On-board Diagnostics System: Function
WARNING: This page is about a different car, the 2008 Subaru Tribeca, 2008 Subaru Outback, and 2008 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
- The on-board diagnosis system detects and indicates a fault by generating a code corresponding to each fault location. The engine malfunction indicator light (SPORTS indicator light) on the combination meter indicates occurrence of a fault or abnormality.
- When the engine malfunction indicator light comes on as a result of detection of a fault by the TCM, the corresponding diagnostic trouble code (DTC) is stored in the TCM.
- On OBD-II available vehicles, it is necessary to connect the SUBARU Select Monitor (SSM) to the data link connector in order to check the DTC.
- To provide various functions and to facilitate fault isolation, a diagnosis system compatible with the SSM is used.
- The on-board diagnostics system detects the following electrical system faults or abnormalities in the system.
ATF TEMPERATURE SENSOR REFERENCE
| ATF temperature sensor 1, 2 | Inhibitor switch |
|---|---|
| Turbine speed sensor 1, 2 | CAN communication system |
| Front and rear wheel speed sensors | Interlock decision |
| Lockup solenoid (circuit, function) | 1st engine brake abnormal |
| Line pressure solenoid (circuit) | Range lock solenoid (circuit) |
| Front brake solenoid (circuit, function) | PN signal output |
| Input clutch solenoid (circuit, function) | PVign power circuit (PVign relay) |
| High and low reverse clutch solenoid (circuit, function) | Backup light relay output circuit |
| Direct clutch solenoid (circuit, function) | TCM data communication abnormal |
| Low coast brake solenoid (circuit, function) | Lateral G sensor |
| Transfer solenoid (circuit) | Brake switch |
| Front brake hydraulic switch | Sports mode switch |
| Input clutch hydraulic switch | Engine speed signal |
| High and low reverse clutch hydraulic switch | 1, 2, 3, 4, 5, R gear ratios |
| Direct clutch hydraulic switch |
If a fault is detected, the system tells the fault by causing the SPORTS indicator light to blink.