DESCRIPTION
For a description of the inverter, Click here.
If the motor inverter overheats, has a circuit malfunction, or has an internal short, the inverter transmits this information to the MG ECU via the motor inverter fail signal line.
DTC No. | INF Code | DTC Detection Condition | Trouble Area |
---|---|---|---|
P0A78 | 284 | Motor inverter fail signal detection (overheat) |
|
WIRING DIAGRAM
Refer to the wiring diagram for DTC P0A1A-200 Click here.
Refer to the wiring diagram for DTC P324E-788 Click here.
Refer to the wiring diagram for DTC U0110-159 Click here.
INSPECTION PROCEDURE
CAUTION:
Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
Note
After troubleshooting and repairing all output DTCs, be sure to replace the inverter with converter assembly.
Tech Tips
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
PROCEDURE
CHECK DTC OUTPUT (HV)
Connect the intelligent tester to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Check if DTCs are output.
Result | ||||||
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|
Note
If P0A78-202 is output, troubleshoot it first. After completing the troubleshooting for P0A78-202, return to perform troubleshooting for this DTC.
Parts repaired or replaced during troubleshooting for P0A78-202 do not need to be re-inspected in this diagnosis procedure.
Turn the power switch off.
B |
GO TO DTC CHART Click here |
A |
CHECK DTC OUTPUT (HV)
Connect the intelligent tester to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Check if DTCs are output.
Tech Tips
If P0A78-202 was not output in step 1 of this diagnosis procedure, check Table 1 below.
If P0A78-202 was output in step 1 of this diagnosis procedure, repair that DTC first, then check Table 2 below.
Result | ||||||
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DTC No. | Relevant Diagnosis |
---|---|
P0A1A (all INF codes)*1 | Generator Control Module |
P0A1B (all INF codes)*1 | Drive Motor "A" Control Module |
P0A1C (all INF codes)*1 | Drive Motor "B" Control Module |
P0A1D (all INF codes)*1 | Hybrid Powertrain Control Module |
P0A3F-243 | Drive Motor "A" Position Sensor Circuit |
P0A40-500 | Drive Motor "A" Position Sensor Circuit Range/Performance |
P0A41-245 | Drive Motor "A" Position Sensor Circuit Low |
P0A45-669 | Drive Motor "B" Position Sensor Circuit |
P0A46-671 | Drive Motor "B" Position Sensor Circuit Range/Performance |
P0A47-670 | Drive Motor "B" Position Sensor Circuit Low |
P0A4B-253 | Generator Position Sensor Circuit |
P0A4C-513 | Generator Position Sensor Circuit Range/Performance |
P0A4D-255 | Generator Position Sensor Circuit Low |
P0A60 (all INF codes)*1 | Drive Motor "A" Phase V Current |
P0A63 (all INF codes)*1 | Drive Motor "A" Phase W Current |
P0A69 (all INF codes)*1 | Drive Motor "B" Phase V Current |
P0A6C (all INF codes)*1 | Drive Motor "B" Phase W Current |
P0A72 (all INF codes)*1 | Generator Phase V Current |
P0A75 (all INF codes)*1 | Generator Phase W Current |
P0A78-118, 119, 120, 266, 267, 279, 287, 306, 503, 504, 505, 506, 586, 806, 807, 808 | Drive Motor "A" Inverter Performance |
P0A79-693, 694, 695, 704, 812, 813, 814 | Drive Motor "B" Inverter Performance |
P0A7A-325, 344, 517, 518, 809, 810, 811 | Generator Inverter Performance |
P0A90-509 | Drive Motor "A" Performance |
P0A91-702 | Drive Motor "B" Performance |
P0A92-521 | Hybrid Generator Performance |
P0A94-124, 125, 126, 169, 170, 171, 442, 547, 548, 549, 554, 555, 556, 585, 587, 589, 590 | DC/DC Converter Performance |
P0C73-776 | Motor Electronics Coolant Pump "A" Control Performance |
P0C76-523 | Hybrid Battery System Discharge Time Too Long |
P314A-828 | Inverter Coolant Pump Speed Signal |
DTC No. | Relevant Diagnosis |
---|---|
P0A1A (all INF codes)*1 | Generator Control Module |
P0A1B (all INF codes)*1 | Drive Motor "A" Control Module |
P0A1C (all INF codes)*1 | Drive Motor "A" Control Module |
P0A1D (all INF codes)*1 | Hybrid Powertrain Control Module |
P0A3F-243 | Drive Motor "A" Position Sensor Circuit |
P0A40-500 | Drive Motor "A" Position Sensor Circuit Range/Performance |
P0A41-245 | Drive Motor "A" Position Sensor Circuit Low |
P0A45-669 | Drive Motor "B" Position Sensor Circuit |
P0A46-671 | Drive Motor "B" Position Sensor Circuit Range/Performance |
P0A47-670 | Drive Motor "B" Position Sensor Circuit Low |
P0A4B-253 | Generator Position Sensor Circuit |
P0A4C-513 | Generator Position Sensor Circuit Range/Performance |
P0A4D-255 | Generator Position Sensor Circuit Low |
P0A60-294 | Drive Motor "A" Phase V Current |
P0A63-302 | Drive Motor "A" Phase W Current |
P0A69 (all INF codes)*1 | Drive Motor "B" Phase V Current |
P0A6C (all INF codes)*1 | Drive Motor "B" Phase W Current |
P0A72 (all INF codes)*1 | Generator Phase V Current |
P0A75 (all INF codes)*1 | Generator Phase W Current |
P0A78-118, 119, 120, 266, 267, 279, 287, 503, 504, 505, 506, 586, 806, 807, 808 | Drive Motor "A" Inverter Performance |
P0A79-693, 694, 695, 704, 812, 813, 814 | Drive Motor "B" Inverter Performance |
P0A7A-325, 344, 517, 518, 809, 810, 811 | Generator Inverter Performance |
P0A91-702 | Drive Motor "B" Performance |
P0A92-521 | Hybrid Generator Performance |
P0A94-124, 125, 126, 169, 170, 171, 442, 547, 548, 549, 554, 555, 556, 585, 587, 589, 590 | DC/DC Converter Performance |
P0C73-776 | Motor Electronics Coolant Pump "A" Control Performance |
P0C76-523 | Hybrid Battery System Discharge Time Too Long |
P314A-828 | Inverter Coolant Pump Speed Signal |
Tech Tips
*1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
P0A78-284 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. After troubleshooting and repairing all output DTCs, be sure to replace the inverter with converter assembly.
Turn the power switch off.
B |
GO TO DTC CHART Click here |
A |
CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)
CAUTION:
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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Note
Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.
Check the connection of the low voltage connector of the inverter with converter assembly.
OK |
---|
The connector is connected securely and there are no contact problems. |
Tech Tips
When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.
NG |
CONNECT SECURELY |
OK |
CHECK QUANTITY OF HV COOLANT
Check the coolant level in the inverter reserve tank.
Check for coolant leaks.
Result | Proceed to |
---|---|
Coolant leaks are not evident. A sufficient amount of coolant remains in the inverter reserve tank. | A |
Coolant leaks are not evident. No coolant remains in the inverter reserve tank. | B |
Coolant leaks are evident. | C |
Tech Tips
After repairing the coolant leaks and adding coolant, perform the "Activate the Water Pump" Active Test (HV Active Test item) and the "Control the Electric Cooling Fan" Active Test (Engine Active Test item) and make sure that there are no malfunctions.
B |
ADD COOLANT |
C |
INSPECT FOR COOLANT LEAKS AND ADD COOLANT |
A |
CHECK COOLANT HOSE
Check if the hoses of the cooling system are kinked or clogged.
NG |
CORRECT THE PROBLEM |
OK |
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE ELECTRIC COOLING FAN)
Connect the intelligent tester to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Electric Cooling Fan.
Perform the "Control the Electric Cooling Fan" Active Test.
OK |
---|
The cooling fan rotates. |
Turn the power switch off.
NG |
CHECK COOLING FAN SYSTEM Click here |
OK |
CHECK COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING)
Connect the intelligent tester to the DLC3.
Turn the power switch on (IG).
Read the freeze frame data Ambient Temperature using the intelligent tester.
Check if the freeze frame data Ambient Temperature is below freezing.
Result | ||||||
---|---|---|---|---|---|---|
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Tech Tips
HV coolant (SLLC) with a 30% concentration freezes at -15 °C (5°F) and HV coolant (SLLC) with a 50% concentration freezes at -35°C (-31°F).
If the HV coolant freezes in the HV radiator or inverter water pump assemblyp, 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 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 power switch off.
B |
A |
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER)
CAUTION:
Be sure to wear insulated gloves.
Disconnect the low voltage connector D44 from the inverter with converter assembly.
Turn the power switch on (IG).
*1 | Front view of wire harness connector (to Inverter with Converter Assembly) |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Note
Turning the power switch on (IG) with the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
Turn the power switch off.
Connect the low voltage connector from the inverter with converter assembly.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK GENERATOR RESOLVER
Disconnect the low voltage connector D44 from the inverter with converter assembly.
*1 | Front view of wire harness connector (to Inverter with Converter Assembly) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open) | ||||||||||||
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Standard Resistance (Check for Short) | ||||||||||||
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|
Connect the inverter with converter assembly connector.
NG |
OK |
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER)
CAUTION:
Be sure to wear insulated gloves.
Disconnect the low voltage connector D44 from the inverter with converter assembly.
Turn the power switch on (IG).
*1 | Front view of wire harness connector (to Inverter with Converter Assembly) |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Note
Turning the power switch on (IG) with the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
Turn the power switch off.
Connect the inverter with converter assembly connector.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK MOTOR RESOLVER
Disconnect the low voltage connector D44 from the inverter with converter assembly.
*1 | Front view of wire harness connector (to Inverter with Converter Assembly) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
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Standard Resistance (Check for Short) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Connect the inverter with converter assembly connector.
NG |
OK |
CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION)
CAUTION:
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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Remove the inverter terminal cover from the inverter with converter assembly.
Check that the bolts for the generator cable are tightened to the specified torque, the generator cable is connected securely, and there are no contact problems.
Specified Condition |
---|
T=8.0 N*m {82 kgf*cm, 71 in.*lbf} |
Note
Make sure that the tightening torque of the bolts is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).
Check for arc marks at the bolts for the generator cable.
Result | |||||||||||||||
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|
Install the inverter terminal cover.
B |
REPLACE MALFUNCTIONING PARTS |
C |
CONNECT SECURELY |
A |
CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)
CAUTION:
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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Remove the inverter terminal cover from the inverter with converter assembly.
Check that the bolts for the motor cable are tightened to the specified torque, the motor cable is connected securely, and there are no contact problems.
Specified Condition |
---|
T=8.0 N*m {82 kgf*cm, 71 in.*lbf} |
Note
Make sure that the tightening torque of the bolts is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).
Check for arc marks at the bolts for the motor cable.
Result | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Install the inverter terminal cover.
B |
REPLACE MALFUNCTIONING PARTS |
C |
CONNECT SECURELY |
A |
CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1)
CAUTION:
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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Remove the inverter terminal cover from the inverter with converter assembly.
Disconnect the generator cable and motor cable from the inverter with converter assembly.
*1 | Generator Cable |
*2 | Shield Ground |
Check MG1 for an interphase short using a milliohmmeter.
Using a milliohmmeter, measure the resistance according to the value(s) in the table below.
Tech Tips
If the MG1 temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
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Tech Tips
To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68° F).
R20 = Rt / {1 + 0.00393 X (T - 20)}
The calculation is based on the following:
R20: Resistance at 20°C (68° F) (mΩ)
Rt: Measured resistance (mΩ)
T: Temperature when the resistance is measured (° C)
Using a megohmmeter set to 500 V, measure the 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 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Connect the generator cable and motor cable.
Install the inverter terminal cover.
NG |
REPLACE HYBRID VEHICLE GENERATOR ASSEMBLY Click here |
OK |
CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2)
CAUTION:
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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Remove the inverter terminal cover from the inverter with converter assembly.
Disconnect the generator cable and motor cable from the inverter with converter assembly.
*1 | Motor Cable |
*2 | Shield Ground |
Check MG2 for an interphase short using a milliohmmeter.
Using a milliohmmeter, measure the resistance according to the value(s) in the table below.
Tech Tips
If the MG2 temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Tech Tips
To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68° F).
R20 = Rt / {1 + 0.00393 X (T - 20)}
The calculation is based on the following:
R20: Resistance at 20°C (68° F) (mΩ)
Rt: Measured resistance (mΩ)
T: Temperature when the resistance is measured (° C)
Using a megohmmeter set to 500 V, measure the 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 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Connect the generator cable and motor cable.
Install the inverter terminal cover.
NG |
REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here |
OK |
CHECK FUSE (PCU)
*1 | Engine Room Relay Block No. 2 |
*2 | PCU fuse |
Remove the PCU fuse from the engine room relay block No. 2.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Install the PCU fuse.
NG |
OK |
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY POWER SOURCE CIRCUIT)
CAUTION:
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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Disconnect connector A79 from inverter with converter assembly.
*1 | Front view of wire harness connector (to Inverter with Converter Assembly) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch off.
Connect the inverter with converter assembly connector.
NG |
REPAIR OR REPLACE POWER SOURCE CIRCUIT |
OK |
CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INVERTER WITH CONVERTER)
CAUTION:
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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Turn the power switch off.
Disconnect connector A79 from the inverter with converter assembly.
Disconnect connector A81 from the power management control ECU.
*1 | Front view of wire harness connector (to Inverter with Converter Assembly) |
*2 | Front view of wire harness connector (to Power Management Control ECU) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open) | |||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Standard Resistance (Check for short) | |||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Turn the power switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Note
Turning the power switch on (IG) with the power management control ECU and inverter with converter assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
Turn the power switch off.
Connect the power management control ECU connector.
Connect the inverter with converter assembly connector.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK POWER MANAGEMENT CONTROL ECU
Disconnect connector A81 from the power management control ECU.
*1 | Component without harness connected (Power Management Control ECU) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
Connect the power management control ECU connector.
B |
REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here |
C |
REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here |
A |
CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)
Check the connection of the generator resolver connector.
OK |
---|
The connector is connected securely and there are no contact problems. |
NG |
CONNECT SECURELY |
OK |
CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)
Check the connection of the motor resolver connector.
OK |
---|
The connector is connected securely and there are no contact problems. |
NG |
CONNECT SECURELY |
OK |
REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here
CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)
Check the connection of the generator resolver connector.
OK |
---|
The connector is connected securely and there are no contact problems. |
NG |
CONNECT SECURELY |
OK |
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER)
Disconnect the low voltage connector D44 from the inverter with converter assembly.
*1 | Front view of wire harness connector (to Generator Resolver) |
*2 | Front view of wire harness connector (to Inverter with Converter Assembly) |
Disconnect the generator resolver connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open) | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Standard Resistance (Check for Short) | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Tech Tips
The generator resolver is not available separately. If it requires replacement, replace the hybrid vehicle transaxle assembly.
Connect the generator resolver connector.
Connect the inverter with converter assembly connector.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
REPLACE HYBRID VEHICLE GENERATOR ASSEMBLY Click here
CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)
Check the connection of the motor resolver connector.
OK |
---|
The connector is connected securely and there are no contact problems. |
NG |
CONNECT SECURELY |
OK |
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER)
Disconnect the low voltage connector D44 from the inverter with converter assembly.
*1 | Front view of wire harness connector (to Motor Resolver) |
*2 | Front view of wire harness connector (to Inverter with Converter Assembly) |
Disconnect the motor resolver connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open) | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Standard Resistance (Check for Short) | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Tech Tips
The motor resolver is not available separately. If it requires replacement, replace the hybrid vehicle transaxle assembly.
Connect the motor resolver connector.
Connect the inverter with converter assembly connector.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - PCU FUSE)
CAUTION:
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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Disconnect connector A79 from the inverter with converter assembly.
*1 | Front view of wire harness connector (to Inverter with Converter Assembly) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Connect the inverter with converter assembly connector.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR Click here |
OK |
REPLACE INVERTER WITH CONVERTER ASSEMBLY
Replace the inverter with converter assembly Click here.
NEXT |
REPLACE FUSE (PCU)
REPAIR OR REPLACE HARNESS OR CONNECTOR
Repair or replace the harness or connector.
NEXT |
REPLACE FUSE (PCU)
REPLACE HV COOLANT
Replace the HV coolant with coolant having an appropriate concentration (appropriate freeze point) for the vehicle usage conditions Click here.
NEXT |
CHECK INVERTER WATER PUMP ASSEMBLY
Perform a road test and check that DTCs are not stored.
OK |
---|
DTCs are not stored. |
NG |
REPLACE INVERTER WATER PUMP ASSEMBLY Click here |
OK |
COMPLETED