Code 65

This DTC does NOT flash the CHECK TRANS indicator and does NOT set the BACKUP MODE.

CIRCUIT DESCRIPTION:
The Torque Converter Clutch (TCC) is a normally open exhaust valve. The TCC solenoid is a simple ON/OFF solenoid connected to the adapter case valve body. When the solenoid is energized by the Transmission Control Module (TCM), it opens a fluid port. When the port is open, line pressure actuates the converter clutch control valve which engages the torque converter clutch by exhausting the fluid. The TCM engages the torque converter clutch only when all the following conditions exist:
- The transmission is at operating temperature.
- Brake pedal is released.
- The transmission is operating in second, third or fourth gear.
- The engine is at operating temperature.
- The TCM activates the solenoid by connecting voltage to pin C7 of connector C-91 with a High Side Driver.

DIAGNOSTIC AIDS:
- This Diagnostic is not an electrical test done by the TCM but a test between different information ("logic test").
- Detection conditions:
- The TCC should be ON based upon the TCC SHIFT PATTERN or conditions that turn the TCC ON and slippage > 65 RPM.
- No Malfunction: Engine Speed (DTC13), Output Speed (DTC11), Downshift Protection (DTC62).
- Transmission selector lever range not "Park", "Neutral" or "Reverse."
- Current gear not 1st gear.
- The conditions need to be present for at least 3 seconds.
- Action after the detection time:
- TCC is turned OFF electrically by the TCM.
- Remark: When the TCC is constantly turned ON electrically (short circuit), the hydraulic circuit does not apply the TCC in first gear, so the engine does not stall. However, if the driver brakes sharply in 2nd gear, engine may stall.
- Recovery conditions: To recover, do an IGNITION CYCLE.