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    Acura Coupes and Sedans 1986-1993 Repair Guide

    Diagnosis and Testing

    Print

    DISTRIBUTOR



    Top End Inspection
    1. Check for rough or pitted rotor and cap terminals.
    2.  
    3. Scrape or file off carbon deposits. Smooth rotor terminal with an oil stone or No. 600 sandpaper, if rough.
    4.  
    5. Check distributor cap for cracks, wear and damages. If necessary, clean or replace it.
    6.  

    IGNITER



    Input Test

    The PGM-FI ECU and tachometer should be normal. When the self diagnostic indicator blinks, perform self diagnostic checks on the fuel system. Perform an input test for the igniter unit after completing test on the ignition and fuel systems.

    INTEGRA

    See Figure 1



    Click image to see an enlarged view

    Fig. Fig. 1: Terminal locations for the igniter and ignition coil-Integra

    1. Remove the distributor cap, rotor and leak cover.
    2.  
    3. Turn the ignition switch ON check for battery voltage between the positive terminal and ground. Voltage should be present. If voltage is not present, check for an open in the BLK/YEL wire or a disconnected terminal.
    4.  
    5. If voltage is present, disconnect the BLK/YEL wire from the igniter. Check for battery voltage between the BLK/YEL positive wire and ground. If voltage is not present, check for an open in the BLK/YEL wire between the ignition coil and the igniter.
    6.  
    7. If voltage is present, disconnect the WHT/BLU wire from the igniter. Check for battery voltage between the WHT/BLU wire and ground. Voltage should be present. If voltage is not present, check for an open in the WHT/BLU wire between the ignition coil and the igniter or a disconnected terminal.
    8.  
    9. If voltage is present, check for continuity between the igniter body and distributor housing.
    10.  
    11. If all tests check good and the system still fails to function, replace the igniter.
    12.  

    1986-1990 LEGEND

    See Figure 2



    Click image to see an enlarged view

    Fig. Fig. 2: Testing voltage points at the igniter harness-1986-90 Legend

    1. Disconnect the 4 pin connector on from the igniter.
    2.  
    3. Turn the ignition switch ON . Check for voltage between the BLK/YEL wire and ground. Battery voltage should be present.
    4.  
    5. If not, check the BLK/YEL wire for voltage, between the ignition switch, ignition coil and igniter, if voltage is present, proceed to the next step. If voltage is not present, repair open circuit.
    6.  
    7. Turn the ignition switch ON . Check for voltage between the BLK/YEL wire and ground. Voltage should be present.
    8.  
    9. If voltage is not present, check the BLU wire, between the ignition coil and igniter. Also check for voltage at the ignition coil.
    10.  
    11. If voltage is not present, proceed to next step.
    12.  
    13. Check the for voltage at the RED/BLU wire, between the PGM-FI ECU and igniter.
    14.  
    15. If all test check good, replace the igniter unit.
    16.  

    1991-93 LEGEND

    See Figure 3



    Click image to see an enlarged view

    Fig. Fig. 3: Testing the igniter-1991-93 Legend

    1. Disconnect the 8 pin connector from the igniter. Make the following tests at the harness pins.
    2.  
    3. Check the BLK wire and BLK/O wire for continuity to ground. Continuity should exists. If not, check for poor ground connection at G102, for Legend. If okay, check for a faulty ignition coil or and open circuit.
    4.  
    5. Turn the ignition switch ON , check for voltage at between the following circuits. Voltage should be present at each point:
      1. WHT and ground
      2.  
      3. WHT/GRN and ground
      4.  
      5. WHT/BLK and ground
      6.  
      7. WHT/BLU and ground
      8.  
      9. WHT/YEL and ground
      10.  
      11. WHT/RED and ground
      12.  

    6.  
    7. If voltage was not present at each point, check for a blown fuse; No. 25 fuse for Legend. Both fuses are (30 amp). If ok, check for a faulty ignition coil or an open circuit.
    8.  

    VIGOR
    1. Disconnect the 4 pin connector from the igniter.
    2.  
    3. Check for continuity between the BLK wire and ground.
    4.  
    5. If there is no continuity, proceed to the next step. If continuity is present, check for an open in the BLK wire, disconnected terminals or a poor ground connection.
    6.  
    7. With the ignition switch ON , there should be battery voltage between the BLK/YEL wire and BLK wire.
    8.  
    9. If voltage is not present, check for an open in the BLK/YEL wire, a disconnected terminal or perform a coil test. If voltage is present, proceed to the next step.
    10.  
    11. With the ignition switch ON , there should be battery voltage between the BLU wire and BLK wire.
    12.  
    13. If voltage is not present, check for, an open in the BLU wire between the ignition coil and the igniter or perform a coil test.
    14.  

    IGNITION COIL



    Testing
    INTEGRA

    See Figure 4



    Click image to see an enlarged view

    Fig. Fig. 4: Coil resistance test-Integra

    1. With ignition switch OFF , remove the distributor cap.
    2.  
    3. Remove the 2 screws to disconnect the BLK/YEL front terminal A and WHT/BLU from terminal B of the coil.
    4.  
    5. Using an ohmmeter, check resistance between terminals. Replace coil if resistance is not within specification.
    6.  

    Resistance will vary with coil temperature. Specifications are at 70°F (20°C).

    1. Check that the primary winding resistance between terminals A and B is 0.6-0.8 ohms.
    2.  
    3. Check that the secondary winding resistance between terminals A and the coil tower is 9760-14640 ohms.
    4.  
    5. Replace coil if the resistance is not within specifications.
    6.  

    1986-90 LEGEND

    See Figures 5 and 6



    Click image to see an enlarged view

    Fig. Fig. 5: Coil resistance test-1986-90 Legend with manual transaxle



    Click image to see an enlarged view

    Fig. Fig. 6: Coil resistance test-1986-90 Legend with automatic transaxle and Vigor

    1. With ignition switch OFF , disconnect primary connectors and coil wire.
    2.  
    3. Using an ohmmeter, check resistance between terminals. Replace coil if resistance is not within specification.
    4.  

    Resistance will vary with coil temperature. Specifications are at 70°F (20°C).

    1. Check that the primary winding resistance between terminals A and D is 0.3-0.4 ohms.
    2.  
    3. Check that the secondary winding resistance between terminals A and the coil tower. If equipped with manual transaxle the resistance will be 9040-13560 ohms, if equipped with automatic transaxle, the resistance will be 14400-21600 ohms.
    4.  
    5. Check that the resistance between B and D terminals is 2090-2310 ohms.
    6.  
    7. Check continuity between A and C terminals. Replace coil if no continuity.
    8.  

    1991-93 LEGEND

    See Figure 7



    Click image to see an enlarged view

    Fig. Fig. 7: Testing the coil resistance-1991-93 Legend

    1. With the ignition switch OFF . Remove the ignition coil.
    2.  
    3. Using an ohmmeter, check resistance between terminals. Replace coil if resistance is not within specification.
    4.  

    Resistance will vary with coil temperature. Specifications are at 77°F (25°C)

    1. Check that the primary winding resistance between terminals A and D is 0.9-1.1 ohms.
    2.  
    3. If the primary winding resistance is ok, substitute a known good ignition coil and check the system operation. If the system is normal, replace the original ignition coil.
    4.  

    VIGOR
    1. With the ignition switch OFF , disconnect the 4 pin connector and ignition coil wire.
    2.  
    3. Using an ohmmeter, check resistance between terminals. Replace coil if resistance is not within specification.
    4.  

    Resistance will vary with coil temperature. Specifications are at 70°F (20°C)

    1. Check that the primary winding resistance between terminals A and D is 0.3-0.5 ohms.
    2.  
    3. Check that the secondary winding resistance between terminals A and the coil tower the resistance should be between 10800-16200 ohms.
    4.  
    5. Check that the resistance between B and D terminals is 2090-2310 ohms.
    6.  
    7. Check continuity between A and C terminals. Replace coil if no continuity.
    8.  

    RADIO CONDENSER



    Capacity Test
    1. Using an appropriate condenser tester, measure the condenser capacity.
    2.  
    3. The condenser capacity should be 0.47plus or minus0.09 microfarads.
    4.  

    Although the radio noise condenser is intended to reduce ignition noise, condenser failure may can cause the engine to stop running.

     
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