Nissan Leaf. Manual - part 843

COOLANT

HCO-11

< PERIODIC MAINTENANCE >

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PERIODIC MAINTENANCE

COOLANT

Inspection

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COOLANT AMOUNT INSPECTION

• When coolant temperature is low (about 50

°C or less), confirm that

the coolant level of the reservoir tank is in the range from MIN to

MAX. 

• Adjust level if it is outside the range.

CAUTION:

• Refill Genuine NISSAN Long Life Antifreeze/Coolant (blue)

or equivalent in its quality mixed with water (distilled or

demineralized). Refer to 

MA-16, "FOR USA AND CANADA :

Fluids and Lubricants"

 (United States and Canada) or 

MA-17, "FOR MEXICO : Fluids and Lubri-

cants"

 (Mexico).

• Confirm that the reservoir tank cap is tightened. 

LEAKAGE CHECK

• Apply pressure to the cooling system using radiator cap tester (A)

(commercial service tool). Check system for coolant leakage.

CAUTION:

• Remove the degas tank cap when coolant temperature is

low. 

• Perform the inspection with the radiator filled with water.

• Use hose adapter (B) (commercial service tool) between

radiator cap tester (A) (commercial service tool) and the

filler neck so that the degas tank filler neck is not deformed. 

• Be sure to observe the maximum pressure standards. Otherwise, radiator may be damaged.

• If there is a malfunction, repair and replace applicable part.

Draining

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CAUTION:

• Be sure to drain when coolant temperature is cold.

• This should be performed so that coolant does not come in contact with surrounding parts.
1. Remove Li-ion battery undercover. 
2. Remove radiator drain plug  , and drain coolant.

3. Remove reservoir tank and drain the coolant as per the following procedure.

1. Remove radiator upper grille cover.

2. Remove water hose (reservoir tank side) and reservoir tank mounting bolts. 

: MAX
: MIN

JPBIA0102ZZ

Maximum pressure

: Refer to 

HCO-27, "Periodical 

Maintenance Specification"

.

PBIC5121J

: Vehicle front

JPCIA0342ZZ

HCO-12

< PERIODIC MAINTENANCE >

COOLANT

Refilling

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REFILLING

CAUTION:

• Do not reuse O-rings.

• Do not put additive such as waterleak preventive, since it may cause cooling waterway clogging.

• When refilling use Genuine NISSAN Long Life Antifreeze/Coolant (blue) or equivalent in its quality

mixed with water (distilled or demineralized). Refer to 

MA-16, "FOR USA AND CANADA : Fluids and

Lubricants"

 (United States and Canada) or 

MA-17, "FOR MEXICO : Fluids and Lubricants"

 (Mexico).

1. Install reservoir tank if removed and radiator drain plug.

CAUTION:

Be sure to clean drain plug and install with new O-ring.

2. Check that each hose clamp has been firmly tightened.
3. Refill reservoir tank to “MAX” level line with engine coolant.

4. Install reservoir tank cap.
5. Set the vehicle to READY and operate the electric water pump.
6. If reservoir tank fluid level drops, set the vehicle in READY OFF state and fill with coolant to the “MAX” line

of the reservoir tank.

7. Repeat from Step 4 to 7 until the reservoir tank fluid level stops dropping.
8. Operate the electrically-controlled water pump for approximately 10 minutes with the vehicle set in

READY state, and check that the reservoir tank fluid level does not drop.

9. If reservoir tank fluid level drops, repeat from Step 4 to 7.

CHECK WATER FLOW SOUND

CAUTION:

Prior to check, be sure to close windows, doors, and hood, and turn off audio system and other elec-

trical loads.
1. Set the vehicle to READY and operate the electric water pump. 
2. Operate the electric water pump for 1 minute. 
3. Check if water flow sound can be heard from the back of the compartment (near the on board charger). 
4. If water flow sound is heard, operate the electric water pump until it cannot be heard. 
5. When water flow sound cannot be heard, fill the reservoir tank up to "MAX" line.

CAUTION:

• Insufficient coolant may cause low power or stop of vehicle due to insufficient cooling of the traction

motor inverter. Be sure to bleed air thoroughly. 

• Never operate the electric water pump without coolant. 

Radiator drain plug

: Refer to 

HCO-14, "Exploded View"

.

: MAX

: MIN

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RESERVOIR TANK CAP

HCO-13

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RESERVOIR TANK CAP

Inspection

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• Check valve seat   of reservoir tank cap. 

- Check that valve seat is swollen to the extent that the edge of the

plunger cannot be seen when watching it vertically from the top.

- Check that valve seat has no soil and damage.

• Pull negative-pressure valve to open it, and that it close completely

when released.

- Check that there is no dirt or damage on the valve seat of reservoir

tank cap negative-pressure valve. 

- Check that there are no unusualness in the opening and closing

conditions of negative-pressure valve.

• Check reservoir tank cap relief pressure.

- When connecting reservoir tank cap to the radiator cap tester

(commercial service tool) (A) and the radiator cap tester adapter

(commercial service tool) (B), apply engine coolant to the cap seal

surface. 

• Replace reservoir tank cap if there is an unusualness related to the above three.

: Metal plunger

JPBIA0108ZZ

SMA967B

Standard

: Refer to 

HCO-27, "Periodical 

Maintenance Specification"

.

PBIC5122J

HCO-14

< REMOVAL AND INSTALLATION >

RADIATOR

REMOVAL AND INSTALLATION

RADIATOR

Exploded View

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Reservoir tank hose

Reservoir tank cap

Reservoir tank

Chipping guard

Collar

Bushing

Radiator

Clamp

Radiator hose (lower)

Water hose

Pump bracket

Mount rubber

Electric water pump

Radiator hose (upper rear)

Water hose adapter

Radiator hose (upper front)

Water hose

Engine coolant temperature sensor

Gasket

Drain plug

O-ring

Arrow view

To PDM (Power Delivery Module)

To traction motor

: N·m (kg-m,  in-lb)

: Always replace after every disassembly

JPCIA0343GB