TM 9-2320-280-20-1
TRANSMISSION SYSTEM
(4L80-E)
DTC 81
2-3 Shift Solenoid Circuit Fault
Circuit Description:
Ignition voltage is supplied directly to the 2-3 shift
solenoid. The TCM controls the solenoid by providing
the ground path through CKT 315A to TCM.
DTC 81 Will Set When:
l The TCM commands the solenoid “ON” and
voltage remains high.
c The TCM commands the solenoid “OFF” and
voltage remains low.
. All conditions are met for 2 seconds.
DTC 82
1-2 Shift Solenoid Fault
Circuit Description:
Ignition voltage is supplied directly to the 1-2 shift
solenoid. The TCM controls the solenoid by providing
the ground path through CKT 237A to TCM.
DTC 82 Will Set When:
l The TCM commands the solenoid “ON” and
voltage remains high.
l The TCM commands the solenoid “OFF” and
voltage remains low.
l All conditions are met for 2 seconds.
REFERENCE INFORMATION
DTC 83
TCC Solenoid (PWM) Circuit Fault
Circuit Description:
The control module supplies a ground through an
internal Quad-Driver Module (QDM) allowing
current to flow through the solenoid coil according
to the duty cycle (percentage of “ON” and “OFF”
time). This current flow through the solenoid coil
creates a magnetic field that magnetizes the
solenoid core. The magnetized core attracts the
check-ball to seat against spring pressure. This
blocks the exhaust for the TCC signal fluid and
allows 2-3 drive fluid to feed the TCC signal circuit.
The TCC signal fluid pressure acts on the TCC
regulator valve to regulate line pressure and to
apply fluid pressure to the TCC shift valve. When
the TCC shift valve is in the “apply” position,
regulated apply fluid pressure is directed through
the TCC valve to apply the torque converter clutch.
DTC 83 Will Set When:
l
l
l
The TCM commands the solenoid “ON” and
voltage remains high.
The TCM commands the solenoid “OFF” and
voltage remains low.
AU conditions are met for 2 seconds.
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