm2, 14 psi)
NOTICE:
^ Measure the compression pressure as quickly as possible.
^ After performing all the procedures, be sure to clear DTCs stored in the memory. Then check that the normal code is output.
If the compression pressure is low, pour a light coat of engine oil into the cylinder block, then measure the compression pressure again.
HINT:
^ If the compression increases after pouring engine oil, the piston ring may be damaged.
^ If the compression does not change after pouring engine oil, defects may be occurring around the valve.
n. Install all the spark plugs.
Torque: 18 Nm (184 kgf-cm, 13 ft. lbs.)
o. Install the 4 ignition coil connectors.
Torque: 9.0 Nm (92 kgf-cm, 80 inch lbs.)
p. Connect the 4 ignition coil connectors.
q. Connect all the fuel injector connectors.
r. Install the air cleaner assembly.
s. Install the cowl top panel outer front.
t. Install the windshield wipe link assembly