Automatic Transmission

Diagnostic Trouble Code (DTC) 84:

3-2 Control Solenoid Circuit:

CIRCUIT DESCRIPTION
Hydraulically, the 3-2 control solenoid coordinates the apply rate of the 2-4 band with the hydraulic release of the 3-4 clutch during a 3-2 downshift.

The Powertrain Control Module (PCM) continually monitors the 3-2 circuit duty cycle depending on the commanded state of the circuit terminal "B13." When the transmission is in first gear the duty cycle of the solenoid is equal to O ("OFF"). When the transmission is in second gear or higher the duty cycle of the solenoid will be about 90% ("ON"). When the transmission downshifts, 3-2, the duty cycle of the solenoid will drop.

DTC 84 WILL SET WHEN
The PCM commands the solenoid "ON," and the voltage remains high (B+) for 5 seconds or the PCM commands the solenoid "OFF," and the voltage remains low (zero volts) for 5 seconds.

ACTION TAKEN (PCM WILL DEFAULT TO)
A soft landing to third gear and maximum transmission line pressure. Diagnostic Trouble Code (DTC) 84 will be stored in the PCM memory but will not turn "ON" the Malfunction Indicator Lamp (MIL).

DTC 84 WILL CLEAR WHEN
The fault condition(s) no longer exist, and the ignition switch is cycled "OFF" then "ON."

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.

1. This test checks the function of the 3-2 control solenoid and the internal transmission harness.
2. This test checks for power to the 3-2 control solenoid from the ignition through the fuse.

DIAGNOSTIC AIDS
Check all connections at the transmission connector.

The 3-2 control solenoid feedback normally oscillate "ON/OFF" when the duty cycle is applied.

An open in the ignition feed circuit will cause multiple DTCs to set.