Part 2

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0A08-264: DC / DC Converter Status Circuit
P0A08-264 - DC / DC Converter Status Circuit

15. CHECK COOLANT HOSE P0A01

NG -- CORRECT THE PROBLEM
OK -- Continue to next step.

16. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE ELECTRIC COOLING FAN) P0A01

NG -- CHECK COOLING FAN SYSTEM Cooling Fan Circuit
OK -- Continue to next step.

17. CHECK HV COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING)

(a) Connect the Techstream to the DLC3.

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

(c) Read the freeze frame data Ambient Temperature using the Techstream.

(d) Check if the freeze frame data Ambient Temperature is below freezing.

Result:

HINT
- HV coolant (SLLC) with a 30% concentration freezes at 5°F (-15 °C) and HV coolant (SLLC) with a 50% concentration freezes at -31°F (-35°C).
- If the HV coolant freezes in the HV radiator or HV water pump, the coolant temperature in the inverter with converter assembly rises because the HV coolant cannot circulate. As a result, a DTC may be set.
- A DTC is set when the water pump impeller cannot rotate due to freezing of the HV coolant.
- If a DTC is set due to freezing of HV coolant, the problem cannot be reproduced. Judge whether freezing of HV coolant occurred according to the freeze point of the HV coolant, HV coolant change history and ambient temperature when the DTC was set.
(e) Turn the power switch off.

B -- REPLACE HV COOLANT

A -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Components

18. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1)

CAUTION:
Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

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

(b) Remove the inverter terminal cover from the inverter with converter assembly.

Text in Illustration

(d) Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.

NOTICE:
Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

Standard Resistance:

Text in Illustration

(e) Connect the three-phase AC cables for MG1 to the inverter with converter assembly.

(f) Install the inverter terminal cover to the inverter with converter assembly.

NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Components
OK -- Continue to next step.

19. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2)

CAUTION:
Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

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

(b) Remove the inverter terminal cover from the inverter with converter assembly.

Text in Illustration

(d) Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.

NOTICE:
Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

Standard Resistance:

Text in Illustration

(e) Connect the three-phase AC cables for MG2 to the inverter with converter assembly.

(f) Install the inverter terminal cover to the inverter with converter assembly.

NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Components
OK -- Continue to next step.

20. CHECK REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY

CAUTION:
Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

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

(b) Remove the inverter terminal cover from the inverter with converter assembly.

Text in Illustration

(d) Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.

NOTICE:
Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

Standard Resistance:

Text in Illustration

(e) Connect the No. 3 wire frame to the inverter with converter assembly.

(f) Install the inverter terminal cover to the inverter with converter assembly.

NG -- CHECK NO.3 WIRE FRAME (REAR MOTOR CABLE)

OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Components

21. CHECK AMD TERMINAL (ENGINE ROOM JUNCTION BLOCK ASSEMBLY SIDE)

CAUTION:
Be sure to wear insulated gloves.

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Components

22. INSPECT POWER MANAGEMENT CONTROL ECU

(a) Disconnect all the connectors from the power management control ECU.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

(c) Connect the power management control ECU connectors.

NG -- REPLACE POWER MANAGEMENT CONTROL ECU Components

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR

23. REPLACE HV COOLANT P0A01

NEXT -- Continue to next step.

24. CHECK WATER PUMP WITH MOTOR ASSEMBLY P0A01

NG -- REPLACE WATER PUMP WITH MOTOR ASSEMBLY Components

OK -- COMPLETED

25. CHECK NO.3 WIRE FRAME (REAR MOTOR CABLE)

CAUTION:
Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

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

(b) Disconnect the No. 3 wire frame from the rear traction motor with transaxle assembly.

(d) Disconnect the No. 3 wire frame from the inverter with converter assembly.

Text in Illustration

(e) Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.

NOTICE:
Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

Standard Resistance:

Text in Illustration

(f) Connect the No. 3 wire frame to the rear traction motor with transaxle assembly.

(g) Connect the No. 3 wire frame to the inverter with converter assembly.

(h) Install the inverter terminal cover to the inverter with converter assembly.

NG -- REPLACE NO.3 WIRE FRAME Components
OK -- Continue to next step.

26. CHECK EXTENSION WIRE ASSEMBLY

(a) Remove the rear traction motor with transaxle assembly Components.

(b) Remove the extension wire assembly from the rear traction motor with transaxle assembly.

(c) Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.

NOTICE:
Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

Standard Resistance:

Text in Illustration

(d) Install the extension wire assembly to the rear traction motor with transaxle assembly.

(e) Install the rear traction motor with transaxle assembly.

NG -- REPLACE EXTENSION WIRE ASSEMBLY Components

OK -- REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY Components

27. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - IGCT NO. 2 FUSE)

CAUTION:
Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

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

(b) Disconnect the A79 connector from the inverter with converter assembly.

(c) Remove the IGCT No. 2 fuse from the engine room relay block No. 2.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

(e) Install the IGCT No. 2 fuse.

(f) Connect the inverter with converter assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

28. REPLACE INVERTER WITH CONVERTER ASSEMBLY

(a) Replace the inverter with converter assembly Components.

NEXT -- REPLACE FUSE (IGCT NO.2)

29. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - DCDC-S FUSE)

CAUTION:
Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

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

(b) Disconnect the A79 connector from the inverter with converter assembly.

(c) Remove the DCDC-S fuse from the fusible link block assembly.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

(e) Install the DCDC-S fuse.

(f) Connect the inverter with converter assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

30. REPLACE INVERTER WITH CONVERTER ASSEMBLY

(a) Replace the inverter with converter assembly Components.

NEXT -- REPLACE FUSE (DCDC-S)

31. REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT -- REPLACE FUSE (IGCT NO.2)

32. REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT -- REPLACE FUSE (DCDC-S)