II. TCC Enable Conditions

FIGURE 1 - TCC Controls and Components:

Enable conditions are those vehicle operating conditions that must be present before the ECM will provide the ground for the TCC solenoid. The ECM controls the apply of TCC by grounding circuit # 422 (see Figure 1) which energizes the TCC solenoid, shifts the apply valve, and thereby supplies oil pressure to the [1][2]Torque Converter Clutch.


If one or more of the conditions are not met, the ECM will interrupt the ground path for the circuit causing the [1][2]Torque Converter Clutch to disengage. In addition, for 1983 and 1984, if hard codes 21, 22, 24, 28, 29, 33, 35 or 36 are present, TCC will be disabled. In 1982, these codes did not disable TCC. If any of these codes are stored in memory, they must be repaired before attempting to repair a code 39.