DTC P0A78-121: Drive Motor "A" Inverter Performance: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   P0A78-121 is set before any of the DTCs in the table below are set.	A
   Any of the DTCs in the table below are set before P0A78-121 is set.	B

   DTC No.	Relevant Diagnosis
   P3011-123, P3012-123, P3013-123, P0314-123, P3015-123, P3016-123, P0317-123, P3018-123, P3019-123, P3020-123, P3021-123, P3022-123, P3023-123, P3024-123, P3025-123	Battery Block # Becomes Weak
   P0AFC-123	Hybrid Battery Pack Sensor Module
   P308A-123	Hybrid Battery Voltage Sensor All Circuits Low
   P0AC0-123	Hybrid Battery Pack Current Sensor Circuit Range/Performance
   P0AC1-123	Hybrid Battery Pack Current Sensor Circuit Low
   P0AC2-123	Hybrid Battery Pack Current Sensor Circuit High
   P0A9C-123	Hybrid Battery Temperature Sensor "A"
   P0A9D-123	Hybrid Battery Temperature Sensor "A" Circuit Low
   P0A9E-123	Hybrid Battery Temperature Sensor "A" Circuit High
   P0C6E-123	Hybrid Battery Temperature Sensor "A" / "B" Correlation
   P0AC6-123	Hybrid Battery Temperature Sensor "B" Range/Performance
   P0AC7-123	Hybrid Battery Temperature Sensor "B" Circuit Low
   P0AC8-123	Hybrid Battery Temperature Sensor "B" Circuit High
   P0ACB-123	Hybrid Battery Pack Cooling Fan 3 Performance or Stuck OFF
   P0ACC-123	Hybrid Battery Pack Cooling Fan 3 Stuck ON
   P0ACD-123	Hybrid Battery Pack Cooling Fan 3 Control Circuit Low
   P0C70-123	Hybrid Battery Temperature Sensor "C" / "D" Correlation
   P0AE9-123	Hybrid Battery Temperature Sensor "D" Range/Performance
   P0AEA-123	Hybrid Battery Temperature Sensor "D" Circuit Low
   P0AEB-123	Hybrid Battery Temperature Sensor "D" Circuit High
   P0BC3-123	Hybrid Battery Temperature Sensor "E" Range/Performance
   P0BC4-123	Hybrid Battery Temperature Sensor "E" Circuit Low
   P0BC5-123	Hybrid Battery Temperature Sensor "E" Circuit High
   P0C72-123	Hybrid Battery Temperature Sensor "E" / "F" Correlation
   P0C34-123	Hybrid Battery Temperature Sensor "F" Range/Performance
   P0C35-123	Hybrid Battery Temperature Sensor "F" Circuit Low
   P0C36-123	Hybrid Battery Temperature Sensor "F" Circuit High
   P0A78-282	Drive Motor "A" Inverter Performance
   P0A94-127, 550, 564	DC/DC Converter Performance
   P0C30-390	Hybrid Battery Pack State of Charge High

   HINT: 

   • Refer to the Freeze Frame Data to determine the order in which the DTCs were set.
   • P0A78-121 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. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
5. Turn the ignition switch off.

B → See step   47 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   P0A78-121 only is output.	A
   Any of the following DTCs are also output.	B

   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
   P0A78-113, 118, 119, 120, 128, 266, 267, 279, 284, 286, 287, 306, 503, 504, 505, 506, 586, 806, 807, 808	Drive Motor "A" Inverter Performance
   P0A79-136, 692, 693, 694, 695, 696, 704, 712, 812, 813, 814	Drive Motor "B" Inverter Performance
   P0A7A-122, 130, 322, 324, 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
   P0A93-346	Inverter Cooling System Performance
   P0A94-124, 125, 126, 169, 170, 171, 172, 442, 547, 548, 549, 553, 554, 555, 556, 557, 585, 587, 589, 590	DC/DC Converter Performance
   P0ADB-227	Hybrid Battery Positive Contactor Control Circuit Low
   P0ADC-226	Hybrid Battery Positive Contactor Control Circuit High
   P0ADF-229	Hybrid Battery Negative Contactor Control Circuit Low
   P0AE0-228	Hybrid Battery Negative Contactor Control Circuit High
   P0C73-776	Motor Electronics Coolant Pump "A" Control Performance
   P0C76-523	Hybrid Battery System Discharge Time Too Long
   P3004-803	High Voltage Power Resource
   P314A-828	Inverter Coolant Pump Speed Signal

   HINT: 

   • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
   • P0A78-121 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. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
5. Turn the ignition switch off.

B → See step   48 

A: Go to next step 

NG → CONNECT SECURELY 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → See step   31 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → See step   34 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → See step   37 

OK: Go to next step 

B → REPLACE MALFUNCTIONING PARTS 

C → CONNECT SECURELY 

A: Go to next step 

B → REPLACE MALFUNCTIONING PARTS 

C → CONNECT SECURELY 

A: Go to next step 

1. 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.

2. Remove the inverter terminal cover from the inverter with converter assembly.
   Fig 1: Identifying Inverter Terminal Cover, The Inverter With Converter Assembly & Bolts

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that the bolts for the rear motor cable are tightened to the specified torque, the rear motor cable is connected securely, and there are no contact problems.
   Fig 2: Identifying Rear Motor Cable & Fasteners

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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).

4. Check for arc marks at the bolts for the rear motor cable.

   Result

   Result		Proceed to
   The terminals are connected securely and there are no contact problems.	There are no arc marks.	A
   The terminals are not connected securely and there is a contact problem.	There are arc marks.	B
   The terminals are not connected securely and there is a contact problem.	There are no arc marks.	C
   The terminals are connected securely and there are no contact problems.	There are arc marks.	B

5. Install the inverter terminal cover.

B → REPLACE MALFUNCTIONING PARTS 

C → CONNECT SECURELY 

A: Go to next step 

NG → See step   49 

OK: Go to next step 

NG → See step   50 

OK: Go to next step 

1. 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.

2. Remove the inverter terminal cover from the inverter with converter assembly.
   Fig 3: Identifying Inverter Terminal Cover, The Inverter With Converter Assembly & Bolts

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the rear motor cable from the inverter with converter assembly.
   Fig 4: Identifying Rear Motor Cable & Fasteners

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check MGR for an interphase short using a milliohmmeter.
   Fig 5: Identifying Three-Phase AC Cables for MGR

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

      HINT: 

      If the MGR 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

      Tester Connection	Switch Condition	Specified Condition
      j9-3 (R-U) - j9-2 (R-V)	Ignition switch off	163 to 176 mΩ
      j9-2 (R-V) - j9-1 (R-W)	Ignition switch off	163 to 176 mΩ
      j9-1 (R-W) - j9-3 (R-U)	Ignition switch off	163 to 176 mΩ

      TEXT IN ILLUSTRATION
      
      

      *1	Three-phase AC Cable for MGR
      *a	Shielded Ground

      HINT: 

      To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 68° F (20°C).

      • R20 = Rt / {1 + 0.00393 X (T - 20)}

      The calculation is based on the following:

      • R20: Resistance at 68° F (20°C) (mΩ)
      • Rt: Measured resistance (mΩ)
      • T: Temperature when the resistance is measured (° C)
5. 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

   Tester Connection	Switch Condition	Specified Condition
   j9-3 (R-U) - Body ground and shielded ground	Ignition switch off	100 MΩ or higher
   j9-2 (R-V) - Body ground and shielded ground	Ignition switch off	100 MΩ or higher
   j9-1 (R-W) - Body ground and shielded ground	Ignition switch off	100 MΩ or higher

6. Connect the rear motor cable.
7. Install the inverter terminal cover.

NG → See step   40 

OK: Go to next step 

1. 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.

2. Remove the inverter terminal cover from the inverter with converter assembly.
   Fig 6: Identifying Inverter Terminal Cover, The Inverter With Converter Assembly & Bolts

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that the bolts for the No. 3 wire frame are tightened to the specified torque, the No. 3 wire frame is connected securely, and there are no contact problems.
   Fig 7: Identifying No. 3 Wire Frame & Fasteners

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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).

4. Check for arc marks at the bolts for the No. 3 wire frame.

   Result

   Result		Proceed to
   The terminals are connected securely and there are no contact problems.	There are no arc marks.	A
   The terminals are not connected securely and there is a contact problem.	There are arc marks.	B
   The terminals are not connected securely and there is a contact problem.	There are no arc marks.	C
   The terminals are connected securely and there are no contact problems.	There are arc marks.	B

5. Install the inverter terminal cover.

B → REPLACE MALFUNCTIONING PARTS 

C → CONNECT SECURELY 

A: Go to next step 

1. Visually check the connection of the service plug grip to the HV battery. Remove the service plug grip and check for contamination.

   OK

   Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.

NG → See step   51 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 8: Identifying Service Plug Grip

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Service plug grip terminals	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Service plug grip

NG → See step   52 

OK: Go to next step 

1. Remove the electric vehicle fuse. Refer to REMOVAL .
2. Measure the resistance according to the value(s) in the table below.
   Fig 9: Identifying Electric Vehicle Fuse

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Electric vehicle fuse	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Electric Vehicle Fuse

3. Install the electric vehicle fuse.

NG → See step   53 

OK: Go to next step 

1. 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.

2. Disconnect the No. 3 wire frame from the hybrid battery junction block assembly.
   Fig 10: Identifying No. 3 Wire Frame & The Hybrid Battery Junction Block Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove the inverter terminal cover from the inverter with converter assembly.
   Fig 11: Identifying Inverter Terminal Cover, The Inverter With Converter Assembly & Bolts

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Disconnect the No. 3 wire frame from the inverter with converter assembly.
   Fig 12: Identifying No. 3 Wire Frame & Fasteners

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Measure the resistance according to the value(s) in the table below.
   Fig 13: Measuring Resistance Of Three-Phase AC Cable For MGR

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   j2-1 - j8-2 (CBI) (Positive terminal)	Ignition switch off	Below 1 Ω
   j3-1 - j8-1 (CEI) (Negative terminal)	Ignition switch off	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	No. 3 Wire Frame (Inverter with Converter Assembly Side)
   *2	No. 3 Wire Frame (Hybrid Battery Junction Block Assembly Side)
   *a	Red Mark

6. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.
   Fig 14: Identifying J2 & J3 Body Ground & Shielded Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   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
   j2-1 - Body ground and shielded ground	Ignition switch off	10 MΩ or higher
   j3-1 - Body ground and shielded ground	Ignition switch off	10 MΩ or higher
   j2-1 - j3-1	Ignition switch off	10 MΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	No. 3 Wire Frame (Hybrid Battery Junction Block Assembly Side)
   *a	Red Mark

7. Connect the No. 3 wire frame to the hybrid battery junction block assembly.
8. Connect the No. 3 wire frame to the inverter with converter assembly.
9. Install the inverter terminal cover.

NG → See step   54 

OK: Go to next step 

1. 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.

2. Remove the hybrid battery junction block assembly.
3. Measure the resistance according to the value(s) in the table below.
   Fig 15: Inspecting Hybrid Battery Junction Block Assembly (SMRB)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z30 - j2	Auxiliary battery voltage is not applied between terminals z20-4 (SMRB) and z20-2 (GND)	10 kΩ or higher
   z30 - j2	Auxiliary battery voltage is applied between terminals z20-4 (SMRB) and z20-2 (GND)	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Hybrid Battery Junction Block Assembly

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z20-4 (SMRB) - z20-2 (GND)	-40 to 176°F (-40 to 80°C)	19.0 to 35.5 Ω

5. Install the hybrid battery junction block assembly.

NG → See step   55 

OK: Go to next step 

1. 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.

2. Remove the hybrid battery junction block assembly.
3. Measure the resistance according to the value(s) in the table below.
   Fig 16: Checking Hybrid Battery Junction Block Assembly (SMRG)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z31 - j3	Auxiliary battery voltage is not applied between terminals z20-1 (SMRG) and z20-2 (GND)	10 kΩ or higher
   z31 - j3	Auxiliary battery voltage is applied between terminals z20-1 (SMRG) and z20-2 (GND)	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Hybrid Battery Junction Block Assembly

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z20-1 (SMRG) - z20-2 (GND)	-40 to 176°F (-40 to 80°C)	19.0 to 35.5 Ω

5. Install the hybrid battery junction block assembly.

NG → See step   56 

OK: Go to next step 

NG → See step   44 

OK: Go to next step 

NG → REPAIR OR REPLACE POWER SOURCE CIRCUIT 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → See step   57 

OK: Go to next step 

NG → CONNECT SECURELY 

OK: Go to next step 

NG → CONNECT SECURELY 

OK: Go to next step 

NG → CONNECT SECURELY 

OK → See step   30 

NG → CONNECT SECURELY 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   33 

NG → CONNECT SECURELY 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   36 

NG → CONNECT SECURELY 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   39 

1. 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.

2. Check that the bolts for the rear motor cable are tightened to the specified torque, the rear motor cable is connected securely, and there are no contact problems.
   Fig 17: Identifying Rear Motor Cable & Fasteners

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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).

3. Disconnect the rear motor cable from the rear traction motor with transaxle assembly.
4. Check for arc marks at the bolts for the rear motor cable.

   Result

   Result		Proceed to
   The terminals are connected securely and there are no contact problems.	There are no arc marks.	A
   The terminals are not connected securely and there is a contact problem.	There are arc marks.	B
   The terminals are not connected securely and there is a contact problem.	There are no arc marks.	C
   The terminals are connected securely and there are no contact problems.	There are arc marks.	B

5. Connect the rear motor cable.

B → REPLACE MALFUNCTIONING PARTS 

C → CONNECT SECURELY 

A: Go to next step 

1. 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.

2. Remove the inverter terminal cover from the inverter with converter assembly.
   Fig 18: Identifying Inverter Terminal Cover, The Inverter With Converter Assembly & Bolts

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the rear motor cable from the inverter with converter assembly.
   Fig 19: Identifying Rear Motor Cable & Fasteners

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Disconnect the rear motor cable from the rear traction motor with transaxle assembly.
   Fig 20: Identifying Rear Motor Cable & Fasteners

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.
   Fig 21: Identifying Three-Phase AC Cables for MGR

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   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 shielded ground	Ignition switch off	10 MΩ or higher
   j9-2 (R-V) - Body ground and shielded ground	Ignition switch off	10 MΩ or higher
   j9-1 (R-W) - Body ground and shielded ground	Ignition switch off	10 MΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Three-phase AC Cable for MGR
   *a	Shielded Ground

   NOTE:

   Wrap the terminals of the three-phase AC cable with insulating tape to prevent them from coming into contact with body ground.

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   j9-3 (R-U) - j10-3 (R-U)	Ignition switch off	Below 1 Ω
   j9-2 (R-V) - j10-2 (R-V)	Ignition switch off	Below 1 Ω
   j9-1 (R-W) - j10-1 (R-W)	Ignition switch off	Below 1 Ω
   j9-3 (R-U) - j10-2 (R-V)	Ignition switch off	10 kΩ or higher
   j9-2 (R-V) - j10-1 (R-W)	Ignition switch off	10 kΩ or higher
   j9-1 (R-W) - j10-3 (R-U)	Ignition switch off	10 kΩ or higher

7. Connect the rear motor cable to the rear traction motor with transaxle assembly.
8. Connect the rear motor cable to the inverter with converter assembly.
9. Install the inverter terminal cover.

NG → See step   58 

OK: Go to next step 

1. 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.

2. Remove the rear traction motor with transaxle assembly.
3. Remove the extension wire assembly from the rear traction motor with transaxle assembly.
4. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.
   Fig 22: Identifying Extension Wire Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   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 - Body ground and shielded ground	Ignition switch off	10 MΩ or higher
   R-V - Body ground and shielded ground	Ignition switch off	10 MΩ or higher
   R-W - Body ground and shielded ground	Ignition switch off	10 MΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Extension Wire Assembly
   *a	Shielded Ground

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   R-U - R-U	Ignition switch off	Below 1 Ω
   R-V - R-V	Ignition switch off	Below 1 Ω
   R-W - R-W	Ignition switch off	Below 1 Ω
   R-U - R-V	Ignition switch off	10 kΩ or higher
   R-V - R-W	Ignition switch off	10 kΩ or higher
   R-W - R-U	Ignition switch off	10 kΩ or higher

6. Install the extension wire.
7. Install the rear traction motor with transaxle assembly.

NG → See step   59 

OK → See step   43 

NG → See step   46 

OK: Go to next step 

1. Replace the inverter with converter assembly. Refer to REMOVAL .

NEXT → REPLACE FUSE (PCU) 

1. Repair or replace the wire harness or connector.

NEXT → REPLACE FUSE (PCU)