P0A0D-351
L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A0D-350: High Voltage System Inter-Lock Circuit High
DTC P0A0D-350 - High Voltage System Inter-Lock Circuit High
DTC P0A0D-351 - High Voltage System Inter-Lock Circuit High
DESCRIPTION
- When the hybrid vehicle control ECU detects that a safety device is operated, it will prohibit the hybrid system operation or shut off the system main relay. There are three safety devices in three different locations. The first safety device is located at the service plug grip. The second one is located at the air conditioner fuse maintenance connector cover of the inverter with converter assembly. The third one is located at the air conditioning harness assembly that is connected to the inverter with converter assembly. If the service plug grip, inverter with converter assembly connector cover, or air conditioning harness assembly is removed, the interlock signal line will be open. If the vehicle is being driven, this condition will be determined to be an open malfunction and the system main relay will not be shut off. If the safety devices are installed correctly, the system returns to normal when the power switch is turned on (IG).
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 disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
PROCEDURE
1. CHECK DTC OUTPUT (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
DTC P0A1D is output.
YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CLEAR DTC (HV)
(a) Turn the power switch on (IG).
(b) Read and record the DTCs and freeze frame data.
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Clear the DTCs.
NEXT -- Continue to next step.
3. RECONFIRM DTC OUTPUT (HV)
(a) Turn the power switch on (IG).
(b) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(c) Recheck for DTCs.
Result:
DTC P0A0D-350 or P0A0D-351 is output again.
NO -- CHECK CONNECTOR CONNECTION CONDITION (INTERLOCK CIRCUIT)
YES -- Continue to next step.
4. CHECK SERVICE PLUG GRIP
CAUTION: Be sure to wear insulated gloves.
(a) Check if the service plug grip is installed correctly.
Result:
The service plug grip is installed correctly.
HINT: For the removal and installation procedures, L110 Hybrid Vehicle Control System.
NO -- CONNECT SECURELY
YES -- Continue to next step.
5. CHECK INVERTER WITH CONVERTER (CONNECTOR COVER ASSEMBLY INSTALLATION CONDITION)
(a) Check if the connector cover assembly of the inverter with converter assembly is installed correctly.
Result:
The connector cover assembly of the inverter with converter assembly is installed correctly.
NO -- CONNECT SECURELY
YES -- Continue to next step.
6. CHECK AIR CONDITIONING HARNESS ASSEMBLY (AIR CONDITIONING HARNESS ASSEMBLY CONNECTION CONDITION)
CAUTION: Be sure to wear insulated gloves.
(a) Check if the air conditioning harness assembly connector is connected correctly.
Result:
The air conditioning harness assembly connector is connected correctly.
NO -- CONNECT SECURELY
YES -- Continue to next step.
7. CHECK HYBRID VEHICLE CONTROL ECU
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off and remove the service plug grip L110 Hybrid Vehicle Control System.
NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedure because this may cause a malfunction.
(b) Disconnect connector A60 from the inverter with converter assembly.
(c) Turn the power switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTE: Turning the power switch on (IG) with the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
NG -- CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)
OK -- Continue to next step.
8. CHECK INVERTER WITH CONVERTER ASSEMBLY
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- CHECK INVERTER WITH CONVERTER ASSEMBLY (CONNECTOR COVER ASSEMBLY OF INVERTER WITH CONVERTER ASSEMBLY)
OK -- Continue to next step.
9. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - BATTERY PACK WIRE)
(a) Connect the connector to the inverter with converter assembly.
(b) Disconnect the battery pack wire connector Components.
(c) Turn the power switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTE: Turning the power switch on (IG) with the battery pack wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR (BATTERY PACK WIRE - BODY GROUND)
(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- CHECK SERVICE PLUG GRIP
OK -- Continue to next step.
11. CHECK CONNECTOR CONNECTION CONDITION (INTERLOCK CIRCUIT)
(a) Check the connections of each connector.
Result:
Dirt or foreign objects have not entered the connection, or there is no evidence of contamination.
NG -- REPAIR OR REPLACE CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU
12. CHECK SERVICE PLUG GRIP
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off and remove the service plug grip L110 Hybrid Vehicle Control System.
NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedure because this may cause a malfunction.
(b) Check the condition of the service plug grip interlock.
Result:
Dirt or foreign objects have not entered the connection, or there is no evidence of contamination.
NG -- REPLACE SERVICE PLUG GRIP
OK -- Continue to next step.
13. CHECK HARNESS AND CONNECTOR (INTERLOCK CONNECTOR CONNECTION CONDITION)
(a) Check that the interlock connector at the service plug grip installation socket is connected correctly.
Result:
The connector is connected correctly.
NG -- CONNECT SECURELY
OK -- Continue to next step.
14. CHECK HARNESS AND CONNECTOR (BATTERY PACK WIRE CONNECTOR - SERVICE PLUG GRIP)
CAUTION: Be sure to wear insulated gloves.
(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:
HINT: Perform this inspection after removing the battery carrier bracket because the service plug grip interlock connector is difficult to inspect Components.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY PACK WIRE CONNECTOR - SERVICE PLUG GRIP)
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SERVICE PLUG GRIP - BODY GROUND)
15. CHECK INVERTER WITH CONVERTER ASSEMBLY (CONNECTOR COVER ASSEMBLY OF INVERTER WITH CONVERTER ASSEMBLY)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off and remove the service plug grip L110 Hybrid Vehicle Control System.
NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedure because this may cause a malfunction.
(b) Remove the connector cover assembly from the inverter with converter assembly.
(c) Check the condition of the connector cover assembly interlock.
Result:
Dirt or foreign objects have not entered the connection, or there is no evidence of contamination.
NG -- REPLACE INVERTER WITH CONVERTER ASSEMBLY
OK -- Continue to next step.
16. CHECK AIR CONDITIONING HARNESS ASSEMBLY (INTERLOCK)
CAUTION: Be sure to wear insulated gloves.
(a) Remove the air conditioning harness assembly from the inverter with converter assembly.
(b) Check the condition of the air conditioning harness assembly interlock.
Result:
Dirt or foreign objects have not entered the connection, or there is no evidence of contamination.
NG -- REPLACE AIR CONDITIONING HARNESS ASSEMBLY
OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY
17. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)
(a) Turn the power switch off.
(b) Disconnect connector A54 from the hybrid vehicle control ECU.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU