DTC P19E1-00: DC/DC Converter System Performance [11/2022 - ]: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Remove the DC/DC fuse from the No. 1 engine room relay block and No. 1 junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   DC/DC fuse	Always	Below 1 Ω

4. Install the DC/DC fuse.
5. Connect the cable to the negative (-) auxiliary battery terminal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  15

Result: 

OK 

See step  2

Refer to PROCEDURE - Step 1

Result

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  3

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 appropriate service information because this may cause a malfunction.

2. Check the connection condition of the low voltage connectors of the inverter with converter assembly and the contact pressure of each terminal. Check the terminals for deformation, and the connector for water and foreign matter.

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [09/2021 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NOTE:

   Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off.

   OK

   - The connector is connected securely.

   - The terminals are not deformed and are connected securely.

   - No water or foreign matter in the connector.

   Result

   Result	Proceed to
   OK	A
   NG (The connector is not connected securely.)	B
   NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.)	C

   HINT: 

   When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result: 

B 

CONNECT SECURELY 

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

A 

See step  4

1. Remove the PCU NO. 2 fuse from the No. 1 engine room relay block and No. 1 junction block assembly.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   PCU NO. 2 fuse	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FUSE (PCU NO. 2) 

Result: 

OK 

See step  5

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 appropriate service information because this may cause a malfunction.

2. Disconnect the inverter with converter assembly connector.
3. Connect the cable to the negative (-) auxiliary battery terminal.
4. Turn the ignition switch to ON.
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A188-3 (IGCT) - Body ground	Ignition switch ON	Same as auxiliary battery voltage

   NOTE:

   Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

6. Turn the ignition switch off.
7. Disconnect the cable from the negative (-) auxiliary battery terminal.
8. Reconnect the inverter with converter assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE MALFUNCTIONING PARTS 

Result: 

OK 

See step  6

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 appropriate service information because this may cause a malfunction.

2. Connect the cable to the negative (-) auxiliary battery terminal.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D1-1 (AMD) - Body ground	Ignition switch off	Same as auxiliary battery voltage

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	AMD Terminal (Inverter with Converter Assembly Side)
   *2	AMD Terminal (No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Side)
   *a	D1-1 (AMD)

4. Disconnect the cable from the negative (-) auxiliary battery terminal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

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 appropriate service information because this may cause a malfunction.

2. Check that the nuts for the AMD terminal are tightened to the specified torque, the AMD terminal is connected securely, and there are no contact problems.

   Result

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	AMD Terminal (Inverter with Converter Assembly Side)
   *2	AMD Terminal (No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Side)

Result: 

B 

CONNECT SECURELY 

Result: 

C 

REPLACE MALFUNCTIONING PARTS 

Result: 

A 

See step  8

Refer to PROCEDURE - Step 5 [11/2022 - 12/2024] , or refer to PROCEDURE - Step 5 [12/2024 - ]

OK

The ground wire is securely installed.

Result

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  9

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 appropriate service information because this may cause a malfunction.

2. Disconnect the inverter with converter assembly connector.
3. Disconnect the hybrid vehicle control ECU connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   A188-5 (CNH) - I249-9 (CA4H)	Ignition switch off	Below 1 Ω
   A188-4 (CNL) - I249-22 (CA4L)	Ignition switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   A188-5 (CNH) or I249-9 (CA4H) - Body ground and other terminals	Ignition switch off	10 kΩ or higher
   A188-4 (CNL) or I249-22 (CA4L) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

5. Reconnect the hybrid vehicle control ECU connector.
6. Reconnect the inverter with converter assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  10

1. Disconnect the hybrid vehicle control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Hybrid Vehicle Control ECU)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I249-9 (CA4H) - I249-22 (CA4L)	Ignition switch off	80 to 170 Ω

3. Reconnect the hybrid vehicle control ECU connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HYBRID VEHICLE CONTROL ECU 

Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

Result: 

OK 

See step  11

Refer to Cooling System [11/2022 - ]

Result

Result: 

NEXT 

See step  12

HINT: 

The current at the AMD terminal cannot be measured directly because of space limitations. Measure the current flowing at the auxiliary battery instead.

1. Connect the AC/DC 400 A probe of the tester to the positive (+) auxiliary battery cable.
2. Install the service plug grip.
3. Connect the cable to the negative (-) auxiliary battery terminal.
4. Turn the ignition switch to ON (READY) and leave the vehicle as it is until the electric current flowing to the auxiliary battery becomes 10 A or less.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Probe Direction
   *b	Current Flowing to Auxiliary Battery

   HINT: 

   If the ignition switch turns off immediately after it is turned to ON (READY), auxiliary battery voltage may be low. Recharge the auxiliary battery and perform this procedure again.

5. 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

   *a	Probe Direction
   *b	Current Flowing from Auxiliary Battery

   Standard Current

   Item	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)

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

   Standard Voltage

   Item	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.)	12.5 to 15 V

7. Turn the ignition switch off.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  14

Result: 

OK 

See step  13

1. Check for DTCs.

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Result	Proceed to
   P19E1-00 is output.	A
   P19E1-00 is not output.	B

   HINT: 

   As the DTC detection conditions include decreased auxiliary battery voltage, if the DTC is not input again, when the auxiliary battery is charged it can be judged that the vehicle has returned to normal.

2. Turn the ignition switch off.

Result: 

A 

REPLACE INVERTER WITH CONVERTER ASSEMBLY 

Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

Result: 

B 

RECHARGE AUXILIARY BATTERY 

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 appropriate service information because this may cause a malfunction.

2. Remove the inverter cover from the inverter with converter assembly.
3. 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	Condition	Specified Condition
   Y2-1 (W) - Body ground and shield ground	Ignition switch off	1 MΩ or higher
   Y2-2 (U) - Body ground and shield ground	Ignition switch off	1 MΩ or higher
   Y2-3 (V) - Body ground and shield ground	Ignition switch off	1 MΩ or higher
   Y2-4 (W) - Body ground and shield ground	Ignition switch off	1 MΩ or higher
   Y2-5 (U) - Body ground and shield ground	Ignition switch off	1 MΩ or higher
   Y2-6 (V) - Body ground and shield ground	Ignition switch off	1 MΩ or higher

   HINT: 

   Perform this inspection while the motor cable is connected.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

4. Install the inverter cover to the inverter with converter assembly.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE INVERTER WITH CONVERTER ASSEMBLY 

Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

Result: 

NG 

See step  17

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 appropriate service information because this may cause a malfunction.

2. Disconnect the cable from the negative (-) auxiliary battery terminal.
3. Disconnect the engine wire from the AMD terminal connector (inverter with converter assembly side and No. 1 engine room relay block and No. 1 junction block assembly side).
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D1-1 (AMD) or 2D-1 - Body ground and other terminals	Ignition switch off	10 kΩ or higher

5. Reconnect the AMD terminal connector.
6. Connect the cable to the negative (-) auxiliary battery terminal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  20

Result: 

OK 

See step  16

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 appropriate service information because this may cause a malfunction.

2. Disconnect the engine wire from the inverter with converter assembly (AMD terminal connector).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D1-1 (AMD) - Body ground	Ignition switch off	10 kΩ or higher

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected Inverter with Converter Assembly
   *b	D1-1 (AMD)

4. Reconnect the engine wire.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FUSE (DC/DC) 

Result: 

NG 

See step  19

Refer to Generator High-voltage Circuit [11/2022 - ]

Result

Result: 

NEXT 

See step  18

Refer to Motor High-voltage Circuit [11/2022 - ]

HINT: 

If the "Motor High-voltage Circuit" inspection results are normal, perform the next step.

Result

Result: 

NEXT 

REPLACE INVERTER WITH CONVERTER ASSEMBLY 

Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

Result

Result: 

NEXT 

REPLACE FUSE (DC/DC) 

Result

Result: 

NEXT 

REPLACE FUSE (DC/DC)