Powertrain Controls - ECM/PCM

DTC 81 2-3 Shift Solenoid Circuit Fault:

2-3 Shift Solenoid Circuit Fault:

Gear/Shift Solenoid Status Chart:

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

DTC 81 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)
If the solenoid is shorted "OFF" third gear only will occur. If the solenoid is shorted "ON" second gear only will occur. DTC 81 will be stored in the PCM memory but will not turn "ON" the MIL (Malfunction Indicator Lamp).

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.
If the voltage remains high for at least 2 seconds, DTC 81 will set. If the voltage drops for more than two seconds, DTC 81 will set.
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 Intermittent. Testing and Inspection
An open in the ignition feed circuit can cause multiple DTC(s) to set.