Procedure to access the A/T Code Reset function in the OBD scanner
The A/T Code Reset function in an OBD diagnostic scanner is utilized to clear the diagnostic trouble codes and reset the adaptive learning values stored in the transmission control module or transmission control unit of a vehicle’s automatic transmission system.
Allow me to provide you with a more comprehensive explanation regarding its purpose and utilization:
1. Resolving Transmission DTCs: When a fault or issue is detected in the automatic transmission system, the transmission control module sets a DTC and activates the check engine or transmission warning light on the dashboard. The A/T Code Reset function enables technicians to easily clear the DTCs from the TCM’s memory once they have diagnosed and resolved the underlying issue.
2. Resetting Adaptive Learning Values: Automatic transmissions in modern vehicles employ adaptive learning strategies to fine-tune shift points, line pressures, and other parameters according to driving conditions and the driver’s behavior. The TCM’s memory stores these learned values. Following a transmission repair or replacement, the A/T Code Reset function restores the adaptive learning values to their default state. This enables the transmission to effectively relearn and adapt to the new conditions.
3. Getting Ready for Relearn Procedures: Certain transmission repairs or replacements may necessitate the completion of specific relearn procedures following the repair. The A/T Code Reset function readies the TCM for relearn procedures by erasing any current DTCs and restoring the adaptive learning values.
It is crucial to understand that the A/T Code Reset function must be employed only after accurately diagnosing and resolving any transmission problems. It is important to address the underlying problem before attempting to clear codes or reset adaptive values in order to avoid potential issues or improper transmission operation. In addition, certain vehicles may necessitate particular procedures or precautions prior to or following an A/T Code Reset. It is crucial to adhere to the manufacturer’s guidelines in such cases.
Instruction to Access the A/T Code Reset in the OBD Scanner
The A/T Code reset can be accessed by following this instruction.
- Open your OBD scanner.
- Select Local Diagnose if you are using Launch X431.
- Select Car Brand Select Model (auto-detect is better to detect the vehicle VIN).
- Select and check the following: ECMECT (Engine and ECT), ECT (Electronic Controlled Transmission), ECM (Engine Control Module)
- Select Special Function Then click A/T Code Reset Reset.
The sample car model with this feature is the Toyota Alphard 2015 Year model.
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