Automatic transaxle system relies on various measurement data to determine the current control status and extrapolate the necessary compensation values. These values are used to control the actuators and achieve the desired control output. If a problem with the drivetrain, including the transaxle, has been identified, perform self-diagnosis and basic transaxle inspection (oil and fluid inspection) and then check the control system's components using the diagnosis tool.
Control System Composition
Features a fail-safe mechanism that prevents dangerous situations from developing in the event of a transaxle failure.
The limp home mode engages if the transaxle malfunctions, hi this mode, the transaxle operates at a minimal functionality level, making it possible for the vehicle to reach a service center.
Fail-Safe: Prevents dangerous situations from developing in the event of a malfunction.
Limp Home: Maintains minimal functionality (*) in the event of a malfunction, making it possible for the vehicle to reach a service center.
(*) Minimal Functionality: Drive (fixed gear setting), Reverse, and Neutral
TCM is in constant communication with the control system's components (sensors and solenoids). If an abnormal signal is received for longer than the predefined duration. TCM recognizes a fault, stores the fault code in memory, and then sends out a fault signal through the self-diagnosis terminal. Such fault codes are independently backed up and will not be cleared even if the ignition switch is turned off. the battery is disconnected, or the TCM connector is disconnected.
Disconnecting a sensor or an actuator connector while the ignition switch is in the "On" position generates a diagnostic double code (DTC) and commits the code to memory. In such event, disconnecting the battery will not clear the fault diagnosis memory. The diagnosis tool must be used to clear the fault diagnosis memory.
Checking Procedure (Self-diagnosis)
Inspection Procedure (Using the GDS)
1. Turn OFF the ignition switch.
2. Connect the GDS to the data link connector on the lower crash pad.
3. Turn ON the ignition switch.
4. Use the GDS to check the diagnostic trouble code.
5. Repair the faulty part from the diagnosis chart.
6. Erase the diagnostic trouble code.
7. Disconnect the GDS.
Diagnostic trouble codes (DTC) cannot be cleared by disconnecting the battery.