Powertrain Controls - ECM/PCM

DTC 81 2-3 Shift Solenoid Circuit Fault:

2-3 Shift Solenoid Circuit:

CIRCUIT DESCRIPTION
Ignition voltage is supplied directly to the 2-3 shift solenoid. The Transmission Control Module (TCM) controls the solenoid by providing the ground path through CKT 1223.

DTC 81 WILL SET WHEN
^ The TCM commands the solenoid "ON" and voltage remains high.
^ The TCM commands the solenoid "OFF" and voltage remains low.
^ All conditions are met for 2 seconds.

ACTION TAKEN (TCM will default to)
If the solenoid is shorted "OFF" third gear only will occur. If the solenoid is shorted "ON" second gear only will occur maximum line pressure, and no Torque Converter Clutch (TCC). DTC 81 will be stored in the Transmission Control Module (TCM) memory but will not turn "ON" the Malfunction Indicator Lamp (MIL).

DTC 81 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.
1. This test checks the function of the 2-3 shift solenoid and the internal transmission wiring.
2. This test checks for power to 2-3 shift solenoid from the ignition through the fuse.

DIAGNOSTIC AIDS
Check all connections at the transmission.
Refer to "TCM Intermittent Diagnostic Trouble Codes or Performance." PCM/TCM Intermittent Diagnostic Trouble Code or Performance
An open in the ignition feed circuit can cause multiple DTC(s) to set.