On-Board Diagnostic System Description: Notes
For automatic transmission control system, TCM has the following functions. Refer to INSPECTION OF TCM AND ITS CIRCUITS .
- When the ignition switch is turned ON with the engine at a stop, malfunction indicator lamp (MIL) (1) turns ON to check the bulb of the MIL.
- When TCM detects a malfunction in A/T control system (and/or a malfunction which gives an adverse effect to vehicle emission) while the engine is running, TCM requires ECM to make the MIL in the meter cluster of the instrument panel turn ON. TCM stores the malfunction area (DTC according to SAE J2012) in TCM memory.
(If it detects that continuously 3 driving cycles are normal after detecting a malfunction, however, it makes MIL turn OFF although DTC stored in its memory will remain.)
- Malfunctions detected by TCM are stored in its memory as pending DTC, confirmed DTC (current and history) and permanent DTC. The permanent DTC, among others, will be stored in the memory that cannot be manually erased. (For the details, refer to description on PERMANENT DTC .)
- It is possible to communicate through DLC (2) by using not only SUZUKI scan tool but also OBD-II generic scan tool which are in compliance with SAE J1978. (Diagnostic information can be checked and erased by using a scan tool.)
Special Tool
(A): SUZUKI scan tool (SUZUKI-SDT)