Rear Cooling System [10/2018 - ]: Procedure

1. Remove the deck board assembly.
2. Check the HV inverter cooling fan blockage or clog.

   Specified Condition

   HV inverter cooling fan no blockage or clog.

   Result

   Proceed to
   OK
   NG

3. Install the deck board assembly.

Result: 

NG 

CORRECT THE PROBLEM 

Result: 

OK 

See step  2

1. Remove the deck board assembly.
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Rear Motor Generator / Active Test / Rear Inverter Cooling Fan
6. Perform the active test.

   Powertrain > Rear Motor Generator > Active Test 

   Tester Display
   Rear Inverter Cooling Fan

7. Check that the HV inverter cooling fan operates.

   Result

   Result	Proceed to
   HV inverter cooling fan operates, fan speed is stable and there is no abnormal noise.	A
   HV inverter cooling fan does not operate	B
   HV inverter cooling fan speed is unstable, or there is abnormal noise.

8. Turn the power switch off.
9. Install the deck board assembly.

Result: 

B 

See step  4

Result: 

A 

See step  3

1. Connect hybrid motor control inverter assembly rear connector.
2. Remove HV inverter cooling cover from the hybrid motor control inverter assembly rear.
3. Check the cooling fin blockage or clog

   Specified Condition

   Cooling fin no blockage or clog

   Result

   Proceed to
   OK
   NG

4. Install HV inverter cooling cover from the hybrid motor control inverter assembly rear.
5. Reconnect hybrid motor control inverter assembly rear connector.

Result: 

OK 

REAR COOLING SYSTEM NORMAL (PERFORM NEXT STEP FOR REFERENCED DTC) 

Result: 

NG 

CORRECT THE PROBLEM 

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the service information because this may cause a malfunction.

2. Remove the deck board assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Disconnect the A rear inverter cooling fan connector.
4. Connect the cable to the negative (-) auxiliary battery terminal.
5. Connect the Techstream to the DLC3.
6. Turn the power switch on (IG).
7. Turn the Techstream on.
8. Enter the following menus: Powertrain / Rear Motor Generator / Active Test / Rear Inverter Cooling Fan

   Powertrain > Rear Motor Generator > Active Test 

   Tester Display	Measurement Item	Control Range	Restrict Condition
   Rear Inverter Cooling Fan	Rear inverter cooling fan can be forced to operate.	Stop/Start	-

   Powertrain > Rear Motor Generator > Active Test 

   Tester Display
   Rear Inverter Cooling Fan

9. Check the voltage of connector A (rear inverter cooling fan connection connector) of the hybrid motor control inverter assembly rear.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A-1 (+FB) - A-2 (FGND)	Power switch on (IG), fan operation commanded by Active Test	10 to 12 V
   	Power switch on (IG), fan operation commanded by Active Test	0 to 1.5 V

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Rear Inverter Cooling Fan Connector)

   Result

   Proceed to
   OK
   NG

10. Turn the power switch off.
11. Disconnect the cable to the negative (-) auxiliary battery terminal.
12. Reconnect the A HV inverter cooling fan connector.
13. Install the deck board assembly.

Result: 

OK 

REPLACE HV INVERTER COOLING FAN. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ] 

Result: 

NG 

REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY REAR. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ]