Transmission is in wrong gear


Before testing, touch the test leads together. The meter should read zero or close to zero. If it reads a number, for example 5 ohms, then you will need to subtract 5 ohms from each reading.


With the ignition off, disconnect the solenoid harness from the controller. Measure the resistance of all solenoids.

The TCC On/Off solenoid should be 12-28 Ohms.




The TCC PWM solenoid should be 7-20 Ohms.
Earlier transmissions won't have this solenoid, so checking it will show an open circuit. (50k - ∞)




The EPC solenoid should be 3-6 Ohms.




Shift solenoid 1 should be 12-28 Ohms.




Shift solenoid 2 should be 12-28 Ohms.




For 1996 and up, the 3/2 downshift solenoid should be 12-28 Ohms.
For 1995 and earlier, it should be 7-20 Ohms.






4L60E / 4L65E: Problem 2, Routine 5