On-Board Diagnostics
DescriptionThe self-diagnosis system integrated in the powertrain control module (transmission) diagnoses malfunction of the main sensors (input), solenoid valves (output), and of the powertrain control module (transmission) itself.
Malfunctions or intermittent malfunctions are memorized in the powertrain control module (transmission) to later be output as diagnostic trouble codes.
The Self-Diagnosis Checker can be used to retrieve these diagnostic trouble codes. The Self-Diagnosis Checker indicates a malfunction by displaying a code and sounding a buzzer.
When the TAT and GND terminals of the data link connector are jumped with the ignition switch ON, the powertrain control module (transmission) outputs any memorized diagnostic trouble codes by flashing the hold indicator.