DTC P0A08-264: DC / DC Converter Status Circuit: Procedure
- CHECK DTC OUTPUT (HV)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
- Check if DTCs are output.
Result
Result Proceed to DTC P0A08-264 only is output. A Any of the following DTCs are also output. B DTC No. Relevant Diagnosis P0A93-346 Inverter Cooling System Performance P0A94-547, 548, 549 DC / DC Converter Performance P0AA6-526, 613, 655 Hybrid Battery Voltage System Isolation Fault P0ADB-227 Hybrid Battery Positive Contactor Control Circuit Low P0ADF-229 Hybrid Battery Negative Contactor Control Circuit Low P0AE6-225 Hybrid Battery Precharge Contactor Control Circuit Low P0C73-776 Motor Electronics Coolant Pump "A" Control Performance P3004-131, 803 Power Cable Malfunction P314A-828 Inverter Coolant Pump Speed Signal - Turn the ignition switch off.
B → See step 33
A: Go to next step
- CHECK FUSE (IGCT NO. 2)
- Disconnect the cable from the negative auxiliary battery terminal.
- Remove the IGCT NO. 2 fuse from the engine room relay block No. 2.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition IGCT NO. 2 fuse terminals Always Below 1 Ω TEXT IN ILLUSTRATION*1 Engine Room Relay Block No. 2 *2 IGCT NO. 2 Fuse - Install the IGCT NO. 2 fuse.
NG → See step 27
OK: Go to next step
- CHECK FUSE (DCDC-S)
- Remove the DCDC-S fuse from the fusible link block assembly.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition DCDC-S fuse terminals Always Below 1 Ω TEXT IN ILLUSTRATION*1 DCDC-S fuse *2 Fusible Link Block Assembly - Install the DCDC-S fuse.
NG → See step 29
OK: Go to next step
- CHECK FUSIBLE LINK BLOCK ASSEMBLY (MAIN)
- Disconnect connector O57 from the fusible link block assembly.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Terminal A - Terminal B Always Below 1 Ω TEXT IN ILLUSTRATION*1 Fusible Link Block Assembly - Connect the fusible link block assembly connector.
NG → REPLACE FUSIBLE LINK BLOCK ASSEMBLY (MAIN)
OK: Go to next step
- CHECK FUSIBLE LINK BLOCK ASSEMBLY (DCDC, HV R/B NO. 1)
- Check the fusible links (DCDC and HV R/B NO. 1) in the engine room relay block assembly for improper installation and for open circuits.
OK
The fusible links are installed securely. There are no open circuits.
NG → REPLACE FUSIBLE LINK BLOCK ASSEMBLY (DCDC, HV R/B NO. 1)
OK: Go to next step
- Check the fusible links (DCDC and HV R/B NO. 1) in the engine room relay block assembly for improper installation and for open circuits.
- CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) See step 3
NG → CONNECT SECURELY
OK: Go to next step
- CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) See step 4
NG → CONNECT SECURELY
OK: Go to next step
- CHECK CABLE AND WIRE HARNESS WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Remove the inverter terminal cover from the inverter with converter assembly.
- Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
NOTE:
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
Tester Connection Switch Condition Specified Condition z28-3 (U) - Body ground and shield ground Ignition switch off 1 MΩ or higher z28-2 (V) - Body ground and shield ground Ignition switch off 1 MΩ or higher z28-1 (W) - Body ground and shield ground Ignition switch off 1 MΩ or higher z26-3 (U) - Body ground and shield ground Ignition switch off 1 MΩ or higher z26-2 (V) - Body ground and shield ground Ignition switch off 1 MΩ or higher z26-1 (W) - Body ground and shield ground Ignition switch off 1 MΩ or higher TEXT IN ILLUSTRATION*1 Three-phase AC Cable for MG1 *2 Three-phase AC Cable for MG2 HINT:
Perform this inspection while the three-phase AC cables for MG1 and for MG2 are connected.
- Install the inverter terminal cover to the inverter with converter assembly.
NG → See step 18
OK: Go to next step
- Check that the service plug grip is not installed.
- CHECK AMD TERMINAL WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Check that the nuts for the AMD terminals are tightened to the specified torque, the AMD terminals are connected securely, and there are no contact problems.
Torque: 8.35 N*m (85 kgf*cm,
Result
Result Proceed to There are no arc marks. The terminals are connected securely and there are no contact problems. A There are no arc marks. The terminals are not connected securely and there is a contact problem. B There are arc marks. - C
B → CONNECT SECURELY
C → REPLACE MALFUNCTIONING PARTS
A: Go to next step
- Check that the service plug grip is not installed.
- CHECK TERMINAL VOLTAGE (AMD TERMINAL) WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Connect the cable to the negative auxiliary battery terminal.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition AMD terminal (Inverter with converter assembly side) - Body ground Ignition switch off 11 to 14 V
NG → See step 21
OK: Go to next step
- Check that the service plug grip is not installed.
- CHECK HARNESS AND CONNECTOR WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Disconnect the A64 connector from the inverter with converter assembly.
- Turn the ignition switch to ON.
HINT:
Turning the ignition switch to ON with the service grip removed causes interlock switch system DTC P0A0D-350 to be output.
- Measure the voltage according to the value(s) in the table below.
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Standard Voltage
Tester Connection Switch Condition Specified Condition A64-25 (IGCT) - Body ground Ignition switch ON 11 to 14 V A64-36 (S) - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to Inverter with Converter Assembly) - Turn the ignition switch off.
- Connect the inverter with converter assembly connector.
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- Check that the service plug grip is not installed.
- CHECK HYBRID VEHICLE CONTROL ECU
- Disconnect the A64 connector from the inverter with converter assembly.
- Measure the resistance according to the value(s) in the table below.
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Standard Resistance
Tester Connection Switch Condition Specified Condition A64-24 (NODD) - Body ground Ignition switch off 120 to 140 kΩ TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to Inverter with Converter Assembly) - Connect the inverter with converter assembly connector.
NG → See step 22
OK: Go to next step
- CHECK DC/DC CONVERTER FUNCTION
HINT:
The current at the AMD terminal cannot be measured directly because of space limitations. Measure the current flowing from the auxiliary battery instead.
- Connect a AC/DC 400 A probe to the positive auxiliary battery line.
- Install the service plug grip.
- Turn the ignition switch to ON (READY) and leave the vehicle as it is until the electric current flowing into the auxiliary battery becomes 10 A or less.
- Measure the current flowing from the auxiliary battery with the ignition switch ON (READY), the headlight position switch and blower motor switch in the HI position, and the rear window defogger turned on.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard Current
Item Switch Condition Specified Condition Current flowing from auxiliary battery Ignition switch ON (READY)
(The headlight position switch and blower motor switch are in the HI position, and the rear window defogger is turned on.)0 A or less (no current from auxiliary battery) - Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition Auxiliary battery voltage Ignition switch ON (READY)
(The headlight position switch and blower motor switch are in the HI position, and the rear window defogger is turned on.)13 to 15 V - Turn the ignition switch off.
NG → See step 34
OK: Go to next step
- CHECK QUANTITY OF HV COOLANT See step 3
B → See step 35
C → See step 36
A: Go to next step
- CHECK COOLANT HOSE See step 4
NG → CORRECT THE PROBLEM
OK: Go to next step
- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE ELECTRIC COOLING FAN) See step 5
NG → See step 37
OK: Go to next step
- CHECK HV COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Read the freeze frame data item Ambient Temperature using the Techstream.
- Check if the freeze frame data item ambient Temperature is below freezing.
Result
Result Proceed to Ambient Temperature value is above freezing temperature of HV coolant. A Ambient Temperature value is below freezing temperature of HV coolant. B 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 inverter water pump assembly (w/ motor), 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 inverter water pump assembly (w/ motor) 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.
- Turn the ignition switch off.
B → See step 23
A → See step 34
- CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1) WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Remove the inverter terminal cover from the inverter with converter assembly.
- Disconnect the three-phase AC cables for MG1 from the inverter with converter assembly.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*1 Three-phase AC Cables for MG1 - Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
NOTE:
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
Tester Connection Switch Condition Specified Condition z28-3 (U) - Body ground and shield ground Ignition switch off 100 MΩ or higher z28-2 (V) - Body ground and shield ground Ignition switch off 100 MΩ or higher z28-1 (W) - Body ground and shield ground Ignition switch off 100 MΩ or higher TEXT IN ILLUSTRATION*1 Three-phase AC Cables for MG1 *a Shield Ground - Connect the three-phase AC cables for MG1 to the inverter with converter assembly.
- Install the inverter terminal cover to the inverter with converter assembly.
NG → See step 38
OK: Go to next step
- Check that the service plug grip is not installed.
- CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2) WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Remove the inverter terminal cover from the inverter with converter assembly.
- Disconnect the three-phase AC cables for MG2 from the inverter with converter assembly.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*1 Three-phase AC Cables for MG2 - Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
NOTE:
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
Tester Connection Switch Condition Specified Condition z26-3 (U) - Body ground and shield ground Ignition switch off 100 MΩ or higher z26-2 (V) - Body ground and shield ground Ignition switch off 100 MΩ or higher z26-1 (W) - Body ground and shield ground Ignition switch off 100 MΩ or higher TEXT IN ILLUSTRATION*1 Three-phase AC Cables for MG2 *a Shield Ground - Connect the three-phase AC cables for MG2 to the inverter with converter assembly.
- Install the inverter terminal cover to the inverter with converter assembly.
NG → See step 38
OK: Go to next step
- Check that the service plug grip is not installed.
- CHECK REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Remove the inverter terminal cover from the inverter with converter assembly.
- Disconnect the No. 3 wire frame from the inverter with converter assembly.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*1 Three-phase AC Cable for MGR - Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
NOTE:
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
Tester Connection Switch Condition Specified Condition j9-3 (R-U) - Body ground and shield ground Ignition switch off 10 MΩ or higher j9-2 (R-V) - Body ground and shield ground Ignition switch off 10 MΩ or higher j9-1 (R-W) - Body ground and shield ground Ignition switch off 10 MΩ or higher TEXT IN ILLUSTRATION*1 Three-phase AC Cable for MGR *a Shield Ground - Connect the No. 3 wire frame to the inverter with converter assembly.
- Install the inverter terminal cover to the inverter with converter assembly.
NG → See step 25
OK → See step 34
- Check that the service plug grip is not installed.
- CHECK AMD TERMINAL (ENGINE ROOM JUNCTION BLOCK ASSEMBLY SIDE) WARNING:
Be sure to wear insulated gloves.
- Measure the voltage according to the value(s) in the table below.
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Standard Voltage
Tester Connection Switch Condition Specified Condition AMD terminal (Engine room junction block assembly side) - Body ground Ignition switch off 11 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 34
- Measure the voltage according to the value(s) in the table below.
- INSPECT HYBRID VEHICLE CONTROL ECU
- Disconnect all the connectors from the hybrid vehicle control ECU.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Switch Condition Specified Condition A65-21 (NODD) - D72-6 (E1) Ignition switch off 120 to 140 kΩ TEXT IN ILLUSTRATION*a Component without harness connected
(Hybrid Vehicle Control ECU) - Connect the hybrid vehicle control ECU connectors.
NG → See step 39
OK → REPAIR OR REPLACE HARNESS OR CONNECTOR
- REPLACE HV COOLANT See step 7
NEXT: Go to next step
- CHECK INVERTER WATER PUMP ASSEMBLY (W/ MOTOR) See step 8
NG → See step 40
OK → COMPLETED
- CHECK NO. 3 WIRE FRAME (REAR MOTOR CABLE) WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Disconnect the No. 3 wire frame from the rear traction motor with transaxle assembly.
- Remove the inverter terminal cover from the inverter with converter assembly.
- Disconnect the No. 3 wire frame from the inverter with converter assembly.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*1 Three-phase AC Cable for MGR - Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
NOTE:
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
Tester Connection Switch Condition Specified Condition j9-3 (R-U) - Body ground and shield ground Ignition switch off 10 MΩ or higher j9-2 (R-V) - Body ground and shield ground Ignition switch off 10 MΩ or higher j9-1 (R-W) - Body ground and shield ground Ignition switch off 10 MΩ or higher TEXT IN ILLUSTRATION*1 Three-phase AC Cable for MGR *a Shield Ground - Connect the No. 3 wire frame to the rear traction motor with transaxle assembly.
- Connect the No. 3 wire frame to the inverter with converter assembly.
- Install the inverter terminal cover to the inverter with converter assembly.
NG → See step 41
OK: Go to next step
- Check that the service plug grip is not installed.
- CHECK EXTENSION WIRE ASSEMBLY
- Remove the rear traction motor with transaxle assembly. Refer to REMOVAL .
- Remove the extension wire assembly from the rear traction motor with transaxle assembly.
- Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
NOTE:
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
Tester Connection Switch Condition Specified Condition R-U - Shield shell Ignition switch off 100 MΩ or higher R-V - Shield shell Ignition switch off 100 MΩ or higher R-W - Shield shell Ignition switch off 100 MΩ or higher TEXT IN ILLUSTRATION*1 Extension Wire Assembly *a Shield Shell - Install the extension wire assembly to the rear traction motor with transaxle assembly.
- Install the rear traction motor with transaxle assembly.
NG → See step 42
OK → See step 43
- CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - IGCT NO. 2 FUSE) WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Disconnect the A64 connector from the inverter with converter assembly.
- Remove the IGCT NO. 2 fuse from the engine room relay block No. 2.
- Measure the resistance according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard Resistance
Tester Connection Switch Condition Specified Condition A64-25 (IGCT) or 2 (IGCT NO. 2 fuse) - Body ground and other terminals Ignition switch off 10 kΩ or higher TEXT IN ILLUSTRATION*1 Engine Room Relay Block No. 2 *2 IGCT NO. 2 Fuse *a Front view of wire harness connector
(to Inverter with Converter Assembly) - Install the IGCT NO. 2 fuse.
- Connect the inverter with converter assembly connector.
NG → See step 31
OK: Go to next step
- Check that the service plug grip is not installed.
- REPLACE INVERTER WITH CONVERTER ASSEMBLY
- Replace the inverter with converter assembly. Refer to REMOVAL .
NEXT → REPLACE FUSE (IGCT NO. 2)
- CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - DCDC-S FUSE) WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Disconnect the A64 connector from the inverter with converter assembly.
- Disconnect the O57 connector from the fusible link block assembly.
- Measure the resistance according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard Resistance
Tester Connection Switch Condition Specified Condition A64-36 (S) or O57-1 - Body ground and other terminals Ignition switch off 10 kΩ or higher TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to Inverter with Converter Assembly)*b Front view of wire harness connector
(to Fusible Link Block Assembly) - Connect the fusible link block assembly connector.
- Connect the inverter with converter assembly connector.
NG → See step 32
OK: Go to next step
- Check that the service plug grip is not installed.
- REPLACE INVERTER WITH CONVERTER ASSEMBLY
- Replace the inverter with converter assembly. Refer to REMOVAL .
NEXT → REPLACE FUSE (DCDC-S)
- REPAIR OR REPLACE HARNESS OR CONNECTOR
NEXT → REPLACE FUSE (IGCT NO. 2)
- REPAIR OR REPLACE HARNESS OR CONNECTOR
NEXT → REPLACE FUSE (DCDC-S)
- GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART
- REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to REMOVAL
- ADD HV COOLANT. Refer to REPLACEMENT - Step 3
- INSPECT FOR COOLANT LEAK AND ADD COOLANT. Refer to REPLACEMENT - Step 4
- CHECK COOLING FAN SYSTEM. Refer to Cooling Fan Circuit
- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to REMOVAL
- REPLACE HYBRID VEHICLE CONTROL ECU. Refer to REMOVAL
- REPLACE INVERTER WATER PUMP ASSEMBLY (W/ MOTOR). Refer to REMOVAL
- REPLACE NO. 3 WIRE FRAME. Refer to REMOVAL
- REPLACE EXTENSION WIRE ASSEMBLY. Refer to REMOVAL
- REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY. Refer to REMOVAL