Code 61

This DTC flashes the CHECK TRANS indicator and sets the BACKUP MODE.

CIRCUIT DESCRIPTION:
- The Transmission Control Module (TCM) is calculating the slippage of the Converter and transmission based upon the Engine Speed, the Output Speed and the current gear ratio.
- The slippage of the converter at a high enough engine speed is low. Then the transmission should not slip more than a given value when there is no shift.

DIAGNOSTIC AIDS:
- This Diagnostic is not an electrical test done by the TCM but a test between different information ("logic test").
- Detection conditions:
- Engine Speed > 3500 RPM
- Using the ratio of the current gear the Converter Slippage is calculated based upon the engine speed and the output speed. This slippage must be more than:
473 RPM in 4st gear
536 RPM in 3rd gear
556 RPM in 2nd gear
595 RPM in 1st gear
- No malfunction: Engine Speed (DTC 13). Output Speed (DTC 11). Downshift Protection (DTC 62).
- The last change of shift solenoid was more than 3 seconds ago.
- The conditions need to be present for at least 3.0 seconds.
- Action after the detection time: BACKUP MODE.
- Recovery conditions: To recover, do an IGNITION CYCLE.