Toyota Cressida and Van 1983-1990

Ignition Coil

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REMOVAL & INSTALLATION



Integrated Ignition Assembly (IIA)
1984-85 VAN


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Fig. Fig. 1 Exploded view of the IIA distributor assembly with coil-1984-85 Van

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the nuts and disconnect the wires from the terminals on the coil.
  4.  
  5. Remove the retaining screws and remove the coil.
  6.  

To install:

  1. Install the coil.
  2.  
  3. Connect the wiring to the coil and be careful of the routing of the wires.
  4.  
  5. Reconnect the battery.
  6.  

Integrated Ignition Assembly With Electronic Spark Advance (IIA/ESA)
1986-89 VAN


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Fig. Fig. 2 IIA/ESA wiring schematic-1986-89 Van

This system houses all of its components inside the distributor, including the ignition coil. The ECU is programmed with data for the optimum ignition timing under any and all operating conditions. Using data provided by sensors which monitor various engine functions (rpm, intake air volume, engine temperature, etc.), the microcomputer (ECU) triggers the spark at precisely the right instant. The electronic spark advance system is also used on Cressida, but without IIA.

  1. Disconnect the negative battery cable. Remove the right seat.
  2.  
  3. Remove the engine service hole cover.
  4.  
  5. Remove the number one spark plug. Place a finger over the spark plug hole and rotate the crankshaft clockwise to Top Dead Center (TDC). When there is pressure felt on the finger at the spark plug hole, this will be TDC of the compression stroke on number one cylinder. If not, repeat the procedure. Make sure the timing marks are set at 0. Install the number one spark plug.
  6.  
  7. Disconnect and tag (if necessary) all ignition wires from the distributor. Do not remove the high tension wire from the distributor cap.
  8.  
  9. Make an alignment mark on the base of the distributor and the engine block. Remove the distributor hold-down bolt and remove the distributor.
  10.  
  11. Remove the distributor cap, gasket and rotor. Remove the igniter dust cover and remove the ignition coil dust cover.
  12.  
  13. Remove the nuts and disconnect the wires from the terminals of the ignition coil. Remove the four ignition coil retaining screws and remove the ignition coil.
  14.  

To install:

  1. Install the ignition coil and the ignition coil retaining screws.
  2.  
  3. Install the ignition coil wire connections and their retaining nuts.
  4.  
  5. Install the igniter dust cover and install the ignition coil dust cover.
  6.  
  7. Align the slot on the top end of the drive rotor.
  8.  
  9. Align the drilled mark on the driven gear with the groove on the distributor housing. Insert the distributor, aligning the stationary flange center with the bolt hole in the head. If needed, use the alignment mark made earlier to ease in the installation. Tighten the bolts.
  10.  
  11. Install the IIA distributor and the hold-down bolt.
  12.  
  13. Reconnect all the ignition wires and vacuum hoses to the IIA distributor. Reconnect the negative battery cable. Connect a timing light and tachometer.
  14.  
  15. Start the engine and set the ignition timing. If the engine is hard to start, have someone turn the distributor left and right very slowly until the engine starts. Once this has happened, use your timing light to readjust the timing properly. Recheck the idle speed adjustment.
  16.  
  17. Install the engine service hole cover and install the right seat.
  18.  

Electronic Spark Advance (ESA) Without IIA
CRESSIDA
  1. Disconnect the negative battery cable. Remove the right seat.
  2.  
  3. Remove the engine service hole cover.
  4.  
  5. Remove the number one spark plug. Place a finger over the spark plug hole and rotate the crankshaft clockwise to Top Dead Center (TDC). When there is pressure felt on the finger at the spark plug hole, this will be TDC of the compression stroke on number one cylinder. If not, repeat the procedure. Make sure the timing marks are set at 0. Install the number one spark plug.
  6.  
  7. Disconnect and tag (if necessary) all ignition wires from the distributor. Do not remove the high tension wire from the distributor cap.
  8.  
  9. Make an alignment mark on the base of the distributor and the engine block. Remove the distributor hold-down bolt and remove the distributor.
  10.  
  11. Remove the distributor cap, gasket and rotor. Remove the igniter dust cover and remove the ignition coil dust cover.
  12.  
  13. Remove the nuts and disconnect the wires from the terminals of the ignition coil. Remove the four ignition coil retaining screws and remove the ignition coil.
  14.  

To install:

  1. Install the ignition coil and the ignition coil retaining screws.
  2.  
  3. Install the ignition coil wire connections and their retaining nuts.
  4.  
  5. Install the igniter dust cover and install the ignition coil dust cover.
  6.  
  7. Align the slot on the top end of the drive motor.
  8.  
  9. Align the drilled mark on the driven gear with the groove on the distributor housing. Insert the distributor, aligning the stationary flange center with the bolt hole in the head. If needed, use the alignment mark made earlier to ease in the installation. Tighten the bolts.
  10.  
  11. Install the distributor and the hold-down bolt.
  12.  
  13. Reconnect all the ignition wires and vacuum hoses to the distributor. Reconnect the negative battery cable. Connect a timing light and tachometer.
  14.  
  15. Start the engine and set the ignition timing. If the engine is hard to start, have someone turn the distributor left and right very slowly until the engine starts. Once this has happened, use your timing light to readjust the timing properly. Recheck the idle speed adjustment.
  16.  
  17. Install the engine service hole cover and install the right seat.
  18.  

TESTING



On models equipped with the Electronic Spark Advance (ESA) system, refer to the testing and inspection procedures outlined later in this section.

Primary Coil Resistance
INTEGRATED IGNITION ASSEMBLY (IIA)-1984-85 VAN


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Fig. Fig. 3 Connect an ohmmeter across the coils positive and negative terminals to measure primary resistance-IIA distributor

  1. Using a suitable ohmmeter, measure the resistance between the positive and negative terminals. The primary coil resistance (when cold) should be 0.3-0.5 ohms.
  2.  
  3. If the resistance is not within specifications, replace the ignition coil.
  4.  

INTEGRATED IGNITION ASSEMBLY WITH ELECTRONIC SPARK ADVANCE (IIA/ESA)-1986-89 VAN


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Fig. Fig. 4 Primary coil resistance between the positive and negative terminals should be 1.2-1.5 ohms when cold-IIA/ESA distributor

  1. Using a suitable ohmmeter, measure the resistance between the positive and negative terminals. The primary coil resistance (when cold) should be 1.2-1.5 ohms.
  2.  
  3. If the resistance is not within specifications, replace the ignition coil.
  4.  

Secondary Coil Resistance
INTEGRATED IGNITION ASSEMBLY (IIA)-1984-85 VAN


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Fig. Fig. 5 Connect an ohmmeter across the coils positive and high tension terminals to measure secondary resistance-IIA distributor

  1. Using a suitable ohmmeter, measure the resistance between the positive terminal and the high tension terminal. The secondary coil resistance (when cold) should be 7.5-10.5 kilo ohms.
  2.  
  3. If the resistance is not within specifications, replace the ignition coil.
  4.  

INTEGRATED IGNITION ASSEMBLY WITH ELECTRONIC SPARK ADVANCE (IIA/ESA)-1986-89 VAN


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Fig. Fig. 6 Connect an ohmmeter across the coils positive and high tension terminals to measure secondary resistance-IIA/ESA distributor

  1. Using a suitable ohmmeter, measure the resistance between the positive terminal and the high tension terminal. The secondary coil resistance (when cold) should be 7.5-10.5 kilo ohms.
  2.  
  3. If the resistance is not within specifications, replace the ignition coil.
  4.  

Signal Generator (Pick-Up Coil) Resistance
INTEGRATED IGNITION ASSEMBLY (IIA)-1984-85 VAN
  1. Using a suitable ohmmeter, check the resistance of the signal generator.
  2.  
  3. The signal generator resistance should be 140-180 ohms.
  4.  
  5. If the resistance is not correct, replace the signal generator with the distributor housing assembly.
  6.  

INTEGRATED IGNITION ASSEMBLY WITH ELECTRONIC SPARK ADVANCE (IIA/ESA)-1986-89 VAN


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Fig. Fig. 7 Inspecting the pickup coil-1986-89 Van

  1. Using a suitable ohmmeter, check the resistance of the pickup coil.
  2.  
  3. The pickup coil resistance should be 140-180 ohms.
  4.  
  5. If the resistance is not correct, replace the pickup coil with the distributor housing assembly.
  6.  

ELECTRONIC SPARK ADVANCE (ESA)-1989-90 CRESSIDA


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Fig. Fig. 8 Inspecting the pickup coil-1989-90 Cressida

  1. Using a suitable ohmmeter, check the resistance of the pickup coil at the pickup coil connector.
  2.  
  3. The resistance should be 140-180 ohms at all terminals of the connector except between terminals NE and G; between these 2 terminals the resistance should be 180-220 ohms.
  4.  

Ignition Coil With Igniter Resistance

ELECTRONIC SPARK ADVANCE (ESA)-1983-88 CRESSIDA



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Fig. Fig. 9 ESA wiring schematic-1983-88 Cressida



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Fig. Fig. 10 Inspecting the secondary coil resistance-1983-88 Cressida

  1. Disconnect the high tension wire.
  2.  
  3. Using a suitable ohmmeter, measure the resistance between the positive (brown side) and negative (black side) terminals.
  4.  
  5. The primary resistance with the coil cold should be 0.4-0.5 ohms.
  6.  
  7. Using the same ohmmeter, measure the resistance between the positive (brown side) and the high tension terminals.
  8.  
  9. The secondary coil resistance with the coil cold should be 8.5-11.5 kilo ohms.
  10.  
  11. If the coil resistance is to specifications, reconnect the high tension wire.
  12.  
  13. If the coil resistance is not to specifications, replace the coil.
  14.  

ELECTRONIC SPARK ADVANCE (ESA)-1989-90 CRESSIDA


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Fig. Fig. 11 ESA wiring schematic-1989-90 Cressida

  1. Disconnect the high tension wire.
  2.  
  3. Using the suitable ohmmeter, measure the resistance between the positive and negative terminals.
  4.  
  5. The primary resistance with the coil cold should be 0.24-0.30 ohms.
  6.  
  7. Using the same ohmmeter, measure the resistance between the positive and the high tension terminals.
  8.  
  9. The secondary coil resistance with the coil cold should be 9.2-12.5 kilo ohms.
  10.  
  11. If the coil resistance is to specifications, reconnect the high tension wire.
  12.  
  13. If the coil resistance is not to specifications, replace the coil.
  14.  

Igniter
INTEGRATED IGNITION ASSEMBLY (IIA)-1984-85 VAN


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Fig. Fig. 12 Connect the (+) probe to the coils (+) terminal and the (-) probe to ground to inspect power source line voltage



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Fig. Fig. 13 Connect the (+) probe to the coils (-) terminal and the (-) probe to ground to inspect power transistor voltage



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Fig. Fig. 14 Connect the batterys positive terminal to the power transistors pink post and the batterys negative terminal to the transistors white post-IIA distributor



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Fig. Fig. 15 If the igniter reading is not 0-3 volts, replace the igniter-IIA distributor



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Fig. Fig. 16 With a feeler gauge, inspect the air gap between the signal rotor and the pickup coils projection

  1. Turn the ignition switch to the ON position. Using a suitable voltmeter, connect the positive probe to the ignition coil positive terminal and the negative probe to a suitable body ground. The voltage should be approximately 12 volts.
  2.  
  3. Inspect the power transistor in the igniter by using the following procedure:
  4.  
    1. Connect the voltmeter positive probe to the ignition coil negative terminal and the negative probe to the body ground. The voltmeter should read approximately 12 volts.
    2.  
    3. Using a dry cell (1.5V) battery, connect the positive terminal of the battery to the pink wire terminal and the negative terminal to the white wire terminal.
    4.  



CAUTION
Do not apply battery voltage for more than five seconds to avoid destroying the power transistor in the igniter.

    1. Using a voltmeter, connect the positive probe to the ignition coil negative terminal and the negative probe to a suitable body ground. Check the voltage reading; it should read 0 to 3 volts. If there is a problem with the igniter, replace it with a new one.
    2.  


  1. Turn off the ignition switch and remove the test equipment.
  2.  

ELECTRONIC SPARK ADVANCE (ESA)-1983-88 CRESSIDA


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Fig. Fig. 17 Using a voltmeter to test the power source line voltage of the igniter-ESA 1983-88 Cressida



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Fig. Fig. 18 Apply 2-5 volts, then connect the positive (+) terminal of the battery to the pink wire and the batterys negative (-) terminal to ground-ESA



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Fig. Fig. 19 When testing the igniter, make sure you unplug the correct colored wires

  1. Turn the ignition switch to the ON position. Disconnect the brown and yellow wiring connector on the igniter.
  2.  
  3. Using a suitable voltmeter, connect the positive probe to the brown connector on the wire harness side and the negative probe to the body ground.
  4.  
  5. The voltage should be approximately 12 volts.
  6.  
  7. Check the power transistor in the igniter as follows:
  8.  
    1. Disconnect the brown wiring connector.
    2.  
    3. Disconnect the coil cord from the distributor.
    4.  
    5. Disconnect the pink and white wiring connector.
    6.  
    7. Using a 3 volt dry cell battery (there should be approximately 2-5 volts applied), connect the positive terminal of the battery to the pink wire terminal and the negative terminal to the body ground. Applying more than five volts would destroy the diodes.
    8.  
    9. Check that there is a spark from the coil cord tip, for at least one second. If there is no spark, replace the igniter. If there is a spark, the igniter is operating properly.
    10.  

  9. Turn the ignition switch OFF, remove all test equipment and reconnect the wiring.
  10.  

Distributor Inspection
INTEGRATED IGNITION ASSEMBLY (IIA)-1984-85 VAN
  1. Inspect the air gap, by using a feeler gauge. Measure the gap between the signal rotor and the pick-up coil projection. The air gap should be 0.008-0.016 in. (0.20-0.40mm).
  2.  
  3. Inspect the pick-up coil by using an ohmmeter to check the resistance of the pick-up coil. The pick-up coil resistance should be 140-180 ohms. If the resistance is not correct, replace the pick-up coil with the distributor housing assembly.
  4.  
  5. Inspect the vacuum advance (if so equipped) by disconnecting the vacuum hose and connecting a vacuum pump to the diaphragms. Apply a vacuum and check that the vacuum advance moves freely. If the advance unit does not respond to the vacuum, replace it.
  6.  
  7. Inspect the governor advance by turning the rotor shaft counterclockwise, release it and check that the rotor returns slightly clockwise. Check that the rotor shaft is not excessively loose.
  8.  

INTEGRATED IGNITION ASSEMBLY WITH ELECTRONIC SPARK ADVANCE (IIA/ESA)-1986-89 VAN


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Fig. Fig. 20 Measure the air gap between the signal rotor and pickup coils projection-1986-89 Van

  1. Remove the distributor cap, rotor, and dust shield.
  2.  
  3. Turn the engine over (you may use a socket wrench on the front pulley bolt to do this) until the projection on the pickup coil is directly opposite the signal rotor tooth.
  4.  
  5. Get a non-ferrous (paper, brass, or plastic) set of feeler gauges and measure the gap between the signal rotor and the pick-up coil projection. DO NOT USE AN ORDINARY METAL FEELER GAUGE! The gauge should just touch either side of the gap; the permissible range is 0.008 in. (0.2mm).
  6.  
  7. If the gap is either too wide or too narrow, replace the pick-up coil, governor shaft and housing assembly.
  8.  
  9. If the gap is within specifications, place the dust shield, rotor and distributor cap back in their proper installed position.
  10.  

ELECTRONIC SPARK ADVANCE (ESA) IGNITION SYSTEM-1983-88 CRESSIDA


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Fig. Fig. 21 Pickup coil terminal identification-1983-88 Cressida



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Fig. Fig. 22 Check the air gap between the signal rotor and pickup coils projection-1983-88 Cressida

  1. Check for cracks, carbon tracks, burnt or corroded terminals.
  2.  
  3. Check the distributor center contact for wear. If a problem is found with any component, replace the component.
  4.  
  5. Using a suitable ohmmeter, check the two pickup coils as follows:
  6.  
    1. Measure the resistance between the top center terminal (white wire) and the lower right terminal (yellow wire). The resistance should be 140-180 ohms.
    2.  
    3. Measure the resistance between the top center terminal (white wire) and the lower left terminal (red wire). The resistance should be 140-180 ohms.
    4.  

  7. If the resistance is not correct, replace the distributor assembly.
  8.  
  9. Using a suitable feeler gauge, measure the air gap between the signal rotor and the signal generators' (pick-up coils') projection. The air gap should be 0.008-0.016 in. (0.2-0.4mm). If not within specifications, replace the distributor assembly.
  10.  

ELECTRONIC SPARK ADVANCE (ESA) IGNITION SYSTEM-1989-90 CRESSIDA


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Fig. Fig. 23 Checking the air gap-1989-90 Cressida

  1. Remove the distributor cap, rotor, and dust shield.
  2.  
  3. Turn the engine over (you may use a socket wrench on the front pulley bolt to do this) until the projection on the pickup coil is directly opposite the signal rotor tooth.
  4.  
  5. Get a non-ferrous (paper, brass, or plastic) set of feeler gauges and measure the gap between the signal rotor and the pick-up coil projection. DO NOT USE AN ORDINARY METAL FEELER GAUGE! The gauge should just touch either side of the gap. The permissible range is 0.008-0.016 in. (0.2-0.4mm).
  6.  
  7. If the gap is either too wide or too narrow, the distributor assembly (unfortunately) must be replaced.
  8.  
  9. If the gap is within specifications, place the dust shield, rotor and distributor cap back in their proper installed positions.
  10.  

 
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