Flexible Service System (FSS): Notes
The Flexible Service System (FSS) is a demand-activated engine oil service system. The FSS will illuminate a symbol (2) in the instrument cluster to indicate to the driver when a particular service is due. After a level has dropped below a warning threshold, the remaining distance or the remaining time and the tool symbol (2) are displayed in the panel of the odometer.
The FSS is supplied the time intervals from the digital clock in the instrument cluster. The remaining information is supplied by the Powertrain Control Module (PCM) and the Controller Antilock Brake (CAB) via the Controller Area Network (CAN) data bus. The data required for FSS from the CAN includes the following:
- The four wheel speed sensors from the CAB.
- Coolant temperature from the PCM.
- Engine speed from the PCM.
- Load torque from the PCM.