P0A0D-350, P0A0D-351

Info Added 2017-08-02

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

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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

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

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).

Tip:
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).

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PROCEDURE

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CHECK DTC OUTPUT (HYBRID CONTROL)

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

Check for DTCs.

Result

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

Turn the power switch off.

AClick here
B
GO TO DTC CHART (P0A1D) (Click here)

Click here
CLEAR DTC
1. Connect the GTS 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 the DTCs and freeze frame data.
6. Turn the power switch off.
- NEXTClick here

Click here

CHECK DTC OUTPUT (HYBRID CONTROL)

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

Check for DTCs.

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.

AClick here
BClick here

Click here
CHECK SERVICE PLUG GRIP

CAUTION:

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

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.

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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 the A14 inverter with converter assembly connector.
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	Condition	Specified Condition
A14-16 (ILKI) - Body ground	Power switch on (IG)	11 to 14 V

Table 1. 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.
Reconnect the A14 inverter with converter assembly connector.

OKClick here
NGClick here

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 the A14 inverter with converter assembly connector.

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

Standard Resistance

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

Table 2. 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.

Reconnect the A14 inverter with converter assembly connector.

OKClick here
NGClick here

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

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

Standard Resistance

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

Table 3. Text in Illustration
*a	Front view of wire harness connector (to Inverter with Converter Assembly)

Remove the service plug grip.
Reconnect the A14 inverter with converter assembly connector.

OKClick here
NGClick here

Click here

CHECK CONNECTOR CONNECTION CONDITION (INTERLOCK CIRCUIT)

Check the connections of each connector.

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

OK
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)
NG
REPAIR OR REPLACE CONNECTOR

Click here

CHECK SERVICE PLUG GRIP

CAUTION:

Be sure to wear insulated gloves.

Remove the service plug grip.

Check the condition of the service plug grip interlock.

Table 4. Text in Illustration
*1	Service Plug Grip

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

Install the service plug grip.

OKClick here
NG
REPLACE SERVICE PLUG GRIP (Click here)

Click here
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.
  
  Table 5. Text in Illustration
  
  *1 Interlock Connector
  
  OK
  
  The connector is connected correctly.
- OKClick here
- NG
  CONNECT SECURELY

Table 5. Text in Illustration
*1	Interlock Connector

OK
The connector is connected correctly.

Click here

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 the A14 inverter with converter assembly connector.
Disconnect the g2 service plug connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A14-5 (ILKO) - g2-1(ILK)	Power switch off	Below 1 Ω

Table 6. 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)

Reconnect the g2 service plug grip connector.
Reconnect the A14 inverter with converter assembly connector.

OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (SERVICE PLUG GRIP - BODY GROUND)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - SERVICE PLUG GRIP)

Click here

CHECK UPPER INVERTER COVER (GENERATOR CABLE SIDE)

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 upper inverter cover (generator cable side) from the inverter with converter assembly.

Check the condition of the upper inverter cover (generator cable side) interlock.

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

Table 7. Text in Illustration
*1	Upper Inverter Cover (Generator Cable Side)

Install the upper inverter cover (generator cable side) to the inverter with converter assembly.

OKClick here
NG
REPLACE UPPER INVERTER COVER (GENERATOR CABLE SIDE) (Click here)

Click here

CHECK UPPER INVERTER COVER (MOTOR CABLE SIDE)

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 upper inverter cover (motor cable side) from the inverter with converter assembly.

Check the condition of the upper inverter cover (motor cable side) interlock.

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

Table 8. Text in Illustration
*1	Upper Inverter Cover (Motor Cable Side)

Install the upper inverter cover (motor cable side) to the inverter with converter assembly.

OKClick here
NG
REPLACE UPPER INVERTER COVER (MOTOR CABLE SIDE) (Click here)

Click here

CHECK CONNECTOR COVER ASSEMBLY

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 connector cover assembly from the inverter with converter assembly.

Check the condition of the connector cover assembly interlock.

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

Tip:

The connector cover assembly is not available as a supply part. If it requires replacement, replace the inverter with converter assembly.

Table 9. Text in Illustration
*1	Connector Cover Assembly

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

OKClick here
NG
REPLACE INVERTER WITH CONVERTER ASSEMBLY (Click here)

Click here

CHECK NO. 4 ENGINE WIRE

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 the No. 4 engine wire (air conditioning harness) from the inverter with converter assembly.

Check the No. 4 engine wire (air conditioning harness) interlock.

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

Table 10. Text in Illustration
*1	No. 4 engine wire (air conditioning harness)

Connect the No. 4 engine wire (air conditioning harness) to the inverter with converter assembly.

OK
REPLACE INVERTER WITH CONVERTER ASSEMBLY (Click here)
NG
REPLACE NO. 4 ENGINE WIRE

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 the A14 inverter with converter assembly connector.
Disconnect the A31 power management control ECU connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A14-16 (ILKI) - A31-32 (ILK)	Power switch off	Below 1 Ω

Table 11. 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)

Reconnect the A31 power management control ECU connector.
Reconnect the A14 inverter with converter assembly connector.

OK
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

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