Lexus ES: 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.
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*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.
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(b) Remove the 2 screws and clip. |
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(c) Pull down the No. 1 engine under cover.
NOTICE:
Do not damage the No. 1 engine under cover.
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(d) Connect a hose with an inside diameter of 8.3 mm (0.327 in.) to the drain cock as shown in the illustration. |
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(e) Loosen the drain cock plug indicated in the illustration and drain the coolant. |
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(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
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(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. |
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(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 |
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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.
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(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. |
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3. INSPECT FOR COOLANT LEAK (for Inverter)
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READ NEXT:
Differential Oil
Components
COMPONENTS
ILLUSTRATION
*1
REAR DIFFERENTIAL FILLER PLUG
*2
REAR DIFFERENTIAL DRAIN PLUG
*3
GASKET
Components
COMPONENTS
ILLUSTRATION
*1
FRONT FLEXIBLE HOSE
*2
GASKET
*3
BRAKE LINE
*4
FRONT SPEED SENSOR
SEE MORE:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the window defogger system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS HINT:
In troubleshooting, confirm that the problem sym
Rain Sensor Malfunction (B1400)
DESCRIPTION This DTC is stored when the rain sensor detects an internal malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC Output from B1400 Rain Sensor Malfunction
IG power source voltage is 9.5 V or more
Either of the following is dete
