With 4L60E Transmission

DTC 82 1-2 Shift Solenoid Circuit Fault:

1-2 Shift Solenoid Circuit:

CIRCUIT DESCRIPTION
Ignition voltage is supplied directly to the 1-2 shift solenoid. The Powertrain Control Module (PCM) controls the solenoid by providing the ground path through CKT 1222.

DIAGNOSTIC TROUBLE CODE (DTC) 82 WILL SET WHEN
The PCM commands the solenoid "ON" and voltage remains high for 2 seconds. The PCM commands the solenoid "OFF" and voltage remains low for 2 seconds.

ACTION TAKEN (PCM will default to)
The transmission will only allow second and third gear, or first and fourth gear. DTC 82 will be stored in the PCM memory but will not turn "ON" the Malfunction Indicator Lamp (MIL).

DTC 82 WILL CLEAR WHEN:
The fault condition(s) no longer exist, and the ignition switch is cycled "OFF" then "ON."

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
If the voltage remains high for at least 2 seconds, DTC 82 will set. If the voltage drops for more than 2 seconds, DTC 82 will set.
1. This test checks the function of the 1-2 shift solenoid and the internal transmission wiring harness.
2. This test checks for power to 1-2 shift solenoid from the ignition through the fuse.

DIAGNOSTIC AIDS
Check all connections for the transmission.
Refer to PCM Intermittent Diagnostic Trouble Codes or Performance. Testing and Inspection
An open in the ignition feed circuit can cause multiple DTC(s) to set.