Onvehicle Inspection

NOTICE:

"Cold" and "Hot" in following sentences express the temperature of the coils themselves. "Cold" is from -10°C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F). 1. INSPECT SPARK TEST Check that the spark occurs.

(1)

Disconnect the high-tension cord from the spark

plug.

(2)

Remove the spark plugs.

(3)

Install the spark plugs to the high-tension cord.

(4)

Ground the spark plug.

(5)

See if spark occurs while engine is being cranked.

NOTICE:

To prevent gasoline from being injected from injectors during this test, crank the engine for no more than 5 - 10 seconds at time. If the spark done not occur, do the test as follows:

SPARK TEST

I NO

CHECK CONNECTION OF IGNITION COIL IGNITER

Connect securely.

CHECK CONNECTION OF IGNITION COIL IGNITER

Connect securely.

CHECK RESISTANCE OF HIGH-TENSION CORD (See step 2)

Maximum resistance: 25 kQ per cord

Replace the cord(s).

BAD

„ OK

CHECK POWER SUPPLY TO IGNITION COIL AND IGNITER

1. Turn ignition switch to ON.

2. Check that there is battery voltage at ignition coil positive (+) terminal.

Check wiring between ignition switch to ignition coil and igniter.

BAD

j OK

CHECK RESISTANCE OF IGNITION COIL

(See step 4)

Resistance:

Cold

Hot

Replace the ignition coil.

Primary

0.67 - 1.05 kQ

0.85 - 1.23 kQ

BAD

Secondary

9.3 - 16.0 kQ

11.7 - 18.8 kQ

OK

CHECK RESISTANCE OF CAMSHAFT POSITION SENSOR (See step 5)

Cold Hot Resistance: 985 - 1,600 Q 1,265 - 1,890 Q

Replace the camshaft position sensor.

BAD

2. INSPECT HIGH-TENSION CORDS

I ;L_^(cqrrect

(a) Disconnect the high-tension cords from the spark plugs.

(1) Disconnect the high-tension cords at the rubber

(WRONG

boot. Do not pull on the cords.

NOTICE:

Pulling on or bending the cords may damage the conductor

inside.

(2) Disconnect the high-tension cords from the clamp.

P20908

(b) Disconnect the high-tension cords from the ignition coils.

(1) Using a screwdriver, lift up the lock claw and disconnect the holder from the ignition coils.

(2) Disconnect the high-tension cord at the grommet.

Pulling on or bending the cords may damage the conductor inside. Do not wipe any of the oil from the grommet after the high-tension cord is disconnected.

(c) Reconnect the high-tension cords to the ignition coils. Maximum resistance: 25 k<> per cord

If the resistance is greater than maximum, check the terminals. If necessary, replace the high-tension cord.

(d) Reinstall the high-tension cords.

(1) Assemble the holder and grommet.

(2) Align the spline of the ignition coil with the spline of the holder, and push in the cord.

NOTICE:

Check that the holder is correctly installed to the grommet and distributor cap as shown in the illustration.

(3) Check that the lock claw of the holder is engaged by lightly pulling the holder.

(4) Connect the high-tension cords to the clamp. (e) Reconnect high-tension cords to spark plugs.

3. INSPECT SPARK PLUGS

(a) Disconnect high-tension cords from spark plugs.

(b) Using a 16 mm plug wrench, remove the spark plug.

(c) Using a spark plug cleaner or wire brush, clean the spark plug.

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

Below 588 kPa (6 kgf/cm2, 85 psi) Duration: 20 seconds or less

HINT:

If there are traces of oil, remove it with gasoline before using the spark plug cleaner.

(d) Visually checkthe spark plug for thread damage and insulator damage. If abnormal, replace the spark plug. Recommended spark plug:

DENSO

K16TR11

NGK

BKR5EKB11

(e) Inspect the electrode gap.

Correct electrode gap: 1.1 mm (0.043 in.)

(f) Using a 16 mm plug wrench, remove the spark plug. Torque: 18 Nm (180 kgfcm, 13 ftlbf)

(g) Reconnect the high-tension cords from the ignition coils.

Coil Plug For Sw20

4. INSPCT IGNITION COILS WITH IGNITER

(a) Disconnect the high-tension cords from the ignition coil.

(b) Disconnect ignition coils connector.

(c) Inspect the primary coil resistance.

Using an ohmmeter, measure the resistance between the positive (+) and negative (-) terminals. Primary coil resistance :

Cold

0.67 - 1.05 a

Hot

0.85 - 1.23 Q

If the resistance is not as specified, replace the ignition coil. (d) Remove ignition coils.

(e) Inspect the secondary coil resistance.

Using an ohmmeter, measure the resistance between the positive (+) and high-tension terminal. Secondary coil resistance :

Cold

9.3 - 16.0 kQ

Hot

11.7 - 18.8 kQ

If the resistance is not as specified, replace the ignition coil.

(f) Reinstall ignition coils

(g) Reconnect ignition coil connectors.

(h) Reconnect high-tension cords from ignition coils.

5. INSPECT CAMSHAFT POSITION SENSOR

(a) Disconnect camshaft position sensor connector.

(b) Inspect camshaft position sensor resistance.

Using an ohmmeter, measure the resistance between terminals.

Resistance:

Cold

985 - 1,600 Q

Hot

1,265 - 1,890 Q

If the resistance is not as specified, replace the camshaft position sensor.

(c) Reconnect camshaft position sensor connector.

Bad Toyota Tercel Ignition Coil

6. INSPECT CRANKSHAFT POSITION SENSOR

(a) Disconnect crankshaft position sensor connector.

(b) Inspect crankshaft position sensor resistance.

Using an ohmmeter, measure the resistance between terminals. Resistance:

Cold

985 - 1,600 a

Hot

1,265 - 1,890 a

If the resistance is not as specified, replace the crankshaft position sensor.

(c) Connect crankshaft position sensor connector.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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