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voltage specs? please

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josherino

15+ Year Contributor
148
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Sep 18, 2004
Ft Collins, Colorado
I am trying to get this ignition problem out of the way, so if someone knows the voltage range for the coilpack (primary and secondary), CAS, and power transistor (5 prong) from a 90 please inform me. Also, I wanted to use a volt meter to test all of this. How do I go about testing the 90 CAS and the 90 power transistor?
 
josherino said:
I am trying to get this ignition problem out of the way, so if someone knows the voltage range for the coilpack (primary and secondary), CAS, and power transistor (5 prong) from a 90 please inform me. Also, I wanted to use a volt meter to test all of this. How do I go about testing the 90 CAS and the 90 power transistor?

Do you have a service manual? Most of this is covered in it. But I'll give you the basics:

Testing a 1990 CAS:
With key ON, battery voltage (or approx) should be present on terminal 3 of the CAS electrical connector. Terminal #2 should indicate 4.8 - 5.2 volts. FYI, the terminals are in the order "4 - 3 - 2 - 1" when looking at the plug.

Power Transistor:

Connect the Power Transistor to a 1.5v (AA) battery via jumper wires. Connect the Positive wire to terminal 2, and the Negative to terminal 3. Measure resistance on terminals 1 + 3, then detach the Positive jumper wire and repeat. When you remove the positive jumper, there should be no continuity. Conversely, when the power transistor is energized, there should be resistance present.
That tests the 1 + 4 cylinders. To test 2 + 3 cylinders, connect the negative wire (from the AA battery) to terminal 3 and the positive to terminal 5. Now, measure resistance between terminals 3 and 6. Then remove the positive lead and repeat. Once again, you're looking for continuity when the jumper wires are present, and no continuity when you remove the power wire.

Edit: the terminals are in the following order, when looking at the connector: [ 1 - 2 - 3 - X - 5 - 6 ]

Coilpack:
No voltage tests for this - resistance only. I gave you the resistance specs in the other thread, but in case anyone else needs them, here they are again (for a 1990)
Primary Coil Resistance: 0.77 - 0.95 ohms
Secondary Coil Resistance: 10,300 - 13,900 ohms
 
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