Electronic Spark Advance

The ECU is programmed with data for optimum ignition timing under any and all operating conditions. Using data provided by sensors which monitor various engine functions (rpm, intake air volume, eng. temperature, etc.) the microcomputer (ECU) triggers the spark at precisely the right instant.

ESA SYSTEM CIRCUIT

Celica 1989 Coil Assy Ignition

Igniter Assy

¡Tachometer /Service / / \ Connector

Distributor

Spark Plugs

Ignition Coil w/lgniter

ON-VEHICLE INSPECTION

SPARK TEST

CHECK THAT SPARK OCCURS

(8) Disconnect high-tension cord from the distributor. }

(b) Hold the end approx. 12.7 mm (0.50 in.) from bodyj of car.

(c) See if spark occurs while engine is being cranked

NOTE: To prevent gasoline from being Injected from injectors during this test, crank the engine for no more than 1-2 seconds at a time.

If the spark does not occur, perform the test as follows.

Set Spark Plug Gap Kia Rio 2013Toyota Corolla Spark Advancer

INSPECTION OF HIGH-TENSION CORD

1. CAREFULLY REMOVE HIGH TENSION CORDS BY RUBBER THEIR BOOTS

CAUTION: DO NOT pull on the cords or bend the wires. The conductor Inside may be damaged.

High Tension Cord Testing

2. INSPECT CORD TERMINALS

Check the terminals for corrosion, breaks or distortion. Replace wire as required.

3. CHECK WIRE RESISTANCE

Using an ohmmeter, check that the resistance does not exceed the maximum. Replace the cord as required.

Maximum resistance: 25 kO per cord

INSPECTION OF SPARK PLUG (Platinum Tipped Spark Plug)

CAUTION:

• NEVER USE WIRE BRUSH FOR CLEANING

• NEVER ATTEMPT TO ADJUST GAP ON USED PLUG

• SPARK PLUGS SHOULD BE REPLACED EVERY 60,000 miles (100,000 km)

1. INSPECT ELECTRODE

(a) If using a megger (insulation resistance meter): Measure the insulation resistance.

Correct Insulation resistance: More than 10 MO

If less than 10 MO, clean the plug. (See page IG-6)

Quickly race the engine to 4,000 rpm five times. Visually inspect the spark plugs.

If the electrode is dry Okay

If the electrode is wet Clean the plug

2. REMOVE SPARK PLUGS

IGOm

2003 Rv4 Spark Plug

VISUALLY INSPECT SPARK PLUGS

Inspect the spark plugs for thread or insulator

If defective, replace the plug.

Spark plug: ND P16R

NGK BPR5EP11

INSPECT ELECTRODE GAP

If limit is exceeded, replace the plug.

Correct electrode gap of new plug: 1.1 mm (0.043 in.)

If adjusting the gap of a new plug, bend only the base the ground electrode, do not touch the tip.

CLEAN SPARK PLUGS

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

Air pressure: Bellow 6 kg/cm2 (85 psi, 588 kPa) Duration: 20 seconds or less

NOTE: If there are traces of oil, clean it off with gasoline before using the spark plug cleaner.

INSTALL SPARK PLUGS

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Electronics Distributors Toyota Tercel

Distributor Cap

Timer Uhr Ausmalbilder

INSPECTION OF IGNITION COIL

1. DISCONNECT HIGH-TENSION CORD

2. MEASURE COIL RESISTANCE

(a) Disconnect ignition coil connectors.

(b) Measure primary coil resistance.

Using an ohmmeter, measure the resistance between the positive < -f ) {brown side) and negative ( —) {black side) terminals.

(c) Measure secondary coil resistance.

Using an ohmmeter, measure the resistance between the positive < + ) terminal (brown side) and the high tension terminal.

Secondary coil resistance (cold): 8.5 — 11.5 kft

3. CONNECT HIGH-TENSION CORD

ON-VEHICLE INSPECTION OF DISTRIBUTOR

1. INSPECT DISTRIBUTOR CAP AND ROTOR

(a) Check for cracks, carbon tracks, burnt or corroded terminals.

(b) Check the distributor center contact for wear. If a problem is found, replace the component.

2. CHECK PICKUP COIL

Using an ohmmeter, check each resistance of the two pickup coils.

G pickup coil resistance:

If the resistance is not correct, replace the distributor.

DISTRIBUTOR

REMOVAL OF DISTRIBUTOR

1. DISCONNECT HIGH TENSION CORDS FROM CYLINDER HEAD AND IGNITION COIL

2. DISCONNECT DISTRIBUTOR CONNECTOR

3. REMOVE DISTRIBUTOR SET BOLT

4. PULL OUT DISTRIBUTOR FROM CYLINDER HEAD

5. REMOVE O-RING

Corolla Distributor Point Gap Seal

REPLACEMENT DISTRIBUTOR DRIVE GEAR

1. GRIND DRIVE GEAR AND PIN

Using a grinding wheel, grind the gear and pin. CAUTION: Be careful not to damage the shaft.

2. REMOVE PIN AND DRIVE GEAR

(a) Using a punch and hammer, drive out the pin.

(b) Remove the drive gear and discard it.

3. INSTALL NEW DRIVE GEAR AND PIN

(a) Align the marks on the housing and new gear.

(b) Using a hammer, install a new pin.

Fj40 Distributor Timing

INSTALLATION OF DISTRIBUTOR

1. INSTALL DISTRIBUTOR AND SET TIMING

(a) Turn the crankshaft pulley until the timing mark is aligned with the TDC mark.

1999 4runner Fuel Pump Diagram

(b) Remove the oil filler cap.

(c) Make sure that the match hole on the No. 2 journal of the camshaft housing is aligned with that of the camshaft.

NOTE: If not, turn the crankshaft one full turn.

(d) Install the new O-ring to the distributor.

NOTE: Always use a new O-ring when installing the distributor.

Tacoma Distributor Tdc

(e) Align the matchmark of the distributor (the drillmark on spiral gear) with that of distributor housing.

(f) Insert the distributor, aligning the center of flange with that of the bolt hole of cylinder head.

(g) Align the rotor tooth with the pickup coil.

(h) Temporarily install the distributor set bolt.

(i) Install the distributor cap with wires, (j) Connect the distributor connector, (k) Install the oil filler cap.

Connect The DistributorCelica Timing Light

2. ADJUST IGNITION TIMING

(a) Connect a timing light to the engine.

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

(c) Short circuit the terminals of the check connector. T and Ei

(d) Using a timing light, slowly turn the distributor unt) the timing mark on the crankshaft pulley is aligned with the 10° mark. Tighten the distributor bolt.

(e) Unshort the check connector.

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