ENGINE ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT ENGINE COOLANT

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2. INSPECT ENGINE OIL

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3. INSPECT BATTERY

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4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

   1. Remove the air cleaner case sub-assembly.

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   2. Remove the air cleaner filter element sub-assembly.

   3. Visually check that the air cleaner filter element sub-assembly is not excessively damaged or oily.

      If necessary, replace the air cleaner filter element sub-assembly.

      Tip:

      • If there is any foreign matter or clogs in the air cleaner filter element sub-assembly, clean it with compressed air.

      • If any foreign matter or clogs remain even after cleaning the air cleaner filter element sub-assembly with compressed air, replace it.

   4. Install the air cleaner filter element sub-assembly.

   5. Install the air cleaner case sub-assembly.

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5. INSPECT SPARK PLUG

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6. INSPECT FAN AND GENERATOR V BELT

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7. INSPECT VALVE CLEARANCE

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8. INSPECT COMPRESSION

   Note:

   Keep the spark plug holes free of foreign matter when measuring the compression pressure.

   1. Check for DTCs.

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   2. Warm up and stop the engine.

   3. Remove the 3 spark plugs.

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   4. Disconnect the 3 fuel injector connectors.

      Note:

      Disable fuel injection in order to prevent catalyst damage due to unburned gasoline.

   5. 

      Inspect the cylinder compression pressure.

      1. Insert a compression gauge into the spark plug hole.

      2. Fully open the throttle.

      3. While cranking the engine, measure the compression pressure.

         Pressure Difference between each Cylinder

         500 kPa (5.1 kgf/cm², 73 psi) or less

         Note:

         • Use a fully-charged battery to obtain an engine speed of 250 rpm or more.

         • Inspect the other cylinders in the same way.

         • Measure the compression pressure as quickly as possible.

      4. If the cylinder compression pressure is low, pour a small amount of engine oil into the cylinder through the spark plug hole, then inspect it again.

         Tip:

         • If adding oil increases the compression pressure, the piston rings and/or cylinder bore may be worn or damaged.

         • If the compression pressure stays low, a valve may be stuck or seated improperly, or there may be leaks in the gasket.

   6. Connect the 3 fuel injector connectors.

   7. Install the 3 spark plugs.

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   8. Clear the DTCs.

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      Note:

      After the inspection, clear the DTCs, check for DTCs again and make sure the normal system code is output.