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Inspect Electric Water Pump No.1

Warning

<<High voltage>>

• Always observe the following thoroughly to ensure safety when inspecting or removing/installing parts in the motor compartment. Otherwise, the high voltage circuit may operate on the vehicle regardless of whether or not the main power is switched OFF or ON (READY off or on). If this occurs, it could cause electrical shock and result in serious injury or, in the worst case, death.

― Do not perform normal charging or quick charging

― Access connected vehicle maintenance mode (MyMazda App connected vehicle)

― Cancel climate control timer

Warning

• Always observe the following thoroughly to ensure safety when inspecting or removing/installing parts in the motor compartment. Otherwise, the cooling fan may operate on the vehicle regardless of whether or not the main power is switched OFF or ON (READY off or on). If this occurs, it could cause injuries such as lacerations and from getting caught in the cooling fan.

― Do not perform normal charging or quick charging

― Access connected vehicle maintenance mode (MyMazda App connected vehicle)

― Cancel climate control timer

• The EV system is hot immediately after driving and charging, and can cause severe burns. Turn off the EV system and wait until it is cool before performing the servicing.

• If the cooling system cap is removed while the EV system is hot, hot coolant may be ejected, causing severe burns or injury. Perform the removal of the cooling system cap when the EV system is cool.

• When removing the cooling system cap, cover the cooling system cap with a clean cloth and remove it slowly.

Note

• Verify the servicing history and if air infiltration in the coolant passage is suspected, perform air bleeding according to the servicing location before inspection. (See ENGINE COOLANT REPLACEMENT.)

• The electric water pump No.1 uses a waterproof connector. Perform a DTC/visual inspection because the voltage/waveform cannot be inspected.

DTC inspection

1.Perform a DTC inspection using the M-MDS to verify if any electric water pump No.1-related DTCs are detected. (Refer to [DTC INSPECTION] in the troubleshooting manual)

DTC is detected

• Inspect for possible causes of detected DTCs in the order from the top. (Refer to [DTC TABLE [PCM]] in the troubleshooting manual)

― If the malfunction is not resolved, replace the electric water pump No.1.

No DTC is detected

• Perform a visual inspection. (See Visual inspection)

Visual inspection

Note

• Perform the procedure with the electric water pump No.1 removed.

1.Visually inspect the electric water pump No.1 for damage and the connector for damage or corrosion.

• There is damage or corrosion

― Repair or replace the malfunctioning location.

• No damage or corrosion

― The electric water pump No.1 is normal, therefore the inspection is completed.