Engine: Testing and Inspection
ON-VEHICLE INSPECTION1. INSPECT AIR CLEANER FILTER ELEMENT
a. Remove the air filter.
b. Visually check that the air filter is not excessively damaged or oily. If necessary, replace the air filter.
2. INSPECT IGNITION TIMING
a. Set the vehicle to inspection mode.
b. Warm up the engine.
c. Connect the intelligent tester to the DLC3.
d. Turn the power switch ON (IG).
e. Select the following items: DIAGNOSIS / ENHANCED OBD II / DATA LIST PRIMARY/ IGN ADVANCE
Standard ignition timing: 8 to 12° @ BTDC
NOTICE:
^ Turn all the electrical systems OFF.
^ Inspect the engine idle speed with the cooling fan OFF.
HINT: Refer to the intelligent tester operator's manual if you need help selecting the DATA LIST.
f. Check that the ignition timing advances immediately when the engine speed is increased.
3. INSPECT ENGINE IDLE SPEED
a. Set the vehicle to inspection mode.
b. Warm up the engine.
c. Connect the intelligent tester to the DLC3.
d. Turn the power switch ON (IG).
e. Select the following items: DIAGNOSIS / ENHANCED OBD II / DATA LIST PRIMARY/ ENGINE SPD
Standard idle speed: 950 to 1,050 rpm (P range)
NOTICE:
^ Turn all the electrical systems OFF.
^ Inspect the engine idle speed with the cooling fan OFF.
HINT: Refer to the intelligent tester operator's manual if you need help selecting the DATA LIST
4. INSPECT COMPRESSION
a. Remove the windshield wiper link.
b. Remove the front cowl top panel outer.
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. Connect SST (attachment) to a compression gauge.
SST 09992-00500
j. Install the compression gauge with SST into the spark plug hole.
k. Connect the intelligent tester to the DLC3.
l. Turn the power switch ON (IG).
m. Select the following items: DIAGNOSIS / OBD / MOBD / HV ECU / ACTIVE TEST / COMPRESS TEST
n. Turn the power switch ON (IG) while depressing the brake pedal. Then, measure the compression pressure of each cylinder.
Standard 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) or less
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, and 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.
o. Install all the spark plugs.
Torque: 18 Nm (184 kgf-cm, 13 ft. lbs.)
p. Install the 4 ignition coil connectors.
Torque: 9.0 Nm (92 kgf-cm, 80 inch lbs.)
q. Connect the 4 ignition coil connectors.
r. Connect all the fuel injector connectors.
s. Install the air cleaner assembly
t. Install the front cowl top panel outer.
u. Install the windshield wiper link.
5. INSPECT CO/HC
a. Set the vehicle to inspection mode.
b. Run the engine at 2,500 rpm for approximately 180 seconds.
c. Insert a CO/HC meter testing probe at least 40 cm (1.3 ft.) into the tailpipe during idling.
d. Immediately check the CO/HC concentration at idle and 2,500 rpm.
HINT: When performing the 2 mode (2,500 rpm and idle) test, check that the CO/HC concentration complies with local regulations.
e. If the CO/HC concentration does not comply with regulations, troubleshoot in this order:
1. Check the heated oxygen sensor operation.
2. See the table for possible causes, and then inspect the applicable causes and repair it if necessary.