On-Board Diagnostics System
On-board Diagnostic SystemA: FUNCTION
- The on-board diagnostic system detects malfunction and generates and displays the codes corresponding to the location of each malfunction. The malfunction indicator light (AT OIL TEMP light) on the combination meter blinks to indicate occurrence of a failure or error.
- If the malfunction indicator light lights up as a result of TCM detecting a malfunction, the diagnostic trouble code (DTC) corresponding to the malfunction is stored in TCM.
- When checking DTC on the models supporting OBD-II, it is required to connect Subaru Select Monitor (SSM) to data link connector.
- To facilitate each function and failure diagnosis, a diagnostic system that supports SSM is used.
- The on-board diagnostic system detects electrical failures or system errors as shown below.
If a malfunction is detected, the system notifies the malfunction by blinking the AT OIL TEMP light.
B: OPERATION OF AT OIL TEMP LIGHT
At engine start, the AT OIL TEMP light illuminates to prove out and then turns off, as shown in "Normal operation" in the figure below. If some malfunction has occurred, the light keeps blinking as shown in "Abnormal operation" in the figure below.
