Code 55

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

CIRCUIT DESCRIPTION:
- The brake switch is a switch on the brake pedal that is used to provide the information: brakes are applied. This is used by different features: cruise control, stop light and Transmission Control Module (TCM).
- The TCM uses the information (brakes applied) mainly to release the Torque Converter Clutch (TCC).
- The brake switch is constantly connected to battery when the pedal is released. TCM terminal D9 is connected to Voltage.
- The brake switch is opened when the pedal is pressed. TCM terminal D9 is grounded.

DIAGNOSTIC AIDS:
- This Diagnostic is not an electrical test done by the TCM but a test between different information ("logic test").
- Detection conditions:
- Brake seen as applied during an acceleration from less than 10 Km/h to more than 60 Km/h within 6 seconds.
- After this acceleration the vehicle speed was higher than 60 Km/h during at least 6 seconds.
- No Malfunction: Output Speed (DTC11).
Downshift Protection (DTC62).
- The conditions need to be present for at least 5 times during an ignition cycle.
- Action after the detection time: No action but, as the brake is seen as applied, the TCC is never applied.
- Recovery conditions: To recover, brake has to be released.