Code 82, 1-2 Shift Solenoid Circuit Fault: Notes

The PCM continually monitors voltage on each circuit connected to the quad-driver, looking for either low or high voltage, depending on the commanded state of the devices connected to it. Code 82 will set if a fault has been detected on the 1-2 shift solenoid circuit.

If 1-2 shift solenoid is commanded on by the PCM, voltage on that circuit should drop when solenoid is grounded. If Code 82 sets, the transmission will allow 2nd and 3rd gears only, or 1st and 4th gears only. If voltage stays up for at least 2 seconds after 1-2 shift solenoid is commanded on, Code 82 will set. If 1-2 shift solenoid is off, voltage on the circuit should be high. If voltage drops for more than 2 seconds, Code 82 will set.

1. This test checks 1-2 shift solenoid and internal transmission wiring for short circuits.
2. This test checks for power, from the ignition through the fuse, to the shift solenoid.
3. This test ensures circuit No. 1222 is not shorted to ground.
4. This test checks ability of PCM to ground or control 1-2 shift solenoid. If bidirectional scan tester is not available, solenoid may be activated by grounding ALDL test terminal "B" with ignition on and engine off.