Chrysler Colt/Vista 1990-1993 Repair Information

Power Transistors

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TESTING



See Figures 1, 2, 3 and 4

When testing the power transistor(s), an analog-type circuit tester should be used.

1.5L Engine
1990
  1. Connect the negative (-) terminal of a 1.5 volts dry cell to terminal 2 of the power transistor; then check whether there is continuity between terminals 2 and 3 when terminal 1 and the positive (+) terminal are connected and disconnected.
  2.  
  3. If the results are not as indicated, replace the power transistor(s).
  4.  



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Fig. Fig. 1: Checking secondary coil resistance, SOHC engines

1991-93
  1. Connect the negative (-) terminal of a 1.5 volts dry cell to terminal 7 of the power transistor; then check whether there is continuity between terminals 7 and 2 when terminal 8 and the positive (+) terminal are connected and disconnected.
  2.  
  3. If the results are not as indicated, replace the power transistor(s).
  4.  

1.6L Engine


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Fig. Fig. 2: Checking nos. 1 & 4 cylinders at the power transistor, on DOHC engines with a distributor



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Fig. Fig. 3: Checking nos. 2 & 4 cylinders at the power transistor, on DOHC engines with a distributor

NO. 1-4 Coil Side
  1. Connect the negative (-) terminal of a 1.5 volts dry cell to terminal 3 of the power transistor; then check whether there is continuity between terminals 7 and 3 when terminal 6 and the positive (+) terminal are connected and disconnected.
  2.  

Connect the negative (-) probe of the tester to terminal 7 of the power transistor.

NO. 2-3 Coil Side
  1. Connect the negative (-) terminal of a 1.5 volts dry cell to terminal 3 of the power transistor; then check whether there is continuity between terminals 1 and 3 when terminal 2 and the positive (+) terminal are connected and disconnected.
  2.  

Connect the negative (-) probe of the tester to terminal 1 of the power transistor.

  1. If the results of the tests are not as indicated above, replace the power transistor(s).
  2.  

2.0L Engine
1990
NO. 1-4 Coil Side
  1. Select the ohm range on the analog tester and connect the tester between terminals 1 and 3.
  2.  
  3. Connect the positive (+) lead of a 1.5 volts dry cell between terminal 2 and the negative lead to terminal 3.
  4.  
  5. Continuity should be indicated when the dry cell is connected. No continuity should be indicated when the dry cell is disconnected.
  6.  

NO. 2-3 Coil Side
  1. Select the ohm range on the analog tester and connect the tester between terminals 6 and 3.
  2.  
  3. Connect a 1.5 volts dry cell between terminals 3 and 5, with the positive (+) terminal and the negative (-) terminal connected to terminal 5 and terminal 3 respectively.
  4.  
  5. Continuity should be indicated when the dry cell is connected. No continuity should be indicated when the dry cell is disconnected.
  6.  
  7. If the results of the tests are not as indicated above, replace the power transistor(s).
  8.  

1991-93
NO. 1-4 Coil Side
  1. Connect the negative (-) terminal of a 1.5 volts dry cell to terminal 3 of the power transistor; then check whether there is continuity between terminals 7 and 3 when terminal 6 and the positive (+) terminal are connected and disconnected.
  2.  

Connect the negative (-) probe of the tester to terminal 7 of the power transistor.

NO. 2-3 Coil Side
  1. Connect the negative (-) terminal of a 1.5 volts dry cell to terminal 3 of the power transistor; then check whether there is continuity between terminals 1 and 3 when terminal 2 and the positive (+) terminal are connected and disconnected.
  2.  

Connect the negative (-) probe of the tester to terminal 1 of the power transistor.

  1. If the results of the tests are not as indicated above, replace the power transistor(s).
  2.  

2.4L ENGINE


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Fig. Fig. 4: Checking the power transistor for continuity on distributorless engines

  1. Connect the negative (-) terminal of a 1.5 volts dry cell to terminal 2 of the power transistor; then check whether there is continuity between terminals 3 and 2 when terminal 1 and the positive (+) terminal are connected and disconnect
  2.  
  3. If the results are not as indicated, replace the power transistor(s).
  4.  

 
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