Heater Water Pump Circuit

HEATER WATER PUMP CIRCUIT

CIRCUIT DESCRIPTION

The heater water pump assembly sends engine coolant to the heater core assembly while the engine is stopped to prevent heater effectiveness from becoming low.
Directed by the air conditioner amplifier assembly, Hybrid control ECU operates the water pump relay and drives the heater water pump assembly.

Wiring Diagram:

Step 1 - 2:

Step 3 - 4:

INSPECTION PROCEDURE