Toyota Celica 1986-1993 Repair Guide

Diagnosis and Testing

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The electronic ignition system is relatively maintenance free. Basic maintenance consists of inspection of the distributor cap, rotor and the ignition wires and making replacements as necessary.

If there is no spark, perform the appropriate On-Vehicle Spark Test. The following tests are also performed if ignition problems are encountered.



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Fig. Fig. 1 Spark Test Diagnostic Chart



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Fig. Fig. 2 Spark Test Diagnostic Chart



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Fig. Fig. 3 Spark Test Diagnostic Chart



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Fig. Fig. 4 Spark Test Diagnostic Chart



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Fig. Fig. 5 Spark Test Diagnostic Chart

IGNITION COIL



2S-E Engine
  1. Remove the IIA distributor cap, rotor and dust covers. Disconnect the IIA connectors.
  2.  
  3. Inspect the primary coil resistance. Using an ohmmeter, measure the resistance between the positive and negative terminals. The primary coil resistance (cold) should be 0.3-0.5 ohms.
  4.  
  5. Inspect the secondary coil resistance. Using an ohmmeter, measure the resistance between the positive terminal and the high-tension terminal. The secondary coil resistance (cold) should be 7,700-10,400 ohms.
  6.  
  7. If the resistances are not as specified, replace the ignition coil.
  8.  

3S-GE Engine
  1. Disconnect the high-tension coil wire.
  2.  
  3. Inspect the primary coil resistance. Using an ohmmeter, measure the resistance between the positive and negative terminals. The primary coil resistance (cold) should be 0.4-0.5 ohms.
  4.  
  5. Inspect the secondary coil resistance. Using an ohmmeter, measure the resistance between the positive terminal and the high-tension terminal. The secondary coil resistance (cold) should be 10,200-13,800 ohms.
  6.  
  7. If the resistances are not as specified, replace the ignition coil.
  8.  

3S-GTE Engine
  1. Remove the intercooler if it is necessary for working clearance (see ). Disconnect the high-tension coil wire.
  2.  
  3. Inspect the primary coil resistance. Using an ohmmeter, measure the resistance between the positive and negative terminals. The primary coil resistance (cold) should be 0.4-0.5 ohms on 1988-91 Celicas and 0.3-0.6 ohms on 1992-93 Celicas.
  4.  
  5. Inspect the secondary coil resistance. Using an ohmmeter, measure the resistance between the positive terminal and the high-tension terminal. The secondary coil resistance (cold) should be 10,200-13,800 ohms on 1988-91 Celicas and 9,000-15,000 ohms on 1992-93 Celicas.
  6.  
  7. If the resistances are not as specified, replace the ignition coil.
  8.  

3S-FE Engine
  1. Disconnect the coil wire and connectors. Remove the distributor cap and rotor.
  2.  
  3. Inspect the primary coil resistance. Using an ohmmeter, measure the resistance between the positive and negative terminals. The primary coil resistance (cold) should be 0.38-0.46 ohms.
  4.  
  5. Inspect the secondary coil resistance. Using an ohmmeter, measure the resistance between the positive terminal and the high-tension terminal. The secondary coil resistance (cold) should be 7,700-10,400 ohms.
  6.  
  7. If the resistances are not as specified, replace the ignition coil.
  8.  

4A-FE Engine
  1. Remove the IIA distributor cap, rotor and dust covers. Disconnect the IIA connectors.
  2.  
  3. Inspect the primary coil resistance. Using an ohmmeter, measure the resistance between the positive and negative terminals. The primary coil resistance (cold) should be 1.28-1.56 ohms on 1990-91 Celicas and 1.1-1.7 ohms on 1992-93 Celicas.
  4.  
  5. Inspect the secondary coil resistance. Using an ohmmeter, measure the resistance between the positive terminal and the high-tension terminal. The secondary coil resistance (cold) should be 10,400-14,000 ohms on 1990-91 Celicas and 9,000-15,000 ohms on 1992-93 Celicas.
  6.  
  7. If the resistances are not as specified, replace the ignition coil.
  8.  

5S-FE Engine


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Fig. Fig. 6 Checking primary coil resistance2S-E engine



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Fig. Fig. 7 Checking secondary coil resistance2S-E engine



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Fig. Fig. 8 Checking primary coil resistance3S-GE, 3S-GTE and 5S-FE engines

  1. Disconnect the high-tension coil wire.
  2.  
  3. Inspect the primary coil resistance. Using an ohmmeter, measure the resistance between the positive and negative terminals. The primary coil resistance (cold) should be 0.4-0.5 ohms on 1988-91 Celicas and 0.3-0.6 ohms on 1992-93 Celicas.
  4.  



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Fig. Fig. 9 Checking secondary coil resistance3S-GE, 3S-GTE and 5S-FE engines



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Fig. Fig. 1 0Checking primary coil resistance3S-FE engine

  1. Inspect the secondary coil resistance. Using an ohmmeter, measure the resistance between the positive terminal and the high-tension terminal. The secondary coil resistance (cold) should be 10,000-14,000 ohms on 1988-91 Celicas and 9,000-15,000 ohms on 1992-93 Celicas.
  2.  
  3. If the resistances are not as specified, replace the ignition coil.
  4.  



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Fig. Fig. 1 1Checking secondary coil resistance3S-FE engine



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Fig. Fig. 1 2Checking primary coil resistance4A-FE engine



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Fig. Fig. 1 3Checking secondary coil resistance4A-FE engine

SIGNAL GENERATOR (PICK-UP COIL)



Resistance
2S-E ENGINE
  1. Disconnect the pickup coil connector.
  2.  
  3. Using an ohmmeter, measure the resistance of the pickup coil. It should be 140-180 ohms.
  4.  
  5. If the resistance is not within specification, replace the distributor housing.
  6.  



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Fig. Fig. 1 4Measuring pickup coil resistance2S-E engine

3S-GE and 3S-GTE ENGINES
  1. On the 3S-GTE engine it may be necessary to remove the intercooler for working clearance. Disconnect the 4-wire pickup coil connector.
  2.  
  3. Using an ohmmeter, measure the resistance of the pickup coil.
    1. Measure the resistance between G1 and G(-). It should be 140-180 ohms for 1986-91 models and 125-190 ohms for 1992-93 models.
    2.  
    3. Measure the resistance between G2 and G(-). It should be 140-180 ohms for 1986-91 models and 125-190 ohms for 1992-93 models.
    4.  
    5. Measure the resistance between NE and G(-). It should be 140-180 ohms for 1986-89 models, 180-220 ohms for 1990-91 models and 155-240 ohms for 1992-93 models.
    6.  

  4.  
  5. If the resistance is not within specification, replace the distributor.
  6.  



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Fig. Fig. 1 5Signal generator (pickup coil) connector view1986-89 3S-GE and 3S-GTE engines



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Fig. Fig. 1 6Distributor connector5S-FE engine shown



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Fig. Fig. 1 7Signal generator (pickup coil) connector view3S-GTE engine

3S-FE ENGINE
  1. Disconnect the 3-wire pickup coil connector.
  2.  
  3. Using an ohmmeter, measure the resistance of the pickup coil.
    1. Measure the resistance between G and G(-). It should be 140-180 ohms.
    2.  
    3. Measure the resistance between NE and G(-). It should be 140-180 ohms.
    4.  

  4.  
  5. If the resistance is not within specification, replace the distributor housing.
  6.  



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Fig. Fig. 1 8Signal generator (pickup coil) connector view3S-FE engine

4A-FE ENGINE
  1. Disconnect the pickup coil connector.
  2.  
  3. Using an ohmmeter, measure the resistance of the pickup coil.
    1. Measure the resistance between G1 and G(-). It should be 140-180 ohms on 1990-91 models and 185-265 ohms on 1992-93 models.
    2.  
    3. Measure the resistance between NE and G(-). It should be 140-180 ohms on 1990-91 models and 185-265 ohms on 1992-93 models.
    4.  

  4.  
  5. If the resistance is not within specification, replace the distributor housing.
  6.  



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Fig. Fig. 1 9Signal generator (pickup coil) connector view4A-FE engine

5S-FE ENGINE
  1. Disconnect the 3-wire pickup coil connector.
  2.  
  3. On 1990-91 models, measure the resistance of the pickup coil using an ohmmeter.
    1. Measure the resistance between G1 and G(-). It should be 170-210 ohms.
    2.  
    3. Measure the resistance between NE and G(-). It should be 170-210 ohms.
    4.  

  4.  
  5. On 1992-93 models, measure the resistance of the pickup coil using an ohmmeter.
    1. Measure the resistance between G(+) and G(-). It should be 185-265 ohms.
    2.  
    3. Measure the resistance between NE(+) and NE(-). It should be 370-530 ohms.
    4.  

  6.  
  7. If the resistance is not within specification, replace the distributor.
  8.  



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Fig. Fig. 2 0Signal generator (pickup coil) connector view1990 5S-FE engine



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Fig. Fig. 2 1Signal generator (pickup coil) connector view1991 5S-FE engine



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Fig. Fig. 2 2Signal generator (pickup coil) connector view1992-93 5S-FE engine

Air Gap

WARNING
The air gap between the signal rotor and the pickup coil projection can only be checked; it cannot be adjusted. If the distributor air gap is incorrect, the distributor must be replaced.

  1. On the 3S-GTE engine it may be necessary to remove the intercooler for working clearance.
  2.  
  3. Remove the distributor cap from the distributor housing without disconnecting the ignition wires.
  4.  
  5. Pull the ignition rotor (not the signal rotor) straight up and remove it. If the ignition rotor contacts are worn, pitted or burned, replace the ignition rotor. Do NOT file the contacts.
  6.  



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Fig. Fig. 2 3Removing the distributor cap



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Fig. Fig. 2 4Locating the ignition rotor



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Fig. Fig. 2 5Removing the ignition rotor

  1. Remove the dust shield.
  2.  



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Fig. Fig. 2 6Checking the distributor air gaps2S-E engine



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Fig. Fig. 2 7Checking the distributor air gaps1986-89 3S-GE and 3S-GTE engines



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Fig. Fig. 2 8Checking the distributor air gaps1990-93 3S-GTE engine

  1. Turn the crankshaft (a socket wrench on the front pulley bolt may be used to do this) until a tooth on the signal rotor aligns with the projection on the pick-up coil.
  2.  
  3. Using a non-ferrous feeler gauge (brass, copper, or plastic) measure the gap between the signal rotor and the pick-up coil projection. The gauge should just touch either side of the gap (snug fit).
  4.  



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Fig. Fig. 2 9Checking the distributor air gaps3S-FE engine



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Fig. Fig. 3 0Checking the distributor air gaps4A-FE engine



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Fig. Fig. 3 1Checking the distributor air gaps1990-91 5S-FE engine


WARNING
Do NOT use an ordinary iron or steel feeler gauge.

  1. The range for the air gap is 0.008-0.016 in. (0.20-0.40mm).
  2.  
  3. If the gap is not within the specified range, replace the distributor housing on the 4A-fe, 2S-E and 3S-fe engines or the distributor on the other engines.
  4.  
  5. Reinstall the removed components and check the ignition timing.
  6.  



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Fig. Fig. 3 2Checking the distributor air gaps1992-93 5S-FE engine

IGT SIGNAL FROM ECU



See .

IGNITER



The igniter is diagnosed in the sense that if everything else is functioning properly and the problem still exists, then the igniter is at fault. It is basically a process of elimination that leads to replacing the igniter.

 
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