Toyota Corolla Cross: On-vehicle Inspection

ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and cooling fans when working in the engine compartment with the engine running or the ignition switch ON.

PROCEDURE

1. INSPECT ENGINE COOLANT

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2. INSPECT ENGINE OIL

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3. INSPECT BATTERY CONDITION

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4. INSPECT SPARK PLUG

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5. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

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6. INSPECT V-RIBBED BELT

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7. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY

(a) Remove the V-ribbed belt.

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(b) Turn the V-ribbed belt tensioner assembly clockwise and counterclockwise and check that it turns smoothly and does not catch.

HINT:

If the V-ribbed belt tensioner assembly does not turn smoothly or catches, replace the V-ribbed belt tensioner assembly.

(c) Install the V-ribbed belt.

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8. INSPECT VALVE LASH ADJUSTER ASSEMBLY NOISE

(a) Rev up the engine several times. Check that the engine does not emit unusual noises.

(b) If unusual noises occur, warm up the engine and idle it for 30 minutes or more, then perform the inspection.

HINT:

If any defects or problems are found during the inspection, perform the valve lash adjuster assembly inspection.

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9. INSPECT IGNITION TIMING

NOTICE:

• Check the ignition timing with the cooling fan off.
• Turn off all electrical systems and the A/C.
• When checking the ignition timing, the transaxle should be in neutral or park.

(a) Warm up and stop the engine.

(b) Connect the GTS to the DLC3.

(c) Start the engine and run it at idle.

(d) Turn the GTS on.

(e) Enter the following menus: Powertrain / Engine / Data List / Ignition Timing Cylinder #1.

Standard Ignition Timing:

-3 to 3° BTDC at idle

(f) Enter the following menus: Powertrain / Engine / Active Test / Activate the TC Terminal / ON.

(g) Monitor Ignition Timing Cylinder #1 of the Data List.

Standard Ignition Timing:

8 to 12° BTDC at idle

(h) Enter the following menus: Powertrain / Engine / Active Test / Activate the TC Terminal / OFF.

(i) Check that the ignition timing advances immediately when the engine speed is increased.

10. INSPECT ENGINE IDLE SPEED

NOTICE:

• Check the engine idle speed with the cooling fan off.
• Turn off all electrical systems and the A/C.
• When checking the engine idle speed, the transaxle should be in neutral or park.

(a) Warm up and stop the engine.

(b) Connect the GTS to the DLC3.

(c) Start the engine and run it at idle.

(d) Turn the GTS on.

(e) Enter the following menus: Powertrain / Engine / Data List / Engine Speed.

(f) Read the value displayed on the tester.

Standard Idle Speed:

750 to 850 rpm

11. INSPECT COMPRESSION

NOTICE:

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

(a) Warm up and stop the engine.

(b) Check for DTCs.

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(c) Remove the 4 spark plugs.

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(d) Disconnect the fuel injector connector (for Port Injection).

(e) Remove the No. 1 radiator to support seal.

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(f) Remove the inlet No. 1 air cleaner.

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(g) Remove the 2 bolts and disengage the clamp to separate the engine wire.

(h) Remove the No. 1 engine under cover assembly.

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(i) Disconnect the fuel injector connector (for Direct Injection).

(j) Remove the air cleaner cap with air cleaner hose.

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(k) Using an 8 mm socket wrench, remove the 3 bolts to separate the throttle body with motor assembly from the intake manifold.

(l) Check the cylinder compression pressure. (1) Insert a compression gauge into the spark plug hole. (2) While cranking the engine, measure the compression pressure. Standard Compression Pressure: 1400 kPa (14.3 kgf/cm2, 203 psi) Minimum Compression Pressure: 1200 kPa (12.2 kgf/cm2, 174 psi) Pressure Difference between Each Cylinder: 200 kPa (2.0 kgf/cm2, 29 psi) or less NOTICE: Always use a fully charged battery to obtain an engine speed of 250 rpm or more. Inspect all cylinders in the same way. Measure the compression pressure as quickly as possible. (3) If the cylinder compression pressure is low, pour a small amount of engine oil into the cylinder through the spark plug hole and inspect it again. HINT: 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 cylinder head gasket.

(m) Using an 8 mm socket wrench, install the throttle body with motor assembly to the intake manifold with the 3 bolts.

Torque:

10 N·m {102 kgf·cm, 7 ft·lbf}

(n) Install the air cleaner cap with air cleaner hose.

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(o) Connect the fuel injector connector (for Direct Injection).

(p) Install the No. 1 engine under cover assembly.

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(q) Engage the clamp and install the engine wire with the 2 bolts.

Torque:

10 N·m {102 kgf·cm, 7 ft·lbf}

(r) Install the inlet No. 1 air cleaner.

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(s) Install the No. 1 radiator to support seal.

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(t) Connect the fuel injector connector (for Port Injection).

(u) Install the 4 spark plugs.

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(v) Clear the DTCs.

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NOTICE:

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

12. INSPECT CO/HC

HINT:

This check determines whether or not the idle CO/HC complies with regulations.

(a) Start the engine.

(b) Run the engine at 2500 rpm for approximately 180 seconds.

(c) Insert a CO/HC meter testing probe at least 40 cm (1.31 ft.) into the tailpipe during idle.

(d) Immediately check the CO/HC concentration during idle and when the engine is running at 2500 rpm.

HINT:

When performing a 2 mode (with the engine idling/running at 2500 rpm) test, the measurement procedures are determined by applicable local regulations.

If the CO/HC concentration does not comply with the regulations, perform troubleshooting in the order given below.

(1) Check for DTCs.

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(2) See the following table for possible causes, then inspect the applicable parts and repair them if necessary.

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