HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A0D-350, P0A0D-351

DTC Code	DTC Name
P0A0D-350	High Voltage System Inter-Lock Circuit High
P0A0D-351	High Voltage System Inter-Lock Circuit High

DESCRIPTION

When the power management control ECU detects that a safety device is operated, it will prohibit hybrid system operation or shut off the system main relay. The 5 safety devices are located as follows; 1 in the service plug grip, and at the inverter with converter assembly, there is 1 on the connector cover assembly for the air conditioning fuse, 1 on the upper inverter cover for the terminals of the motor cable, 1 on the upper inverter cover for the terminals of the generator cable and 1 in the No. 4 engine wire (air conditioning harness). If the service plug grip, connector cover assembly, upper inverter cover, or No. 4 engine wire (air conditioning harness) is removed, the interlock signal line will be open. If the vehicle is being driven, this condition will be determined to be an open circuit and the system main relays will not be shut off. If the safety devices are re-installed correctly, the system will return to normal when the power switch is turned on (IG).

DTC No.	INF Code	DTC Detection Condition	Trouble Are
P0A0D	350	Operating any of the safety devices with the vehicle stopped (ILK signal is ON) and turning the power switch on (IG)	Wire harness or connector Power management control ECU Service plug grip Inverter with converter assembly No. 4 engine wire Upper inverter cover
P0A0D	351	Interlock signal line opens (ILK signal is ON) while the vehicle is being driven

WIRING DIAGRAM

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 removing 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 Click here.

Tech Tips

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

PROCEDURE

CHECK DTC OUTPUT (HYBRID CONTROL)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

Check if DTCs are output.

Result

Result	Proceed to
P0A0D only is output.	A
P0A1D is output	B

Turn the power switch off.

GO TO DTC CHART (P0A1D) Click here

CLEAR DTC
1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Read and record the DTCs and freeze frame data.
5. Clear DTCs and freeze frame data.
6. Turn the power switch off.
NEXT

CHECK DTC OUTPUT (HYBRID CONTROL)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

Check if DTCs are output.

Result

Result	Proceed to
P0A0D-350 or P0A0D-351 is output again.	A
Neither P0A0D-350 or P0A0D-351 is output again.	B

Turn the power switch off.

CHECK CONNECTOR CONNECTION CONDITION (INTERLOCK CIRCUIT) Click here

CHECK SERVICE PLUG GRIP

CAUTION:

Be sure to wear insulated gloves.
1. Check if the service plug grip is installed correctly.
  Tech Tips
  - For the removal and installation procedures Click here.
  - P0A0D-350 is also set if the power switch is turned on (IG) with the service plug grip removed. Confirm the conditions when the malfunction occurred.
NG
INSTALL PARTS CORRECTLY

OK
CHECK UPPER INVERTER COVER (GENERATOR CABLE SIDE)

CAUTION:

Be sure to wear insulated gloves.
1. 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.
2. Check if the upper inverter cover (generator cable side) of the inverter with converter assembly is installed correctly.
  
  OK
  
  The upper inverter cover (generator cable side) is installed correctly.
NG
INSTALL PARTS CORRECTLY

OK
CHECK UPPER INVERTER COVER (MOTOR CABLE SIDE)

CAUTION:

Be sure to wear insulated gloves.
1. 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.
2. Check if the upper inverter cover (motor cable side) of the inverter with converter assembly is installed correctly.
  
  OK
  
  The upper inverter cover (motor cable side) is installed correctly.
NG
INSTALL PARTS CORRECTLY

OK
CHECK CONNECTOR COVER ASSEMBLY

CAUTION:

Be sure to wear insulated gloves.
1. 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.
2. Check if the connector cover assembly of the inverter with converter assembly is installed correctly.
  
  OK
  
  The connector cover assembly is installed correctly.
NG
INSTALL PARTS CORRECTLY

OK
CHECK NO. 4 ENGINE WIRE

CAUTION:

Be sure to wear insulated gloves.
1. 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.
2. Check if the No. 4 engine wire (air conditioning harness) is connected correctly.
  
  OK
  
  The No. 4 engine wire (air conditioning harness) connector is connected correctly.
NG
INSTALL PARTS CORRECTLY

OK

OK
The upper inverter cover (generator cable side) is installed correctly.

OK
The upper inverter cover (motor cable side) is installed correctly.

OK
The connector cover assembly is installed correctly.

OK
The No. 4 engine wire (air conditioning harness) connector is connected correctly.

CHECK POWER MANAGEMENT CONTROL ECU

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 A14 from the inverter with converter assembly.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
A14-16 (ILKI) - Body ground	Power switch on (IG)	11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Inverter with Converter Assembly)

Note

Turning the power switch on (IG) with the inverter with converter assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Connect the inverter with converter assembly connector.

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - POWER MANAGEMENT CONTROL ECU) Click here

CHECK INVERTER WITH CONVERTER ASSEMBLY (INTERLOCK)

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 A14 from the inverter with converter assembly.

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

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
A14-16 (ILKI) - A14-5 (ILKO)	Power switch off	Less than 10 Ω

Text in Illustration
*a	Component without harness connected (Inverter with Converter Assembly)

Note

Do not remove the upper inverter cover, connector cover assembly and No. 4 engine wire.

Connect the inverter with converter assembly connector.

CHECK UPPER INVERTER COVER (GENERATOR CABLE SIDE) Click here

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - BODY GROUND)

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 A14 from the inverter with converter assembly.
Install the service plug grip.

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

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
A14-5 (ILKO) - Body ground	Power switch off	Below 1 Ω

Text in Illustration
*a	Front view of wire harness connector (to Inverter with Converter Assembly)

Remove the service plug grip.
Connect the inverter with converter assembly connector.

CHECK SERVICE PLUG GRIP Click here

CHECK CONNECTOR CONNECTION CONDITION (INTERLOCK CIRCUIT)
1. Check the connections of each connector.
  
  OK
  
  Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.
NG
REPAIR OR REPLACE CONNECTOR

OK

REPLACE POWER MANAGEMENT CONTROL ECU Click here
CHECK SERVICE PLUG GRIP
1. Remove the service plug grip.
2. Check the condition of the service plug grip interlock.
  
  Text in Illustration
  
  *1 Service Plug Grip
  
  OK
  
  Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.
3. Install the service plug grip.
NG
REPLACE SERVICE PLUG GRIP Click here

OK
CHECK CONNECTOR CONNECTION CONDITION (INTERLOCK CONNECTOR)

CAUTION:

Be sure to wear insulated gloves.
1. 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.
2. Check that the interlock connector at the service plug grip installation socket is connected correctly.
  
  Text in Illustration
  
  *1 Interlock Connector
  
  OK
  
  The connector is connected correctly.
NG
CONNECT SECURELY

OK

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

Text in Illustration
*1	Service Plug Grip

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

Text in Illustration
*1	Interlock Connector

OK
The connector is connected correctly.

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - SERVICE PLUG GRIP)

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 A14 from the inverter with converter assembly.
Disconnect connector r2 from the service plug.

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

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
A14-5 (ILKO) - r2-1(ILK)	Power switch off	Below 1 Ω

Text in Illustration
*a	Front view of wire harness connector (to Inverter with Converter Assembly)
*b	Front view of wire harness connector (to Service Plug Grip)

Connect the service plug grip connector.
Connect the inverter with converter assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - SERVICE PLUG GRIP)

REPAIR OR REPLACE HARNESS OR CONNECTOR (SERVICE PLUG GRIP - BODY GROUND)

CHECK UPPER INVERTER COVER (GENERATOR CABLE SIDE)

CAUTION:

Be sure to wear insulated gloves.
1. 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.
2. Remove the upper inverter cover (generator cable side) from the inverter with converter assembly.
3. Check the condition of the upper inverter cover (generator cable side) interlock.
  
  OK
  
  Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.
  
  Text in Illustration
  
  *1 Upper Inverter Cover (Generator Cable Side)
4. Install the upper inverter cover (generator cable side) to the inverter with converter assembly.
NG
REPLACE UPPER INVERTER COVER (GENERATOR CABLE SIDE) Click here

OK
CHECK UPPER INVERTER COVER (MOTOR CABLE SIDE)

CAUTION:

Be sure to wear insulated gloves.
1. 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.
2. Remove the upper inverter cover (motor cable side) from the inverter with converter assembly.
3. Check the condition of the upper inverter cover (motor cable side) interlock.
  
  OK
  
  Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.
  
  Text in Illustration
  
  *1 Upper Inverter Cover (Motor Cable Side)
4. Install the upper inverter cover (motor cable side) to the inverter with converter assembly.
NG
REPLACE UPPER INVERTER COVER (MOTOR CABLE SIDE) Click here

OK
CHECK CONNECTOR COVER ASSEMBLY

CAUTION:

Be sure to wear insulated gloves.
1. 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.
2. Remove the connector cover assembly from the inverter with converter assembly.
3. Check the condition of the connector cover assembly interlock.
  
  OK
  
  Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.
  
  Tech Tips
  
  The connector cover assembly is not available separately. If it requires replacement, replace the inverter with converter assembly.
  
  Text in Illustration
  
  *1 Connector Cover Assembly
4. Install the connector cover assembly to the inverter with converter assembly.
NG
REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

OK
CHECK NO. 4 ENGINE WIRE (NO. 4 ENGINE WIRE CONNECTOR)

CAUTION:

Be sure to wear insulated gloves.
1. 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.
2. Disconnect the No. 4 engine wire (air conditioning harness) from the inverter with converter assembly.
3. Check the No. 4 engine wire (air conditioning harness) interlock.
  
  OK
  
  Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.
  
  Text in Illustration
  
  *1 No. 4 engine wire (air conditioning harness)
4. Connect the No. 4 engine wire (air conditioning harness) to the inverter with converter assembly.
NG
REPLACE NO. 4 ENGINE WIRE

OK

REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

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 A14 from the inverter with converter assembly.
Disconnect connector A38 from the power management control ECU.

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

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
A14-16 (ILKI) - A38-32 (ILK)	Power switch off	Below 1 Ω

Text in Illustration
*a	Front view of wire harness connector (to Inverter with Converter Assembly)
*b	Rear view of wire harness connector (to Power Management Control ECU)

Connect the power management control ECU connector.
Connect the inverter with converter assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE POWER MANAGEMENT CONTROL ECU Click here