DTC 39

DTC 39 TCC Stuck "OFF":

TCC:

CIRCUIT DESCRIPTION
The Transmission Control Module (TCM) commands the Torque Converter Clutch (TCC) PWM solenoid "ON" by modulating TCC signal fluid acting on the converter clutch shift valve. Then TCC apply fluid applies the torque converter clutch.

DTC 39 WILL SET WHEN
^ No DTC(s) 28, 71, or 74.
^ TCC is commanded "ON."
^ TCC slip speed greater than 65 RPM.
^ Trans range in D3 or D4.
^ 2nd or 3rd gear.
^ All conditions are met for two seconds.

ACTION TAKEN (TCM will default to)
No 4th gear in hot mode.

DTC 39 WILL CLEAR WHEN
The fault condition no longer exists, 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 checks the mechanical and hydraulic operation of the TCC while commanded "ON" by the TCM.

DIAGNOSTIC AIDS
Snapshot mode will record 5 data parameters per second.