Scheme 385
Scheme 385: ON-VEHICLE INSPECTION
Scheme 386
Scheme 387
- INSPECT ENGINE COOLANT
- INSPECT ENGINE OIL
- INSPECT BATTERY
- INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Remove the air cleaner cap. Remove the air filter element. Visually check that the air filter is not excessively damaged or oily. If necessary, replace the air filter.
- INSPECT SPARK PLUG (See «IGNITION COIL AND SPARK PLUG»(/toyota/corolla/x-2006-2010/remont/testing-diagnostics/#engine-control-system-2zr-fe) )
- INSPECT V-RIBBED BELT (See «ON-VEHICLE INSPECTION»(ref-338644-S13552867762009082800000) )
- INSPECT VALVE AND ADJUSTER NOISE Rev up the engine several times. Check that the engine does not emit unusual noises. If unusual noises occur, warm up the engine and idle it for over 30 minutes. Then perform the inspection above again. If any defects or problems are found during the inspection above, perform a lash adjuster inspection (See «INSPECTION»(ref-338644-S13252952742009082800000) ).
- INSPECT IGNITION TIMING When using the Techstream: Warm up and stop the engine. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Enter Data List Mode on the Techstream. HINT: Refer to the Techstream operator's manual for further details. Inspect the ignition timing at idle. Ignition timing: 8 to 12 degrees BTDC NOTE: Turn all the electrical systems and the A/C off. Inspect the ignition timing with the cooling fans off. When checking the ignition timing, shift the transmission to the neutral position. Enter the following menus: TC (TE1) / OFF. Turn the ignition switch off. Disconnect the Techstream from the DLC3. When not using the Techstream: Remove the No. 2 cylinder head cover (See step 10 ). Pull out the wire harness (brown) as shown in the illustration. NOTE: After checking, wrap the wire harness with tape. Warm up and stop the engine. Connect the clip of the timing light to the wire harness. NOTE: Use a timing light that detects the primary signal. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3. SST 09843-18040 NOTE: Examine the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine. Inspect the ignition timing at idle. Ignition timing: 8 to 12 degrees BTDC NOTE: Turn all the electrical systems and the A/C off. Inspect the ignition timing with the cooling fans off. When checking the ignition timing, shift the transmission to either neutral or park. Disconnect SST from terminals 13 (TC) and 4 (CG) of the DLC3. Turn the ignition switch off. Remove the timing light. Install the No. 2 cylinder head cover (See step 85 ).
- INSPECT ENGINE IDLE SPEED Warm up and stop the engine. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Enter Data List Mode on the Techstream. HINT: Refer to the Techstream operator's manual for further details. Inspect the engine idle speed. Idle speed: 600 to 700 rpm NOTE: Turn all the electrical systems and the A/C off. Inspect the idle speed with the cooling fans off. When checking the idle speed, shift the transmission to either neutral or park. Turn the ignition switch off. Disconnect the Techstream from the DLC3.
- INSPECT COMPRESSION Warm up and stop the engine. Remove the No. 2 cylinder head cover (See step 10 ). Remove the 4 ignition coils. Remove the 4 spark plugs (See «IGNITION COIL AND SPARK PLUG»(/toyota/corolla/x-2006-2010/remont/testing-diagnostics/#engine-control-system-2zr-fe) ). Disconnect the 4 fuel injector connectors. Inspect the cylinder compression pressure. Insert a compression gauge into the spark plug hole. Fully open the throttle. While cranking the engine, measure the compression pressure. Compression: 1373 kPa (14.0 kgf/cm 2 , 199 psi) Minimum pressure: 1079 kPa (11.0 kgf/cm 2 , 157 psi) Difference between each cylinder: 98 kPa (1.0 kgf/cm 2 , 14.2 psi) or less NOTE: Use a fully-charged battery so the engine speed can be increased to 250 rpm or more. Inspect the other cylinders in the same way. Measure the compression in as short time as possible. If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole, then inspect it again. HINT: If adding oil increases the compression, the piston rings and/or cylinder bore may be worn or damaged. If the pressure stays low, the valve may be stuck or seated improperly, or there may be leakage from the gasket. Connect the 4 fuel injector connectors. Install the 4 spark plugs (See «INSTALLATION»(/toyota/corolla/x-2006-2010/remont/testing-diagnostics/#engine-control-system-2zr-fe) ). Install the 4 ignition coils. Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) Install the No. 2 cylinder head cover (See step 85 ).
- INSPECT CO/HC HINT: This check determines whether or not the idle CO/HC complies with local regulations. Start the engine. Run the engine at 2500 rpm for approximately 180 seconds. Insert the CO/HC meter testing probe at least 40 cm (1.3 ft.) into the tailpipe while idling. Check the CO/HC concentration during idle and when the engine is running at 2500 rpm. HINT: When doing the 2 mode (with the engine idling/running at 2500 rpm) test, the measuring procedures are determined by applicable local regulations. If the CO/HC concentration does not comply with local regulations, troubleshoot in the order given below. Check the A/F sensor and heated oxygen sensor operation. See the table below for possible causes, then inspect the applicable parts and repair them if necessary. PROBLEM REFERENCE CHART CO HC Problem Possible Cause Normal High Rough idle Faulty ignition: Incorrect timing Fouled, shorted or improperly gapped plugs Incorrect valve clearance Leakage from intake and exhaust valves Leakage from cylinders Low High Rough idle (Fluctuating HC reading) Vacuum leaks: PCV hoses Intake manifold Throttle body Brake booster line Lean mixture causing misfire High High Rough idle (Black smoke from exhaust) Restricted air cleaner filter element Plugged PCV valve Faulty EFI system: Faulty pressure regulator Faulty engine coolant temperature sensor Faulty mass air flow meter Faulty ECM Faulty injectors Throttle body
Scheme 388
