System Overview: Signals
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
The table below summarizes input and output signals to and from the combustion preheater module. The signal types are divided into directly connected signals, serial communication and Control area network (CAN) communication. The illustration below displays the same information with the Volvo part numbers.
| Input signals | Output signals |
| Directly connected: | Directly connected: (power supply unless otherwise stated) |
| Flame sensor (photo sensor) | Fuel pump |
| Coolant temperature sensor (NTC resistor) | Water pump |
| Fan motor reading (Electromotive force supply) | Glow plugs (pulse width modulation (PWM)) |
| Combustion fan (pulse width modulation (PWM)) | |
| (The supply relay must be active before the components can be activated) | |
| Via serial communication: | Via serial communication: (The heater communicates with the central electronic module via serial communication) |
| Start/stop signal for the heater | Heater operating status |
| Coolant temperature | |
| Diagnostic trouble code (DTC) list | |
| Heater running time | |
| Via Control Area Network (CAN): | Via CAN communication: (The heater communicates with the rest of the Control area network (CAN) via the central electronic module) |
| ECM, 4/46 | Driver Information Module, 5/1 |
| Driver Information Module, 5/1 | Steering wheel module, 3/130 |
| Steering wheel module, 3/130 | Climate control module, 3/112 |
| Climate control module, 3/112 | Accessory Electronic Module, 4/78 |
| Rear electrical module, 4/58 | |
| Driver's door module/passenger door module, 3/126-127 | |
| Accessory Electronic Module, 4/78 | |
| SRS, 4/9 |