Toyota Venza: On-vehicle Inspection

Toyota Venza Service Manual / 1ar-fe Engine Control / Ignition System / On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. PERFORM SPARK TEST

(a) Check for DTCs (See page ).

NOTICE:

If any DTC is output, perform troubleshooting procedures for that DTC.

(b) Remove the ignition coils and spark plugs (See page ).

(d) Install the spark plug into the ignition coil, and then connect the ignition coil connector.

(e) Ground the spark plug.

(f) Check that spark occurs at each spark plug while the engine is being cranked.

NOTICE:

Be sure to ground the spark plugs when checking them.
Do not crank the engine for more than 2 seconds.
Cranking will stop if the engine switch is pushed again for models with cranking holding function.
If a spark plug has been struck or dropped, replace it.
If an ignition coil assembly has been struck or dropped, replace it.

HINT:

If spark does not occur for any cylinder, perform the following Inspect Ignition Coil and Spark Test procedure.

(g) Connect the 4 fuel injector connectors.

(h) Install the spark plugs and ignition coils (See page ).

(i) Check for DTCs (See page ).

(j) Clear the DTCs (See page ).

2. INSPECT IGNITION COIL AND SPARK TEST

HINT:

Perform "Inspection After Repair" after replacing the spark plug and ignition coil assembly (See page ).

(a) Check that the wire harness side connector of the ignition coil with igniter is securely connected.

Result

Result	Action
NG	Connect securely
OK	Go to next step

(b) Perform a spark test on each ignition coil.

(1) Replace the ignition coil with a known good one.

(2) Perform the spark test again.

Result

Result	Action
NG	Go to next step
OK	Replace ignition coil

(1) Replace the spark plug with a known good one.

(2) Perform the spark test again.

Result

Result	Action
NG	Inspect the ignition system (See page ).
OK	Replace spark plug

3. CHECK SPARK PLUG

NOTICE:

Do not use a wire brush for cleaning.
Do not attempt to adjust the electrode gap of a used spark plug.

HINT:

Perform "Inspection After Repair" after replacing the spark plug (See page ).

(a) Check the electrode using a megohmmeter:

Text in Illustration

Ground

(1) Using a megohmmeter, measure the insulation resistance.

Standard Insulation Resistance:

Tester Connection	Condition	Specified Condition
Spark plug (terminal part) - Body ground	Always	10 MΩ or higher

HINT:

If the result is not as specified, clean the spark plug with a spark plug cleaner and measure the resistance again.
If a megohmmeter is not available, perform the following simple inspection instead.

(b) Alternative inspection method:

(1) Quickly accelerate the engine to 4000 rpm 5 times.

(2) Remove the spark plug (See page
).

(3) Visually check the spark plug.

If the electrode is dry, the spark plug is functioning properly. If the electrode is damp, proceed to the next step.

(4) Install the spark plug (See page ).

If there is any damage, replace the spark plug.

Recommended Spark Plug:

Manufacturer	Spark Plug Type
DENSO	SK16HR11

(d) Reference:

(1) Check the spark plug electrode gap.

Maximum electrode gap for a used spark plug:

1.3 mm (0.0512 in.)

If the gap is more than the maximum, replace the spark plug.

NOTICE:

Never attempt to adjust the gap of a used plug.

Electrode gap for a new spark plug:

1.0 to 1.1 mm (0.0394 to 0.0433 in.)

Text in Illustration

*1	Spark plug electrode gap

(e) Clean the spark plugs.

If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.

Standard air pressure:

588 kPa (6 kgf/cm2, 85 psi)

Standard duration:

20 seconds or less

HINT:

Only use a spark plug cleaner when the electrode is free of oil. If the electrode has traces of oil, use gasoline to clean off the oil before using the spark plug cleaner.

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