Toyota Avalon Service & Repair Manual: Replacement

REPLACEMENT

CAUTION / NOTICE / HINT

CAUTION:

To avoid the danger of being burned, do not remove the reserve tank cap or drain cock plug while the coolant (for inverter) is still hot. Pressurized, hot coolant (for inverter) and steam may be released and cause serious burns.

*1

Reserve Tank Cap

*2

Drain Cock Plug

PROCEDURE

1. DRAIN COOLANT (for Inverter)

CAUTION:

To avoid the danger of being burned, do not remove the reserve tank cap while the coolant (for inverter) is still hot. Pressurized, hot coolant (for inverter) and steam may be released and cause serious burns.

NOTICE:

  • Do not reuse the drained coolant because it may contain foreign matter.
  • Collect the drained coolant and measure its volume to establish a benchmark. When adding coolant, make sure to add more coolant than the measured amount.

(a) Remove the reserve tank cap from the inverter reserve tank assembly.

(b) Remove the 2 screws and clip.

(c) Pull down the No. 1 engine under cover.

NOTICE:

Do not damage the No. 1 engine under cover.

(d) Connect a hose with an inside diameter of 8.3 mm (0.327 in.) to the drain cock as shown in the illustration.

*1

No. 1 Engine Under Cover

*a

Hose

(e) Loosen the drain cock plug indicated in the illustration and drain the coolant.

(f) Tighten the drain cock plug by hand.

(g) Disconnect the hose from the drain cock.

(h) Install the 2 screws and clip.

2. ADD COOLANT (for Inverter)

NOTICE:

  • Do not reuse the drained coolant because it may contain foreign matter.
  • If the vehicle is driven with air in the inverter cooling system, damage may occur and the following DTCs may be stored.

    DTC No.

    Detection Item

    P0A9300

    Inverter "A" Cooling System Performance

    P0C7396

    Motor Electronics Coolant Pump "A" Component Internal Failure

    P0A001C

    Motor Electronics Coolant Temperature Sensor Circuit Voltage Out of Range

    P0A789E

    Drive Motor "A" Inverter Stuck On

    P1C5D19

    Drive Motor "A" Inverter Circuit Current Above Threshold

    P0A7A9E

    Generator Inverter Stuck On

    P0A949E

    DC/DC Converter Stuck On

    P0D3319

    DC/DC Converter Circuit Current Above Threshold

    P0AED1C

    Drive Motor Inverter Temperature Sensor "A" Circuit Voltage Out of Range

    P0C381C

    DC/DC Converter Temperature Sensor "A" Circuit Voltage Out of Range

    P0C3D1C

    DC/DC Converter Temperature Sensor "B" Circuit Voltage Out of Range

    P0E581C

    DC/DC Converter Temperature Sensor 2 Circuit Voltage Out of Range

    P1CCC96

    DC/DC Converter Enable Component Internal Failure

(a) Slowly pour coolant into the inverter reserve tank assembly until it reaches the FULL line.

Standard Capacity:

1.8 liters (1.9 US qts, 1.6 Imp. qts)

NOTICE:

To prevent foreign matter such as dust or dirt from entering the cooling system, make sure to confirm that the container used to add coolant is clean and free of foreign matter.

(b) When using the Techstream:

(1) Connect the Techstream to the DLC3.

(2) Turn the power switch on (IG).

(3) Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Inverter Water Pump.

Powertrain > Hybrid Control > Active Test

Tester Display

Activate the Inverter Water Pump

(4) While adding coolant to the inverter reserve tank assembly to keep the coolant at the FULL line and compensate for the drop in the coolant level as the air bleeds, operate and stop the inverter water pump assembly at 1 minute intervals.

Standard:

Air bleeding from the inverter cooling system is completed when the noise made by the inverter water pump assembly becomes smaller and the circulation of coolant in the inverter reserve tank assembly improves.

HINT:

Loud noises made by the inverter water pump assembly and poor circulation of coolant in the inverter reserve tank assembly indicate that there is air in the cooling system.

(c) When not using the Techstream:

(1) Turn the power switch on (READY). [*1]

(2) Turn the power switch off and add coolant to the FULL line as the coolant level will drop as the air bleeds. [*2]

NOTICE:

  • Be sure to turn the power switch off before adding SLLC.
  • Do not work on the components in the engine compartment while the power switch is on (READY) as the engine will operate intermittently.

(3) Repeat steps [*1] and [*2] until air bleeding from the cooling system is completed.

Standard:

Air bleeding from the inverter cooling system is completed when the noise made by the inverter water pump assembly becomes smaller and the circulation of coolant in the inverter reserve tank assembly improves.

HINT:

Loud noises made by the inverter water pump assembly and poor circulation of coolant in the inverter reserve tank assembly indicate that there is air in the cooling system.

(d) After the air is completely bled from the cooling system, add coolant to the FULL line of inverter reserve tank assembly and install the reserve tank cap.

NOTICE:

Check that the amount of coolant (for Inverter) added is more than the amount drained.

3. INSPECT FOR COOLANT LEAK (for Inverter)

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    Components

    Front Brake Flexible Hose

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