We disable the water pump programmatically using the “Truck Tools” program on your vehicle

The coolant pump of the two-stage clutch can operate in two modes. At high speed, the coolant pump impeller is driven directly from the crankshaft via a poly V-belt. Low speed impeller speed is approximately 50% of high speed.

1. Impeller
2. Static fin
3. Speed ​​sensor
4. Electromagnet
5. Bearing (clutch)
6. Friction disc
7. Induction plate (aluminum) with integrated metal plates with cooling fins
8. Shaft
9. Bearing (shaft)
10. Permanent magnets
11. Pulley without intarder
12. Pulley with intarder
13. Chuck housing
14. Toothed wheel
15. Rotary seal

Control:

Depending on the cooling requirements of the engine or vehicle, the ECU The PCI activates the coolant pump solenoid and changes the impeller speed:

• solenoid on, pump runs at high speed;
• solenoid off, pump runs at low speed.

When power is lost, the coolant pump’s safe speed is low speed.

If the coolant pump with a dual-stage clutch is detected to be stalled, a fault is logged, which is used to disable the EGR system. The PCI closes the EGR valve and reduces fuel flow to prevent engine damage.