Signal Description, Combustion PREHEATER Module (CPM) [2011-2018]: General
The heater has a connector for connection to the vehicle. There are also three external connectors and four internal connectors (three under the heater cover and one under the control module) on the heater.
External connectors
2-pin connector
- #1 30-feed
- #2 Power ground
3-pin connector
- #1 Not used
- #2 Coolant pump, ground.
- #3 Coolant pump, control signal
8-pin connector
- #1 Not used
- #2 Communication cable, remote start unit
- #3 Not used
- #4 Control module communication cable (CAN L)
- #5 Fuel pump, control signal
- #6 Not used
- #7 Control module communication cable (CAN H)
- #8 Not used
Internal connectors
2-pin connector
- #1 Glow plugs
- #2 Glow plugs
4-pin connector
- #1 Not used
- #2 Not used
- #3 Fuel preheating, control signal
- #4 Fuel preheating, ground
8-pin connector
- #1 Distribution valve, signal. Only V60 PHEV and S60L PHEV.
- #2 Coolant temperature sensor, signal
- #3 Overheating sensor, signal
- #4 Not used
- #5 Distribution valve, ground. Only V60 PHEV and S60L PHEV.
- #6 Coolant temperature sensor, ground
- #7 Overheating sensor, ground
- #8 Not used
All values below are measured between the relevant terminal in column 1 and terminal #4 (power ground) unless otherwise stated in parenthesis after the table entry.
NOTE:
It is important to check ground terminals before taking readings.
| U= | DC voltage in volts (V) | UAC = | AC voltage in volts (V) |
| Ubat = | Battery voltage (V) | f = | Frequency in Hertz (Hz) |
| Ulow = | Voltage approximately 0 V | % duty = | Duty cycle (pulse ratio) in percent (%) |
| t = | Time in milliseconds (ms) |
| Terminal connector | Control module terminal | Signal type | Ignition on | Heater running |
Other |
| #1 | - | - | - | - | |
| #2 | #2 8-pin connector | Communication cable, remote start unit | - | - | Digital signal |
| #3 | #1 2-pin connector | 30-feed (Power supply from battery) | U bat | - | |
| #4 | #2 2-pin connector | Power ground (Measured to the negative battery terminal) | U low | - | |
| #5 | - | - | - | - | |
| #6 | #4 8-pin connector | Control modules communication cable (CAN L) | U=2-3 V | Digital signal | |
| #7 | #5 8-pin connector | Fuel pump, control signal | - | Pulsed signal with fixed frequency 5 Hz | Digital signal |
| #8 | - | - | - | - | |
| #9 | #2 3-pin connector | Coolant pump, ground | U low | - | |
| #10 | #3 3-pin connector | Coolant pump, control signal | - | The pulse ratio (% duty) increases with fan speed. | |
| #11 | #7 8-pin connector | Control modules communication cable (CAN H) | U=2-3 V | Digital signal | |
| #12 | - | - | - | - | |